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/* |
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* Copyright (C) 2004-2006 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dev_vga.c,v 1.95 2006/01/01 13:17:18 debug Exp $ |
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* |
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* VGA charcell and graphics device. |
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* |
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* It should work with 80x25 and 40x25 text modes, and with a few graphics |
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* modes as long as no fancy VGA features are used. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "console.h" |
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#include "cpu.h" |
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#include "devices.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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#include "vga.h" |
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|
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/* These are generated from binary font files: */ |
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#include "fonts/font8x8.c" |
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#include "fonts/font8x10.c" |
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#include "fonts/font8x16.c" |
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|
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|
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/* For videomem -> framebuffer updates: */ |
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#define VGA_TICK_SHIFT 18 |
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|
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#define MAX_RETRACE_SCANLINES 420 |
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#define N_IS1_READ_THRESHOLD 50 |
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|
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#define GFX_ADDR_WINDOW 0x18000 |
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|
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#define VGA_FB_ADDR 0x1c00000000ULL |
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|
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#define MODE_CHARCELL 1 |
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#define MODE_GRAPHICS 2 |
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|
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#define GRAPHICS_MODE_8BIT 1 |
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#define GRAPHICS_MODE_4BIT 2 |
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|
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struct vga_data { |
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uint64_t videomem_base; |
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uint64_t control_base; |
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|
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struct vfb_data *fb; |
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uint32_t fb_size; |
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|
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int fb_max_x; /* pixels */ |
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int fb_max_y; /* pixels */ |
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int max_x; /* charcells or pixels */ |
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int max_y; /* charcells or pixels */ |
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|
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/* Selects charcell mode or graphics mode: */ |
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int cur_mode; |
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|
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/* Common for text and graphics modes: */ |
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int pixel_repx, pixel_repy; |
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|
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/* Textmode: */ |
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int font_width; |
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int font_height; |
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unsigned char *font; |
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size_t charcells_size; |
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unsigned char *charcells; /* 2 bytes per char */ |
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unsigned char *charcells_outputed; /* text */ |
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unsigned char *charcells_drawn; /* framebuffer */ |
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|
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/* Graphics: */ |
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int graphics_mode; |
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int bits_per_pixel; |
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unsigned char *gfx_mem; |
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uint32_t gfx_mem_size; |
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|
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/* Registers: */ |
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int attribute_state; /* 0 or 1 */ |
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unsigned char attribute_reg_select; |
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unsigned char attribute_reg[256]; |
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|
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unsigned char misc_output_reg; |
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|
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unsigned char sequencer_reg_select; |
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unsigned char sequencer_reg[256]; |
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|
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unsigned char graphcontr_reg_select; |
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unsigned char graphcontr_reg[256]; |
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|
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unsigned char crtc_reg_select; |
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unsigned char crtc_reg[256]; |
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|
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unsigned char palette_read_index; |
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char palette_read_subindex; |
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unsigned char palette_write_index; |
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char palette_write_subindex; |
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|
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int current_retrace_line; |
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int input_status_1; |
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|
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/* Palette per scanline during retrace: */ |
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unsigned char *retrace_palette; |
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int use_palette_per_line; |
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int64_t n_is1_reads; |
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|
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/* Misc.: */ |
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int console_handle; |
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|
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int cursor_x; |
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int cursor_y; |
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|
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int modified; |
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int palette_modified; |
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int update_x1; |
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int update_y1; |
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int update_x2; |
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int update_y2; |
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}; |
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|
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|
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/* |
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* recalc_cursor_position(): |
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* |
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* Should be called whenever the cursor location _or_ the display |
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* base has been changed. |
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*/ |
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static void recalc_cursor_position(struct vga_data *d) |
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{ |
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int base = (d->crtc_reg[VGA_CRTC_START_ADDR_HIGH] << 8) |
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+ d->crtc_reg[VGA_CRTC_START_ADDR_LOW]; |
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int ofs = d->crtc_reg[VGA_CRTC_CURSOR_LOCATION_HIGH] * 256 + |
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d->crtc_reg[VGA_CRTC_CURSOR_LOCATION_LOW]; |
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ofs -= base; |
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d->cursor_x = ofs % d->max_x; |
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d->cursor_y = ofs / d->max_x; |
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} |
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|
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|
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/* |
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* register_reset(): |
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* |
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* Resets many registers to sane values. |
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*/ |
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static void register_reset(struct vga_data *d) |
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{ |
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/* Home cursor and start at the top: */ |
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d->crtc_reg[VGA_CRTC_CURSOR_LOCATION_HIGH] = |
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d->crtc_reg[VGA_CRTC_CURSOR_LOCATION_LOW] = 0; |
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d->crtc_reg[VGA_CRTC_START_ADDR_HIGH] = |
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d->crtc_reg[VGA_CRTC_START_ADDR_LOW] = 0; |
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|
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recalc_cursor_position(d); |
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|
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/* Reset cursor scanline stuff: */ |
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d->crtc_reg[VGA_CRTC_CURSOR_SCANLINE_START] = d->font_height - 2; |
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d->crtc_reg[VGA_CRTC_CURSOR_SCANLINE_END] = d->font_height - 1; |
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|
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d->sequencer_reg[VGA_SEQ_MAP_MASK] = 0x0f; |
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d->graphcontr_reg[VGA_GRAPHCONTR_MASK] = 0xff; |
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|
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d->misc_output_reg = VGA_MISC_OUTPUT_IOAS; |
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d->n_is1_reads = 0; |
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} |
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|
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|
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static void c_putstr(struct vga_data *d, char *s) |
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{ |
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while (*s) |
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console_putchar(d->console_handle, *s++); |
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} |
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|
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|
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/* |
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* reset_palette(): |
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*/ |
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static void reset_palette(struct vga_data *d, int grayscale) |
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{ |
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int i, r, g, b; |
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|
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/* TODO: default values for entry 16..255? */ |
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for (i=16; i<256; i++) |
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d->fb->rgb_palette[i*3 + 0] = d->fb->rgb_palette[i*3 + 1] = |
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d->fb->rgb_palette[i*3 + 2] = (i & 15) * 4; |
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d->palette_modified = 1; |
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i = 0; |
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|
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if (grayscale) { |
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for (r=0; r<2; r++) |
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for (g=0; g<2; g++) |
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for (b=0; b<2; b++) { |
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d->fb->rgb_palette[i + 0] = |
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d->fb->rgb_palette[i + 1] = |
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d->fb->rgb_palette[i + 2] = |
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(r+g+b) * 0xaa / 3; |
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d->fb->rgb_palette[i + 8*3 + 0] = |
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d->fb->rgb_palette[i + 8*3 + 1] = |
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d->fb->rgb_palette[i + 8*3 + 2] = |
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(r+g+b) * 0xaa / 3 + 0x55; |
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i+=3; |
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} |
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return; |
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} |
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|
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for (r=0; r<2; r++) |
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for (g=0; g<2; g++) |
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for (b=0; b<2; b++) { |
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d->fb->rgb_palette[i + 0] = r * 0xaa; |
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d->fb->rgb_palette[i + 1] = g * 0xaa; |
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d->fb->rgb_palette[i + 2] = b * 0xaa; |
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i+=3; |
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} |
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for (r=0; r<2; r++) |
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for (g=0; g<2; g++) |
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for (b=0; b<2; b++) { |
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d->fb->rgb_palette[i + 0] = r * 0xaa + 0x55; |
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d->fb->rgb_palette[i + 1] = g * 0xaa + 0x55; |
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d->fb->rgb_palette[i + 2] = b * 0xaa + 0x55; |
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i+=3; |
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} |
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} |
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|
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|
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/* |
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* vga_update_textmode(): |
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* |
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* Called from vga_update() when use_x11 is false. This causes modified |
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* character cells to be "simulated" by outputing ANSI escape sequences |
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* that draw the characters in a terminal window instead. |
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*/ |
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static void vga_update_textmode(struct machine *machine, |
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struct vga_data *d, int base, int start, int end) |
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{ |
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char s[50]; |
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int i, oldcolor = -1, printed_last = 0; |
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|
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for (i=start; i<=end; i+=2) { |
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unsigned char ch = d->charcells[base+i]; |
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int fg = d->charcells[base+i+1] & 15; |
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int bg = (d->charcells[base+i+1] >> 4) & 15; |
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/* top bit of bg = blink */ |
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int x = (i/2) % d->max_x; |
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int y = (i/2) / d->max_x; |
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|
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if (d->charcells[base+i] == d->charcells_outputed[i] && |
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d->charcells[base+i+1] == d->charcells_outputed[i+1]) { |
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printed_last = 0; |
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continue; |
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} |
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|
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d->charcells_outputed[i] = d->charcells[base+i]; |
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d->charcells_outputed[i+1] = d->charcells[base+i+1]; |
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|
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if (!printed_last || x == 0) { |
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snprintf(s, sizeof(s), "\033[%i;%iH", y + 1, x + 1); |
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c_putstr(d, s); |
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} |
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if (oldcolor < 0 || (bg<<4)+fg != oldcolor || !printed_last) { |
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snprintf(s, sizeof(s), "\033[0;"); c_putstr(d, s); |
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|
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switch (fg & 7) { |
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case 0: c_putstr(d, "30"); break; |
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case 1: c_putstr(d, "34"); break; |
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case 2: c_putstr(d, "32"); break; |
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case 3: c_putstr(d, "36"); break; |
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case 4: c_putstr(d, "31"); break; |
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case 5: c_putstr(d, "35"); break; |
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case 6: c_putstr(d, "33"); break; |
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case 7: c_putstr(d, "37"); break; |
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} |
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if (fg & 8) |
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c_putstr(d, ";1"); |
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c_putstr(d, ";"); |
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switch (bg & 7) { |
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case 0: c_putstr(d, "40"); break; |
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case 1: c_putstr(d, "44"); break; |
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case 2: c_putstr(d, "42"); break; |
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case 3: c_putstr(d, "46"); break; |
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case 4: c_putstr(d, "41"); break; |
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case 5: c_putstr(d, "45"); break; |
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case 6: c_putstr(d, "43"); break; |
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case 7: c_putstr(d, "47"); break; |
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} |
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/* TODO: blink */ |
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c_putstr(d, "m"); |
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} |
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|
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if (ch >= 0x20 && ch != 127) |
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console_putchar(d->console_handle, ch); |
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|
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oldcolor = (bg << 4) + fg; |
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printed_last = 1; |
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} |
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|
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/* Restore the terminal's cursor position: */ |
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snprintf(s, sizeof(s), "\033[%i;%iH", d->cursor_y + 1, d->cursor_x + 1); |
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c_putstr(d, s); |
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} |
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|
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|
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/* |
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* vga_update_graphics(): |
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* |
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* This function should be called whenever any part of d->gfx_mem[] has |
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* been written to. It will redraw all pixels within the range x1,y1 |
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* .. x2,y2 using the right palette. |
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*/ |
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static void vga_update_graphics(struct machine *machine, struct vga_data *d, |
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int x1, int y1, int x2, int y2) |
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{ |
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int x, y, ix, iy, c, rx = d->pixel_repx, ry = d->pixel_repy; |
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unsigned char pixel[3]; |
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|
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for (y=y1; y<=y2; y++) |
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for (x=x1; x<=x2; x++) { |
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/* addr is where to read from VGA memory, addr2 is |
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where to write on the 24-bit framebuffer device */ |
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int addr = (y * d->max_x + x) * d->bits_per_pixel; |
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switch (d->bits_per_pixel) { |
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case 8: addr >>= 3; |
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c = d->gfx_mem[addr]; |
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pixel[0] = d->fb->rgb_palette[c*3+0]; |
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pixel[1] = d->fb->rgb_palette[c*3+1]; |
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pixel[2] = d->fb->rgb_palette[c*3+2]; |
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break; |
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case 4: addr >>= 2; |
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if (addr & 1) |
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c = d->gfx_mem[addr >> 1] >> 4; |
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else |
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c = d->gfx_mem[addr >> 1] & 0xf; |
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pixel[0] = d->fb->rgb_palette[c*3+0]; |
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pixel[1] = d->fb->rgb_palette[c*3+1]; |
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pixel[2] = d->fb->rgb_palette[c*3+2]; |
360 |
break; |
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} |
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for (iy=y*ry; iy<(y+1)*ry; iy++) |
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for (ix=x*rx; ix<(x+1)*rx; ix++) { |
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uint32_t addr2 = (d->fb_max_x * iy |
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+ ix) * 3; |
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if (addr2 < d->fb_size) |
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dev_fb_access(machine->cpus[0], |
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machine->memory, addr2, |
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pixel, sizeof(pixel), |
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MEM_WRITE, d->fb); |
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} |
372 |
} |
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} |
374 |
|
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|
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/* |
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* vga_update_text(): |
378 |
* |
379 |
* This function should be called whenever any part of d->charcells[] has |
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* been written to. It will redraw all characters within the range x1,y1 |
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* .. x2,y2 using the right palette. |
382 |
*/ |
383 |
static void vga_update_text(struct machine *machine, struct vga_data *d, |
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int x1, int y1, int x2, int y2) |
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{ |
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int fg, bg, x,y, subx, line; |
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size_t i, start, end, base; |
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int font_size = d->font_height; |
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int font_width = d->font_width; |
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unsigned char *pal = d->fb->rgb_palette; |
391 |
|
392 |
if (d->pixel_repx * font_width > 8*8) { |
393 |
fatal("[ too large font ]\n"); |
394 |
return; |
395 |
} |
396 |
|
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/* Hm... I'm still using the old start..end code: */ |
398 |
start = (d->max_x * y1 + x1) * 2; |
399 |
end = (d->max_x * y2 + x2) * 2; |
400 |
|
401 |
start &= ~1; |
402 |
end |= 1; |
403 |
|
404 |
if (end >= d->charcells_size) |
405 |
end = d->charcells_size - 1; |
406 |
|
407 |
base = ((d->crtc_reg[VGA_CRTC_START_ADDR_HIGH] << 8) |
408 |
+ d->crtc_reg[VGA_CRTC_START_ADDR_LOW]) * 2; |
409 |
|
410 |
if (!machine->use_x11) |
411 |
vga_update_textmode(machine, d, base, start, end); |
412 |
|
413 |
for (i=start; i<=end; i+=2) { |
414 |
unsigned char ch = d->charcells[i + base]; |
415 |
|
416 |
if (!d->palette_modified && d->charcells_drawn[i] == ch && |
417 |
d->charcells_drawn[i+1] == d->charcells[i+base+1]) |
418 |
continue; |
419 |
|
420 |
d->charcells_drawn[i] = ch; |
421 |
d->charcells_drawn[i+1] = d->charcells[i + base + 1]; |
422 |
|
423 |
fg = d->charcells[i+base + 1] & 15; |
424 |
bg = (d->charcells[i+base + 1] >> 4) & 7; |
425 |
|
426 |
/* Blink is hard to do :-), but inversion might be ok too: */ |
427 |
if (d->charcells[i+base + 1] & 128) { |
428 |
int tmp = fg; fg = bg; bg = tmp; |
429 |
} |
430 |
|
431 |
x = (i/2) % d->max_x; x *= font_width; |
432 |
y = (i/2) / d->max_x; y *= font_size; |
433 |
|
434 |
/* Draw the character: */ |
435 |
for (line = 0; line < font_size; line++) { |
436 |
/* hardcoded for max 8 scaleup... :-) */ |
437 |
unsigned char rgb_line[3 * 8 * 8]; |
438 |
int iy; |
439 |
|
440 |
for (subx = 0; subx < font_width; subx++) { |
441 |
int ix, color_index; |
442 |
|
443 |
if (d->use_palette_per_line) { |
444 |
int sline = d->pixel_repy * (line+y); |
445 |
if (sline < MAX_RETRACE_SCANLINES) |
446 |
pal = d->retrace_palette |
447 |
+ sline * 256*3; |
448 |
else |
449 |
pal = d->fb->rgb_palette; |
450 |
} |
451 |
|
452 |
if (d->font[ch * font_size + line] & |
453 |
(128 >> subx)) |
454 |
color_index = fg; |
455 |
else |
456 |
color_index = bg; |
457 |
|
458 |
for (ix=0; ix<d->pixel_repx; ix++) |
459 |
memcpy(rgb_line + (subx*d->pixel_repx + |
460 |
ix) * 3, &pal[color_index * 3], 3); |
461 |
} |
462 |
|
463 |
for (iy=0; iy<d->pixel_repy; iy++) { |
464 |
uint32_t addr = (d->fb_max_x * (d->pixel_repy * |
465 |
(line+y) + iy) + x * d->pixel_repx) * 3; |
466 |
if (addr >= d->fb_size) |
467 |
continue; |
468 |
dev_fb_access(machine->cpus[0], |
469 |
machine->memory, addr, rgb_line, |
470 |
3 * font_width, MEM_WRITE, d->fb); |
471 |
} |
472 |
} |
473 |
} |
474 |
} |
475 |
|
476 |
|
477 |
/* |
478 |
* vga_update_cursor(): |
479 |
*/ |
480 |
static void vga_update_cursor(struct machine *machine, struct vga_data *d) |
481 |
{ |
482 |
int onoff = 1, height = d->crtc_reg[VGA_CRTC_CURSOR_SCANLINE_END] |
483 |
- d->crtc_reg[VGA_CRTC_CURSOR_SCANLINE_START] + 1; |
484 |
|
485 |
if (d->cur_mode != MODE_CHARCELL) |
486 |
onoff = 0; |
487 |
|
488 |
if (d->crtc_reg[VGA_CRTC_CURSOR_SCANLINE_START] > |
489 |
d->crtc_reg[VGA_CRTC_CURSOR_SCANLINE_END]) { |
490 |
onoff = 0; |
491 |
height = 1; |
492 |
} |
493 |
|
494 |
if (d->crtc_reg[VGA_CRTC_CURSOR_SCANLINE_START] >= d->font_height) |
495 |
onoff = 0; |
496 |
|
497 |
dev_fb_setcursor(d->fb, |
498 |
d->cursor_x * d->font_width * d->pixel_repx, (d->cursor_y * |
499 |
d->font_height + d->crtc_reg[VGA_CRTC_CURSOR_SCANLINE_START]) * |
500 |
d->pixel_repy, onoff, d->font_width * d->pixel_repx, height * |
501 |
d->pixel_repy); |
502 |
} |
503 |
|
504 |
|
505 |
/* |
506 |
* dev_vga_tick(): |
507 |
*/ |
508 |
void dev_vga_tick(struct cpu *cpu, void *extra) |
509 |
{ |
510 |
struct vga_data *d = extra; |
511 |
int64_t low = -1, high; |
512 |
|
513 |
vga_update_cursor(cpu->machine, d); |
514 |
|
515 |
/* TODO: text vs graphics tick? */ |
516 |
memory_device_dyntrans_access(cpu, cpu->mem, extra, |
517 |
(uint64_t *) &low, (uint64_t *) &high); |
518 |
|
519 |
if (low != -1) { |
520 |
int base = ((d->crtc_reg[VGA_CRTC_START_ADDR_HIGH] << 8) |
521 |
+ d->crtc_reg[VGA_CRTC_START_ADDR_LOW]) * 2; |
522 |
int new_u_y1, new_u_y2; |
523 |
debug("[ dev_vga_tick: dyntrans access, %llx .. %llx ]\n", |
524 |
(long long)low, (long long)high); |
525 |
low -= base; |
526 |
high -= base; |
527 |
d->update_x1 = 0; |
528 |
d->update_x2 = d->max_x - 1; |
529 |
new_u_y1 = (low/2) / d->max_x; |
530 |
new_u_y2 = ((high/2) / d->max_x) + 1; |
531 |
if (new_u_y1 < d->update_y1) |
532 |
d->update_y1 = new_u_y1; |
533 |
if (new_u_y2 > d->update_y2) |
534 |
d->update_y2 = new_u_y2; |
535 |
if (d->update_y1 < 0) |
536 |
d->update_y1 = 0; |
537 |
if (d->update_y2 >= d->max_y) |
538 |
d->update_y2 = d->max_y - 1; |
539 |
d->modified = 1; |
540 |
} |
541 |
|
542 |
if (d->n_is1_reads > N_IS1_READ_THRESHOLD && |
543 |
d->retrace_palette != NULL) { |
544 |
d->use_palette_per_line = 1; |
545 |
d->update_x1 = 0; |
546 |
d->update_x2 = d->max_x - 1; |
547 |
d->update_y1 = 0; |
548 |
d->update_y2 = d->max_y - 1; |
549 |
d->modified = 1; |
550 |
} else { |
551 |
if (d->use_palette_per_line) { |
552 |
d->use_palette_per_line = 0; |
553 |
d->update_x1 = 0; |
554 |
d->update_x2 = d->max_x - 1; |
555 |
d->update_y1 = 0; |
556 |
d->update_y2 = d->max_y - 1; |
557 |
d->modified = 1; |
558 |
} |
559 |
} |
560 |
|
561 |
if (!cpu->machine->use_x11) { |
562 |
/* NOTE: 2 > 0, so this only updates the cursor, no |
563 |
character cells. */ |
564 |
vga_update_textmode(cpu->machine, d, 0, 2, 0); |
565 |
} |
566 |
|
567 |
if (d->modified) { |
568 |
if (d->cur_mode == MODE_CHARCELL) |
569 |
vga_update_text(cpu->machine, d, d->update_x1, |
570 |
d->update_y1, d->update_x2, d->update_y2); |
571 |
else |
572 |
vga_update_graphics(cpu->machine, d, d->update_x1, |
573 |
d->update_y1, d->update_x2, d->update_y2); |
574 |
|
575 |
d->palette_modified = 0; |
576 |
d->modified = 0; |
577 |
d->update_x1 = 999999; |
578 |
d->update_x2 = -1; |
579 |
d->update_y1 = 999999; |
580 |
d->update_y2 = -1; |
581 |
} |
582 |
|
583 |
if (d->n_is1_reads > N_IS1_READ_THRESHOLD) |
584 |
d->n_is1_reads = 0; |
585 |
} |
586 |
|
587 |
|
588 |
/* |
589 |
* vga_graphics_access(): |
590 |
* |
591 |
* Reads and writes to the VGA video memory (pixels). |
592 |
*/ |
593 |
DEVICE_ACCESS(vga_graphics) |
594 |
{ |
595 |
struct vga_data *d = extra; |
596 |
int j, x=0, y=0, x2=0, y2=0, modified = 0; |
597 |
size_t i; |
598 |
|
599 |
if (relative_addr + len >= GFX_ADDR_WINDOW) |
600 |
return 0; |
601 |
|
602 |
if (d->cur_mode != MODE_GRAPHICS) |
603 |
return 1; |
604 |
|
605 |
switch (d->graphics_mode) { |
606 |
case GRAPHICS_MODE_8BIT: |
607 |
y = relative_addr / d->max_x; |
608 |
x = relative_addr % d->max_x; |
609 |
y2 = (relative_addr+len-1) / d->max_x; |
610 |
x2 = (relative_addr+len-1) % d->max_x; |
611 |
|
612 |
if (writeflag == MEM_WRITE) { |
613 |
memcpy(d->gfx_mem + relative_addr, data, len); |
614 |
modified = 1; |
615 |
} else |
616 |
memcpy(data, d->gfx_mem + relative_addr, len); |
617 |
break; |
618 |
case GRAPHICS_MODE_4BIT: |
619 |
y = relative_addr * 8 / d->max_x; |
620 |
x = relative_addr * 8 % d->max_x; |
621 |
y2 = ((relative_addr+len)*8-1) / d->max_x; |
622 |
x2 = ((relative_addr+len)*8-1) % d->max_x; |
623 |
/* TODO: color stuff */ |
624 |
|
625 |
/* Read/write d->gfx_mem in 4-bit color: */ |
626 |
if (writeflag == MEM_WRITE) { |
627 |
/* i is byte index to write, j is bit index */ |
628 |
for (i=0; i<len; i++) |
629 |
for (j=0; j<8; j++) { |
630 |
int pixelmask = 1 << (7-j); |
631 |
int b = data[i] & pixelmask; |
632 |
int m = d->sequencer_reg[ |
633 |
VGA_SEQ_MAP_MASK] & 0x0f; |
634 |
uint32_t addr = (y * d->max_x + x + |
635 |
i*8 + j) * d->bits_per_pixel / 8; |
636 |
unsigned char byte; |
637 |
if (!(d->graphcontr_reg[ |
638 |
VGA_GRAPHCONTR_MASK] & pixelmask)) |
639 |
continue; |
640 |
if (addr >= d->gfx_mem_size) |
641 |
continue; |
642 |
byte = d->gfx_mem[addr]; |
643 |
if (b && j&1) |
644 |
byte |= m << 4; |
645 |
if (b && !(j&1)) |
646 |
byte |= m; |
647 |
if (!b && j&1) |
648 |
byte &= ~(m << 4); |
649 |
if (!b && !(j&1)) |
650 |
byte &= ~m; |
651 |
d->gfx_mem[addr] = byte; |
652 |
} |
653 |
modified = 1; |
654 |
} else { |
655 |
fatal("TODO: 4 bit graphics read, mask=0x%02x\n", |
656 |
d->sequencer_reg[VGA_SEQ_MAP_MASK]); |
657 |
for (i=0; i<len; i++) |
658 |
data[i] = random(); |
659 |
} |
660 |
break; |
661 |
default:fatal("dev_vga: Unimplemented graphics mode %i\n", |
662 |
d->graphics_mode); |
663 |
cpu->running = 0; |
664 |
} |
665 |
|
666 |
if (modified) { |
667 |
d->modified = 1; |
668 |
if (x < d->update_x1) d->update_x1 = x; |
669 |
if (x > d->update_x2) d->update_x2 = x; |
670 |
if (y < d->update_y1) d->update_y1 = y; |
671 |
if (y > d->update_y2) d->update_y2 = y; |
672 |
if (x2 < d->update_x1) d->update_x1 = x2; |
673 |
if (x2 > d->update_x2) d->update_x2 = x2; |
674 |
if (y2 < d->update_y1) d->update_y1 = y2; |
675 |
if (y2 > d->update_y2) d->update_y2 = y2; |
676 |
if (y != y2) { |
677 |
d->update_x1 = 0; |
678 |
d->update_x2 = d->max_x - 1; |
679 |
} |
680 |
} |
681 |
return 1; |
682 |
} |
683 |
|
684 |
|
685 |
/* |
686 |
* dev_vga_access(): |
687 |
* |
688 |
* Reads and writes to the VGA video memory (charcells). |
689 |
*/ |
690 |
DEVICE_ACCESS(vga) |
691 |
{ |
692 |
struct vga_data *d = extra; |
693 |
uint64_t idata = 0, odata = 0; |
694 |
int x, y, x2, y2, r, base; |
695 |
size_t i; |
696 |
|
697 |
if (writeflag == MEM_WRITE) |
698 |
idata = memory_readmax64(cpu, data, len); |
699 |
|
700 |
base = ((d->crtc_reg[VGA_CRTC_START_ADDR_HIGH] << 8) |
701 |
+ d->crtc_reg[VGA_CRTC_START_ADDR_LOW]) * 2; |
702 |
r = relative_addr - base; |
703 |
y = r / (d->max_x * 2); |
704 |
x = (r/2) % d->max_x; |
705 |
y2 = (r+len-1) / (d->max_x * 2); |
706 |
x2 = ((r+len-1)/2) % d->max_x; |
707 |
|
708 |
if (relative_addr + len - 1 < d->charcells_size) { |
709 |
if (writeflag == MEM_WRITE) { |
710 |
for (i=0; i<len; i++) { |
711 |
int old = d->charcells[relative_addr + i]; |
712 |
if (old != data[i]) { |
713 |
d->charcells[relative_addr + i] = |
714 |
data[i]; |
715 |
d->modified = 1; |
716 |
} |
717 |
} |
718 |
|
719 |
if (d->modified) { |
720 |
if (x < d->update_x1) d->update_x1 = x; |
721 |
if (x > d->update_x2) d->update_x2 = x; |
722 |
if (y < d->update_y1) d->update_y1 = y; |
723 |
if (y > d->update_y2) d->update_y2 = y; |
724 |
if (x2 < d->update_x1) d->update_x1 = x2; |
725 |
if (x2 > d->update_x2) d->update_x2 = x2; |
726 |
if (y2 < d->update_y1) d->update_y1 = y2; |
727 |
if (y2 > d->update_y2) d->update_y2 = y2; |
728 |
|
729 |
if (y != y2) { |
730 |
d->update_x1 = 0; |
731 |
d->update_x2 = d->max_x - 1; |
732 |
} |
733 |
} |
734 |
} else |
735 |
memcpy(data, d->charcells + relative_addr, len); |
736 |
return 1; |
737 |
} |
738 |
|
739 |
switch (relative_addr) { |
740 |
default: |
741 |
if (writeflag==MEM_READ) { |
742 |
debug("[ vga: read from 0x%08lx ]\n", |
743 |
(long)relative_addr); |
744 |
} else { |
745 |
debug("[ vga: write to 0x%08lx: 0x%08x ]\n", |
746 |
(long)relative_addr, idata); |
747 |
} |
748 |
} |
749 |
|
750 |
if (writeflag == MEM_READ) |
751 |
memory_writemax64(cpu, data, len, odata); |
752 |
|
753 |
return 1; |
754 |
} |
755 |
|
756 |
|
757 |
/* |
758 |
* vga_crtc_reg_write(): |
759 |
* |
760 |
* Writes to VGA CRTC registers. |
761 |
*/ |
762 |
static void vga_crtc_reg_write(struct machine *machine, struct vga_data *d, |
763 |
int regnr, int idata) |
764 |
{ |
765 |
int grayscale; |
766 |
|
767 |
switch (regnr) { |
768 |
case VGA_CRTC_CURSOR_SCANLINE_START: /* 0x0a */ |
769 |
case VGA_CRTC_CURSOR_SCANLINE_END: /* 0x0b */ |
770 |
break; |
771 |
case VGA_CRTC_START_ADDR_HIGH: /* 0x0c */ |
772 |
case VGA_CRTC_START_ADDR_LOW: /* 0x0d */ |
773 |
d->update_x1 = 0; |
774 |
d->update_x2 = d->max_x - 1; |
775 |
d->update_y1 = 0; |
776 |
d->update_y2 = d->max_y - 1; |
777 |
d->modified = 1; |
778 |
recalc_cursor_position(d); |
779 |
break; |
780 |
case VGA_CRTC_CURSOR_LOCATION_HIGH: /* 0x0e */ |
781 |
case VGA_CRTC_CURSOR_LOCATION_LOW: /* 0x0f */ |
782 |
recalc_cursor_position(d); |
783 |
break; |
784 |
case 0xff: |
785 |
grayscale = 0; |
786 |
switch (d->crtc_reg[0xff]) { |
787 |
case 0x00: |
788 |
grayscale = 1; |
789 |
case 0x01: |
790 |
d->cur_mode = MODE_CHARCELL; |
791 |
d->max_x = 40; d->max_y = 25; |
792 |
d->pixel_repx = machine->x11_scaleup * 2; |
793 |
d->pixel_repy = machine->x11_scaleup; |
794 |
d->font_width = 8; |
795 |
d->font_height = 16; |
796 |
d->font = font8x16; |
797 |
break; |
798 |
case 0x02: |
799 |
grayscale = 1; |
800 |
case 0x03: |
801 |
d->cur_mode = MODE_CHARCELL; |
802 |
d->max_x = 80; d->max_y = 25; |
803 |
d->pixel_repx = d->pixel_repy = machine->x11_scaleup; |
804 |
d->font_width = 8; |
805 |
d->font_height = 16; |
806 |
d->font = font8x16; |
807 |
break; |
808 |
case 0x08: |
809 |
d->cur_mode = MODE_GRAPHICS; |
810 |
d->max_x = 160; d->max_y = 200; |
811 |
d->graphics_mode = GRAPHICS_MODE_4BIT; |
812 |
d->bits_per_pixel = 4; |
813 |
d->pixel_repx = 4 * machine->x11_scaleup; |
814 |
d->pixel_repy = 2 * machine->x11_scaleup; |
815 |
break; |
816 |
case 0x09: |
817 |
case 0x0d: |
818 |
d->cur_mode = MODE_GRAPHICS; |
819 |
d->max_x = 320; d->max_y = 200; |
820 |
d->graphics_mode = GRAPHICS_MODE_4BIT; |
821 |
d->bits_per_pixel = 4; |
822 |
d->pixel_repx = d->pixel_repy = |
823 |
2 * machine->x11_scaleup; |
824 |
break; |
825 |
case 0x0e: |
826 |
d->cur_mode = MODE_GRAPHICS; |
827 |
d->max_x = 640; d->max_y = 200; |
828 |
d->graphics_mode = GRAPHICS_MODE_4BIT; |
829 |
d->bits_per_pixel = 4; |
830 |
d->pixel_repx = machine->x11_scaleup; |
831 |
d->pixel_repy = machine->x11_scaleup * 2; |
832 |
break; |
833 |
case 0x10: |
834 |
d->cur_mode = MODE_GRAPHICS; |
835 |
d->max_x = 640; d->max_y = 350; |
836 |
d->graphics_mode = GRAPHICS_MODE_4BIT; |
837 |
d->bits_per_pixel = 4; |
838 |
d->pixel_repx = d->pixel_repy = machine->x11_scaleup; |
839 |
break; |
840 |
case 0x12: |
841 |
d->cur_mode = MODE_GRAPHICS; |
842 |
d->max_x = 640; d->max_y = 480; |
843 |
d->graphics_mode = GRAPHICS_MODE_4BIT; |
844 |
d->bits_per_pixel = 4; |
845 |
d->pixel_repx = d->pixel_repy = machine->x11_scaleup; |
846 |
break; |
847 |
case 0x13: |
848 |
d->cur_mode = MODE_GRAPHICS; |
849 |
d->max_x = 320; d->max_y = 200; |
850 |
d->graphics_mode = GRAPHICS_MODE_8BIT; |
851 |
d->bits_per_pixel = 8; |
852 |
d->pixel_repx = d->pixel_repy = |
853 |
2 * machine->x11_scaleup; |
854 |
break; |
855 |
default: |
856 |
fatal("TODO! video mode change hack (mode 0x%02x)\n", |
857 |
d->crtc_reg[0xff]); |
858 |
exit(1); |
859 |
} |
860 |
|
861 |
if (d->cur_mode == MODE_CHARCELL) { |
862 |
dev_fb_resize(d->fb, d->max_x * d->font_width * |
863 |
d->pixel_repx, d->max_y * d->font_height * |
864 |
d->pixel_repy); |
865 |
d->fb_size = d->max_x * d->pixel_repx * d->font_width * |
866 |
d->max_y * d->pixel_repy * d->font_height * 3; |
867 |
} else { |
868 |
dev_fb_resize(d->fb, d->max_x * d->pixel_repx, |
869 |
d->max_y * d->pixel_repy); |
870 |
d->fb_size = d->max_x * d->pixel_repx * |
871 |
d->max_y * d->pixel_repy * 3; |
872 |
} |
873 |
|
874 |
if (d->gfx_mem != NULL) |
875 |
free(d->gfx_mem); |
876 |
d->gfx_mem_size = 1; |
877 |
if (d->cur_mode == MODE_GRAPHICS) |
878 |
d->gfx_mem_size = d->max_x * d->max_y / |
879 |
(d->graphics_mode == GRAPHICS_MODE_8BIT? 1 : 2); |
880 |
d->gfx_mem = malloc(d->gfx_mem_size); |
881 |
|
882 |
/* Clear screen and reset the palette: */ |
883 |
memset(d->charcells_outputed, 0, d->charcells_size); |
884 |
memset(d->charcells_drawn, 0, d->charcells_size); |
885 |
memset(d->gfx_mem, 0, d->gfx_mem_size); |
886 |
d->update_x1 = 0; |
887 |
d->update_x2 = d->max_x - 1; |
888 |
d->update_y1 = 0; |
889 |
d->update_y2 = d->max_y - 1; |
890 |
d->modified = 1; |
891 |
reset_palette(d, grayscale); |
892 |
register_reset(d); |
893 |
break; |
894 |
default:fatal("[ vga_crtc_reg_write: regnr=0x%02x idata=0x%02x ]\n", |
895 |
regnr, idata); |
896 |
} |
897 |
} |
898 |
|
899 |
|
900 |
/* |
901 |
* vga_sequencer_reg_write(): |
902 |
* |
903 |
* Writes to VGA Sequencer registers. |
904 |
*/ |
905 |
static void vga_sequencer_reg_write(struct machine *machine, struct vga_data *d, |
906 |
int regnr, int idata) |
907 |
{ |
908 |
switch (regnr) { |
909 |
case VGA_SEQ_RESET: |
910 |
case VGA_SEQ_MAP_MASK: |
911 |
case VGA_SEQ_SEQUENCER_MEMORY_MODE: |
912 |
debug("[ vga_sequencer_reg_write: select %i: TODO ]\n", regnr); |
913 |
break; |
914 |
default:fatal("[ vga_sequencer_reg_write: select %i ]\n", regnr); |
915 |
/* cpu->running = 0; */ |
916 |
} |
917 |
} |
918 |
|
919 |
|
920 |
/* |
921 |
* vga_graphcontr_reg_write(): |
922 |
* |
923 |
* Writes to VGA Graphics Controller registers. |
924 |
*/ |
925 |
static void vga_graphcontr_reg_write(struct machine *machine, |
926 |
struct vga_data *d, int regnr, int idata) |
927 |
{ |
928 |
switch (regnr) { |
929 |
case VGA_GRAPHCONTR_READMAPSELECT: |
930 |
case VGA_GRAPHCONTR_GRAPHICSMODE: |
931 |
case VGA_GRAPHCONTR_MISC: |
932 |
case VGA_GRAPHCONTR_MASK: |
933 |
debug("[ vga_graphcontr_reg_write: select %i: TODO ]\n", regnr); |
934 |
break; |
935 |
default:fatal("[ vga_graphcontr_reg_write: select %i ]\n", regnr); |
936 |
/* cpu->running = 0; */ |
937 |
} |
938 |
} |
939 |
|
940 |
|
941 |
/* |
942 |
* vga_attribute_reg_write(): |
943 |
* |
944 |
* Writes to VGA Attribute registers. |
945 |
*/ |
946 |
static void vga_attribute_reg_write(struct machine *machine, struct vga_data *d, |
947 |
int regnr, int idata) |
948 |
{ |
949 |
/* 0-15 are palette registers: TODO */ |
950 |
if (regnr >= 0 && regnr <= 0xf) |
951 |
return; |
952 |
|
953 |
switch (regnr) { |
954 |
default:fatal("[ vga_attribute_reg_write: select %i ]\n", regnr); |
955 |
/* cpu->running = 0; */ |
956 |
} |
957 |
} |
958 |
|
959 |
|
960 |
/* |
961 |
* dev_vga_ctrl_access(): |
962 |
* |
963 |
* Reads and writes of the VGA control registers. |
964 |
*/ |
965 |
DEVICE_ACCESS(vga_ctrl) |
966 |
{ |
967 |
struct vga_data *d = extra; |
968 |
size_t i; |
969 |
uint64_t idata = 0, odata = 0; |
970 |
|
971 |
for (i=0; i<len; i++) { |
972 |
idata = data[i]; |
973 |
|
974 |
/* 0x3C0 + relative_addr... */ |
975 |
|
976 |
switch (relative_addr) { |
977 |
|
978 |
case VGA_ATTRIBUTE_ADDR: /* 0x00 */ |
979 |
switch (d->attribute_state) { |
980 |
case 0: if (writeflag == MEM_READ) |
981 |
odata = d->attribute_reg_select; |
982 |
else { |
983 |
d->attribute_reg_select = 1; |
984 |
d->attribute_state = 1; |
985 |
} |
986 |
break; |
987 |
case 1: d->attribute_state = 0; |
988 |
d->attribute_reg[d->attribute_reg_select] = |
989 |
idata; |
990 |
vga_attribute_reg_write(cpu->machine, d, |
991 |
d->attribute_reg_select, idata); |
992 |
break; |
993 |
} |
994 |
break; |
995 |
case VGA_ATTRIBUTE_DATA_READ: /* 0x01 */ |
996 |
if (writeflag == MEM_WRITE) |
997 |
fatal("[ dev_vga: WARNING: Write to " |
998 |
"VGA_ATTRIBUTE_DATA_READ? ]\n"); |
999 |
else { |
1000 |
if (d->attribute_state == 0) |
1001 |
fatal("[ dev_vga: WARNING: Read from " |
1002 |
"VGA_ATTRIBUTE_DATA_READ, but no" |
1003 |
" register selected? ]\n"); |
1004 |
else |
1005 |
odata = d->attribute_reg[ |
1006 |
d->attribute_reg_select]; |
1007 |
} |
1008 |
break; |
1009 |
|
1010 |
case VGA_MISC_OUTPUT_W: /* 0x02 */ |
1011 |
if (writeflag == MEM_WRITE) |
1012 |
d->misc_output_reg = idata; |
1013 |
else { |
1014 |
/* Reads: Input Status 0 */ |
1015 |
odata = 0x00; |
1016 |
} |
1017 |
break; |
1018 |
|
1019 |
case VGA_SEQUENCER_ADDR: /* 0x04 */ |
1020 |
if (writeflag == MEM_READ) |
1021 |
odata = d->sequencer_reg_select; |
1022 |
else |
1023 |
d->sequencer_reg_select = idata; |
1024 |
break; |
1025 |
case VGA_SEQUENCER_DATA: /* 0x05 */ |
1026 |
if (writeflag == MEM_READ) |
1027 |
odata = d->sequencer_reg[ |
1028 |
d->sequencer_reg_select]; |
1029 |
else { |
1030 |
d->sequencer_reg[d-> |
1031 |
sequencer_reg_select] = idata; |
1032 |
vga_sequencer_reg_write(cpu->machine, d, |
1033 |
d->sequencer_reg_select, idata); |
1034 |
} |
1035 |
break; |
1036 |
|
1037 |
case VGA_DAC_ADDR_READ: /* 0x07 */ |
1038 |
if (writeflag == MEM_WRITE) { |
1039 |
d->palette_read_index = idata; |
1040 |
d->palette_read_subindex = 0; |
1041 |
} else { |
1042 |
debug("[ dev_vga: WARNING: Read from " |
1043 |
"VGA_DAC_ADDR_READ? TODO ]\n"); |
1044 |
/* TODO */ |
1045 |
} |
1046 |
break; |
1047 |
case VGA_DAC_ADDR_WRITE: /* 0x08 */ |
1048 |
if (writeflag == MEM_WRITE) { |
1049 |
d->palette_write_index = idata; |
1050 |
d->palette_write_subindex = 0; |
1051 |
|
1052 |
/* TODO: Is this correct? */ |
1053 |
d->palette_read_index = idata; |
1054 |
d->palette_read_subindex = 0; |
1055 |
} else { |
1056 |
fatal("[ dev_vga: WARNING: Read from " |
1057 |
"VGA_DAC_ADDR_WRITE? ]\n"); |
1058 |
odata = d->palette_write_index; |
1059 |
} |
1060 |
break; |
1061 |
case VGA_DAC_DATA: /* 0x09 */ |
1062 |
if (writeflag == MEM_WRITE) { |
1063 |
int new = (idata & 63) << 2; |
1064 |
int old = d->fb->rgb_palette[d-> |
1065 |
palette_write_index*3+d-> |
1066 |
palette_write_subindex]; |
1067 |
d->fb->rgb_palette[d->palette_write_index * 3 + |
1068 |
d->palette_write_subindex] = new; |
1069 |
/* Redraw whole screen, if the |
1070 |
palette changed: */ |
1071 |
if (new != old) { |
1072 |
d->modified = 1; |
1073 |
d->palette_modified = 1; |
1074 |
d->update_x1 = d->update_y1 = 0; |
1075 |
d->update_x2 = d->max_x - 1; |
1076 |
d->update_y2 = d->max_y - 1; |
1077 |
} |
1078 |
d->palette_write_subindex ++; |
1079 |
if (d->palette_write_subindex == 3) { |
1080 |
d->palette_write_index ++; |
1081 |
d->palette_write_subindex = 0; |
1082 |
} |
1083 |
} else { |
1084 |
odata = (d->fb->rgb_palette[d-> |
1085 |
palette_read_index * 3 + |
1086 |
d->palette_read_subindex] >> 2) & 63; |
1087 |
d->palette_read_subindex ++; |
1088 |
if (d->palette_read_subindex == 3) { |
1089 |
d->palette_read_index ++; |
1090 |
d->palette_read_subindex = 0; |
1091 |
} |
1092 |
} |
1093 |
break; |
1094 |
|
1095 |
case VGA_MISC_OUTPUT_R: |
1096 |
odata = d->misc_output_reg; |
1097 |
break; |
1098 |
|
1099 |
case VGA_GRAPHCONTR_ADDR: /* 0x0e */ |
1100 |
if (writeflag == MEM_READ) |
1101 |
odata = d->graphcontr_reg_select; |
1102 |
else |
1103 |
d->graphcontr_reg_select = idata; |
1104 |
break; |
1105 |
case VGA_GRAPHCONTR_DATA: /* 0x0f */ |
1106 |
if (writeflag == MEM_READ) |
1107 |
odata = d->graphcontr_reg[ |
1108 |
d->graphcontr_reg_select]; |
1109 |
else { |
1110 |
d->graphcontr_reg[d-> |
1111 |
graphcontr_reg_select] = idata; |
1112 |
vga_graphcontr_reg_write(cpu->machine, d, |
1113 |
d->graphcontr_reg_select, idata); |
1114 |
} |
1115 |
break; |
1116 |
|
1117 |
case VGA_CRTC_ADDR: /* 0x14 */ |
1118 |
if (writeflag == MEM_READ) |
1119 |
odata = d->crtc_reg_select; |
1120 |
else |
1121 |
d->crtc_reg_select = idata; |
1122 |
break; |
1123 |
case VGA_CRTC_DATA: /* 0x15 */ |
1124 |
if (writeflag == MEM_READ) |
1125 |
odata = d->crtc_reg[d->crtc_reg_select]; |
1126 |
else { |
1127 |
d->crtc_reg[d->crtc_reg_select] = idata; |
1128 |
vga_crtc_reg_write(cpu->machine, d, |
1129 |
d->crtc_reg_select, idata); |
1130 |
} |
1131 |
break; |
1132 |
|
1133 |
case VGA_INPUT_STATUS_1: /* 0x1A */ |
1134 |
odata = 0; |
1135 |
d->n_is1_reads ++; |
1136 |
d->current_retrace_line ++; |
1137 |
d->current_retrace_line %= (MAX_RETRACE_SCANLINES * 8); |
1138 |
/* Whenever we are "inside" a scan line, copy the |
1139 |
current palette into retrace_palette[][]: */ |
1140 |
if ((d->current_retrace_line & 7) == 7) { |
1141 |
if (d->retrace_palette == NULL && |
1142 |
d->n_is1_reads > N_IS1_READ_THRESHOLD) { |
1143 |
d->retrace_palette = malloc( |
1144 |
MAX_RETRACE_SCANLINES * 256*3); |
1145 |
if (d->retrace_palette == NULL) { |
1146 |
fatal("out of memory\n"); |
1147 |
exit(1); |
1148 |
} |
1149 |
} |
1150 |
if (d->retrace_palette != NULL) |
1151 |
memcpy(d->retrace_palette + (d-> |
1152 |
current_retrace_line >> 3) * 256*3, |
1153 |
d->fb->rgb_palette, d->cur_mode == |
1154 |
MODE_CHARCELL? (16*3) : (256*3)); |
1155 |
} |
1156 |
/* These need to go on and off, to fake the |
1157 |
real vertical and horizontal retrace info. */ |
1158 |
if (d->current_retrace_line < 20*8) |
1159 |
odata |= VGA_IS1_DISPLAY_VRETRACE; |
1160 |
else { |
1161 |
if ((d->current_retrace_line & 7) == 0) |
1162 |
odata = VGA_IS1_DISPLAY_DISPLAY_DISABLE; |
1163 |
} |
1164 |
break; |
1165 |
|
1166 |
default: |
1167 |
if (writeflag==MEM_READ) { |
1168 |
debug("[ vga_ctrl: read from 0x%08lx ]\n", |
1169 |
(long)relative_addr); |
1170 |
} else { |
1171 |
debug("[ vga_ctrl: write to 0x%08lx: 0x%08x" |
1172 |
" ]\n", (long)relative_addr, (int)idata); |
1173 |
} |
1174 |
} |
1175 |
|
1176 |
if (writeflag == MEM_READ) |
1177 |
data[i] = odata; |
1178 |
|
1179 |
/* For multi-byte accesses: */ |
1180 |
relative_addr ++; |
1181 |
} |
1182 |
|
1183 |
return 1; |
1184 |
} |
1185 |
|
1186 |
|
1187 |
/* |
1188 |
* dev_vga_init(): |
1189 |
* |
1190 |
* Register a VGA text console device. max_x and max_y could be something |
1191 |
* like 80 and 25, respectively. |
1192 |
*/ |
1193 |
void dev_vga_init(struct machine *machine, struct memory *mem, |
1194 |
uint64_t videomem_base, uint64_t control_base, char *name) |
1195 |
{ |
1196 |
struct vga_data *d; |
1197 |
size_t i; |
1198 |
size_t allocsize; |
1199 |
|
1200 |
d = malloc(sizeof(struct vga_data)); |
1201 |
if (d == NULL) { |
1202 |
fprintf(stderr, "out of memory\n"); |
1203 |
exit(1); |
1204 |
} |
1205 |
memset(d, 0, sizeof(struct vga_data)); |
1206 |
|
1207 |
d->console_handle = console_start_slave(machine, "vga", |
1208 |
CONSOLE_OUTPUT_ONLY); |
1209 |
|
1210 |
d->videomem_base = videomem_base; |
1211 |
d->control_base = control_base; |
1212 |
d->max_x = 80; |
1213 |
d->max_y = 25; |
1214 |
d->cur_mode = MODE_CHARCELL; |
1215 |
d->crtc_reg[0xff] = 0x03; |
1216 |
d->charcells_size = 0x8000; |
1217 |
d->gfx_mem_size = 1; /* Nothing, as we start in text mode */ |
1218 |
d->pixel_repx = d->pixel_repy = machine->x11_scaleup; |
1219 |
|
1220 |
/* Allocate in full pages, to make it possible to use bintrans: */ |
1221 |
allocsize = ((d->charcells_size-1) | (machine->arch_pagesize-1)) + 1; |
1222 |
d->charcells = malloc(d->charcells_size); |
1223 |
d->charcells_outputed = malloc(d->charcells_size); |
1224 |
d->charcells_drawn = malloc(d->charcells_size); |
1225 |
d->gfx_mem = malloc(d->gfx_mem_size); |
1226 |
if (d->charcells == NULL || d->charcells_outputed == NULL || |
1227 |
d->charcells_drawn == NULL || d->gfx_mem == NULL) { |
1228 |
fprintf(stderr, "out of memory in dev_vga_init()\n"); |
1229 |
exit(1); |
1230 |
} |
1231 |
|
1232 |
memset(d->charcells_drawn, 0, d->charcells_size); |
1233 |
|
1234 |
for (i=0; i<d->charcells_size; i+=2) { |
1235 |
d->charcells[i] = ' '; |
1236 |
d->charcells[i+1] = 0x07; /* Default color */ |
1237 |
d->charcells_drawn[i] = ' '; |
1238 |
d->charcells_drawn[i+1] = 0x07; |
1239 |
} |
1240 |
|
1241 |
memset(d->charcells_outputed, 0, d->charcells_size); |
1242 |
memset(d->gfx_mem, 0, d->gfx_mem_size); |
1243 |
|
1244 |
d->font = font8x16; |
1245 |
d->font_width = 8; |
1246 |
d->font_height = 16; |
1247 |
|
1248 |
d->fb_max_x = d->pixel_repx * d->max_x; |
1249 |
d->fb_max_y = d->pixel_repy * d->max_y; |
1250 |
if (d->cur_mode == MODE_CHARCELL) { |
1251 |
d->fb_max_x *= d->font_width; |
1252 |
d->fb_max_y *= d->font_height; |
1253 |
} |
1254 |
|
1255 |
memory_device_register(mem, "vga_charcells", videomem_base + 0x18000, |
1256 |
allocsize, dev_vga_access, d, DM_DYNTRANS_OK | |
1257 |
DM_DYNTRANS_WRITE_OK | DM_READS_HAVE_NO_SIDE_EFFECTS, |
1258 |
d->charcells); |
1259 |
memory_device_register(mem, "vga_gfx", videomem_base, GFX_ADDR_WINDOW, |
1260 |
dev_vga_graphics_access, d, DM_DEFAULT | |
1261 |
DM_READS_HAVE_NO_SIDE_EFFECTS, d->gfx_mem); |
1262 |
memory_device_register(mem, "vga_ctrl", control_base, |
1263 |
32, dev_vga_ctrl_access, d, DM_DEFAULT, NULL); |
1264 |
|
1265 |
d->fb = dev_fb_init(machine, mem, VGA_FB_ADDR, VFB_GENERIC, |
1266 |
d->fb_max_x, d->fb_max_y, d->fb_max_x, d->fb_max_y, 24, "VGA"); |
1267 |
d->fb_size = d->fb_max_x * d->fb_max_y * 3; |
1268 |
|
1269 |
reset_palette(d, 0); |
1270 |
|
1271 |
/* This will force an initial redraw/resynch: */ |
1272 |
d->update_x1 = 0; |
1273 |
d->update_x2 = d->max_x - 1; |
1274 |
d->update_y1 = 0; |
1275 |
d->update_y2 = d->max_y - 1; |
1276 |
d->modified = 1; |
1277 |
|
1278 |
machine_add_tickfunction(machine, dev_vga_tick, d, VGA_TICK_SHIFT); |
1279 |
|
1280 |
register_reset(d); |
1281 |
|
1282 |
vga_update_cursor(machine, d); |
1283 |
} |
1284 |
|