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dpavlin |
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/* |
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* Copyright (C) 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_dreamcast_maple.c,v 1.9 2006/10/31 08:27:26 debug Exp $ |
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* |
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* Dreamcast "Maple" bus controller. |
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* |
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* The Maple bus has 4 ports (A-D), and each port has up to 6 possible "units" |
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* (where unit 0 is the main unit). Communication is done using DMA; each |
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* DMA transfer sends one or more requests, and for each of these requests |
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* a response is generated (or a timeout if there was no device at the |
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* specific port). |
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* |
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* See Marcus Comstedt's page (http://mc.pp.se/dc/maplebus.html) for more |
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* details about the DMA request/responses. |
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* |
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* |
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* TODO: |
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* Unit numbers / IDs for real Maple devices. |
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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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#include <sys/time.h> |
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#include "console.h" |
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#include "cpu.h" |
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#include "device.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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#include "dreamcast_maple.h" |
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#include "dreamcast_sysasicvar.h" |
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#define debug fatal |
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#define N_MAPLE_PORTS 4 |
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#define MAX_CHARS 8192 |
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#define MAX_CONTROLLER_DATA 4096 |
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#define MAPLE_TICK_SHIFT 17 |
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struct maple_device { |
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struct maple_devinfo devinfo; |
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}; |
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struct dreamcast_maple_data { |
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/* Registers: */ |
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uint32_t dmaaddr; |
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int enable; |
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int timeout; |
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/* Attached devices: */ |
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struct maple_device *device[N_MAPLE_PORTS]; |
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/* For keyboard/controller input: */ |
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int console_handle; |
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uint8_t char_queue[MAX_CHARS]; |
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uint16_t controller_queue[MAX_CONTROLLER_DATA]; |
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int char_queue_head, char_queue_tail; |
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int controller_queue_head, controller_queue_tail; |
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}; |
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/* |
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* Maple devices: |
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* |
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* TODO: Figure out strings and numbers of _real_ Maple devices. |
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*/ |
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static struct maple_device maple_device_controller = { |
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{ |
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BE32_TO_HOST(MAPLE_FUNC(MAPLE_FN_CONTROLLER)), /* di_func */ |
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{ 0,0,0 }, /* di_function_data[3] */ |
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0, /* di_area_code */ |
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0, /* di_connector_direction */ |
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"Dreamcast Controller", /* di_product_name */ |
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"di_product_license", /* di_product_license */ |
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LE16_TO_HOST(100), /* di_standby_power */ |
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LE16_TO_HOST(100) /* di_max_power */ |
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} |
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}; |
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static struct maple_device maple_device_keyboard = { |
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{ |
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BE32_TO_HOST(MAPLE_FUNC(MAPLE_FN_KEYBOARD)),/* di_func */ |
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{ LE32_TO_HOST(2),0,0 }, /* di_function_data[3] */ |
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0, /* di_area_code */ |
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0, /* di_connector_direction */ |
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"Keyboard", /* di_product_name */ |
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"di_product_license", /* di_product_license */ |
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LE16_TO_HOST(100), /* di_standby_power */ |
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LE16_TO_HOST(100) /* di_max_power */ |
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} |
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}; |
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#if 0 |
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static struct maple_device maple_device_mouse = { |
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{ |
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BE32_TO_HOST(MAPLE_FUNC(MAPLE_FN_MOUSE)),/* di_func */ |
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{ 0,0,0 }, /* di_function_data[3] */ |
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0, /* di_area_code */ |
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0, /* di_connector_direction */ |
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"Dreamcast Mouse", /* di_product_name */ |
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"di_product_license", /* di_product_license */ |
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LE16_TO_HOST(100), /* di_standby_power */ |
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LE16_TO_HOST(100) /* di_max_power */ |
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} |
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}; |
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#endif |
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DEVICE_TICK(maple) |
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{ |
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struct dreamcast_maple_data *d = (struct dreamcast_maple_data *) extra; |
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int control_bits, key = console_readchar(d->console_handle); |
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if (key < 0) |
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return; |
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/* Add to the keyboard queue: */ |
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d->char_queue[d->char_queue_head] = key; |
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d->char_queue_head = (d->char_queue_head + 1) % MAX_CHARS; |
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if (d->char_queue_head == d->char_queue_tail) |
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fatal("[ dreamcast_maple: KEYBOARD QUEUE OVERRUN! ]\n"); |
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control_bits = 0; |
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switch (key) { |
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case 'a': |
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case 'A': |
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control_bits = 0x0004; |
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break; |
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case 'b': |
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case 'B': |
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control_bits = 0x0002; |
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break; |
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case 'c': |
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case 'C': |
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control_bits = 0x0001; |
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break; |
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case 'x': |
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case 'X': |
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control_bits = 0x0400; |
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break; |
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case 'y': |
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case 'Y': |
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control_bits = 0x0200; |
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break; |
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case 'z': |
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case 'Z': |
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control_bits = 0x0100; |
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break; |
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case 's': |
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case 'S': /* Start */ |
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control_bits = 0x0008; |
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break; |
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case '8': /* up */ |
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control_bits = 0x0010; |
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break; |
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case '2': /* down */ |
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case 'k': |
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control_bits = 0x0020; |
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break; |
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case '4': /* left */ |
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case 'u': |
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control_bits = 0x0040; |
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break; |
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case '6': /* right */ |
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case 'o': |
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control_bits = 0x0080; |
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break; |
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} |
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if (control_bits != 0) { |
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/* Add to the controller queue: */ |
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d->controller_queue[d->controller_queue_head] = control_bits; |
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d->controller_queue_head = |
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(d->controller_queue_head + 1) % MAX_CONTROLLER_DATA; |
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if (d->controller_queue_head == d->controller_queue_tail) |
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fatal("[ dreamcast_maple: CONTROLLER QUEUE " |
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"OVERRUN! ]\n"); |
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} |
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} |
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static int get_key(struct dreamcast_maple_data *d) |
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{ |
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int key = d->char_queue[d->char_queue_tail]; |
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if (d->char_queue_head == d->char_queue_tail) |
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return -1; |
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d->char_queue_tail = (d->char_queue_tail + 1) % MAX_CHARS; |
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return key; |
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} |
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static int get_controller(struct dreamcast_maple_data *d) |
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{ |
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int c = d->controller_queue[d->controller_queue_tail]; |
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if (d->controller_queue_head == d->controller_queue_tail) |
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return 0; |
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d->controller_queue_tail = (d->controller_queue_tail + 1) |
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% MAX_CONTROLLER_DATA; |
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return c; |
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} |
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/* |
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* maple_getcond_controller_response(): |
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* |
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* Generate a controller response. Based on info from Marcus |
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* Comstedt's page: http://mc.pp.se/dc/controller.html |
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*/ |
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static void maple_getcond_controller_response(struct dreamcast_maple_data *d, |
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struct cpu *cpu, int port, uint32_t receive_addr) |
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{ |
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uint8_t buf[8]; |
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uint32_t response_code, transfer_code; |
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int c; |
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transfer_code = (MAPLE_RESPONSE_DATATRF << 24) | |
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(((port << 6) | 0x20) << 16) | |
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((port << 6) << 8) | |
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3 /* Transfer length in 32-bit words */; |
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transfer_code = BE32_TO_HOST(transfer_code); |
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cpu->memory_rw(cpu, cpu->mem, receive_addr, (void *) &transfer_code, |
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4, MEM_WRITE, NO_EXCEPTIONS | PHYSICAL); |
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receive_addr += 4; |
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response_code = BE32_TO_HOST(MAPLE_FUNC(MAPLE_FN_CONTROLLER)); |
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cpu->memory_rw(cpu, cpu->mem, receive_addr, (void *) &response_code, |
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4, MEM_WRITE, NO_EXCEPTIONS | PHYSICAL); |
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receive_addr += 4; |
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/* NOTE: Inverse of the buttons pressed! */ |
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c = ~get_controller(d); |
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/* |
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* buf[0..1] = little endian button bitfield |
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* buf[2] = right analogue trigger (0-255) |
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* buf[3] = left analogue trigger (0-255) |
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* buf[4] = analogue joystick X (0-255) |
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* buf[5] = analogue joystick Y (0-255) |
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* buf[6] = second analogue joystick X (0-255) |
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* buf[7] = second analogue joystick Y (0-255) |
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*/ |
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memset(buf, 0, 8); |
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buf[0] = c & 0xff; |
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buf[1] = c >> 8; |
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buf[4] = buf[5] = buf[6] = buf[7] = 0; |
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cpu->memory_rw(cpu, cpu->mem, receive_addr, (void *) &buf, 8, |
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MEM_WRITE, NO_EXCEPTIONS | PHYSICAL); |
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} |
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/* |
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* maple_getcond_keyboard_response(): |
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* |
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* Generate a keyboard key-press response. Based on info from Marcus |
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* Comstedt's page: http://mc.pp.se/dc/kbd.html |
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*/ |
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static void maple_getcond_keyboard_response(struct dreamcast_maple_data *d, |
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struct cpu *cpu, int port, uint32_t receive_addr) |
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{ |
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int key; |
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uint8_t buf[8]; |
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uint32_t response_code, transfer_code; |
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transfer_code = (MAPLE_RESPONSE_DATATRF << 24) | |
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(((port << 6) | 0x20) << 16) | |
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((port << 6) << 8) | |
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3 /* Transfer length in 32-bit words */; |
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transfer_code = BE32_TO_HOST(transfer_code); |
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cpu->memory_rw(cpu, cpu->mem, receive_addr, (void *) &transfer_code, |
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4, MEM_WRITE, NO_EXCEPTIONS | PHYSICAL); |
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receive_addr += 4; |
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response_code = BE32_TO_HOST(MAPLE_FUNC(MAPLE_FN_KEYBOARD)); |
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cpu->memory_rw(cpu, cpu->mem, receive_addr, (void *) &response_code, |
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4, MEM_WRITE, NO_EXCEPTIONS | PHYSICAL); |
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receive_addr += 4; |
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key = get_key(d); |
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/* |
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* buf[0] = shift keys (1 = ctrl, 2 = shift) |
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* buf[1] = led state |
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* buf[2] = key |
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*/ |
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memset(buf, 0, 8); |
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if (key >= 'a' && key <= 'z') buf[2] = 4 + key - 'a'; |
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if (key >= 'A' && key <= 'Z') buf[0] = 2, buf[2] = 4 + key - 'A'; |
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if (key >= 1 && key <= 26) buf[0] = 1, buf[2] = 4 + key - 1; |
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if (key >= '1' && key <= '9') buf[2] = 0x1e + key - '1'; |
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if (key == '!') buf[0] = 2, buf[2] = 0x1e; |
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if (key == '"') buf[0] = 2, buf[2] = 0x1f; |
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if (key == '#') buf[0] = 2, buf[2] = 0x20; |
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if (key == '$') buf[0] = 2, buf[2] = 0x21; |
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if (key == '%') buf[0] = 2, buf[2] = 0x22; |
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if (key == '^') buf[0] = 2, buf[2] = 0x23; |
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if (key == '&') buf[0] = 2, buf[2] = 0x24; |
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if (key == '*') buf[0] = 2, buf[2] = 0x25; |
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if (key == '(') buf[0] = 2, buf[2] = 0x26; |
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if (key == '@') buf[0] = 2, buf[2] = 0x1f; |
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if (key == '\n' || key == '\r') buf[0] = 0, buf[2] = 0x28; |
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if (key == ')') buf[0] = 2, buf[2] = 0x27; |
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if (key == '\b') buf[0] = 0, buf[2] = 0x2a; |
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if (key == '\t') buf[0] = 0, buf[2] = 0x2b; |
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if (key == ' ') buf[0] = 0, buf[2] = 0x2c; |
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if (key == '0') buf[2] = 0x27; |
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if (key == 27) buf[2] = 0x29; |
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if (key == '-') buf[2] = 0x2d; |
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if (key == '=') buf[2] = 0x2e; |
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if (key == '[') buf[2] = 0x2f; |
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if (key == '\\') buf[2] = 0x31; |
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if (key == '|') buf[2] = 0x31, buf[0] = 2; |
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if (key == ']') buf[2] = 0x32; |
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if (key == ';') buf[2] = 0x33; |
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if (key == ':') buf[2] = 0x34; |
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if (key == ',') buf[2] = 0x36; |
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if (key == '.') buf[2] = 0x37; |
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if (key == '/') buf[2] = 0x38; |
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if (key == '<') buf[2] = 0x36, buf[0] = 2; |
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if (key == '>') buf[2] = 0x37, buf[0] = 2; |
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if (key == '?') buf[2] = 0x38, buf[0] = 2; |
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if (key == '+') buf[2] = 0x57; |
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cpu->memory_rw(cpu, cpu->mem, receive_addr, (void *) &buf, 8, |
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MEM_WRITE, NO_EXCEPTIONS | PHYSICAL); |
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} |
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|
|
|
362 |
|
|
/* |
363 |
|
|
* maple_do_dma_xfer(): |
364 |
|
|
* |
365 |
|
|
* Perform a DMA transfer. enable should be 1, and dmaaddr should point to |
366 |
|
|
* the memory to transfer. |
367 |
|
|
*/ |
368 |
|
|
void maple_do_dma_xfer(struct cpu *cpu, struct dreamcast_maple_data *d) |
369 |
|
|
{ |
370 |
|
|
uint32_t addr = d->dmaaddr; |
371 |
|
|
|
372 |
|
|
if (!d->enable) { |
373 |
|
|
fatal("[ maple_do_dma_xfer: not enabled? ]\n"); |
374 |
|
|
return; |
375 |
|
|
} |
376 |
|
|
|
377 |
|
|
/* debug("[ dreamcast_maple: DMA transfer, dmaaddr = " |
378 |
|
|
"0x%08"PRIx32" ]\n", addr); */ |
379 |
|
|
|
380 |
|
|
/* |
381 |
|
|
* DMA transfers must be 32-byte aligned, according to Marcus |
382 |
|
|
* Comstedt's Maple demo program. |
383 |
|
|
*/ |
384 |
|
|
if (addr & 0x1f) { |
385 |
|
|
fatal("[ dreamcast_maple: dmaaddr 0x%08"PRIx32" is NOT" |
386 |
|
|
" 32-byte aligned; aborting ]\n", addr); |
387 |
|
|
return; |
388 |
|
|
} |
389 |
|
|
|
390 |
|
|
/* |
391 |
|
|
* Handle one or more requests/responses: |
392 |
|
|
* |
393 |
|
|
* (This is "reverse engineered" from Comstedt's maple demo program; |
394 |
|
|
* it might not be good enough to emulate how the Maple is being |
395 |
|
|
* used by other programs.) |
396 |
|
|
*/ |
397 |
|
|
for (;;) { |
398 |
|
|
uint32_t receive_addr, response_code, cond; |
399 |
|
|
int datalen, port, last_message, cmd, to, from, datalen_cmd; |
400 |
|
|
int unit; |
401 |
|
|
uint8_t buf[8]; |
402 |
|
|
|
403 |
|
|
/* Read the message' two control words: */ |
404 |
|
|
cpu->memory_rw(cpu, cpu->mem, addr, (void *) &buf, 8, MEM_READ, |
405 |
|
|
NO_EXCEPTIONS | PHYSICAL); |
406 |
|
|
addr += 8; |
407 |
|
|
|
408 |
|
|
datalen = buf[0] * sizeof(uint32_t); |
409 |
|
|
if (buf[1] & 2) { |
410 |
|
|
fatal("[ dreamcast_maple: TODO: GUN bit. ]\n"); |
411 |
|
|
/* TODO: Set some bits in A05F80C4 to indicate |
412 |
|
|
which raster position a lightgun is pointing |
413 |
|
|
at! */ |
414 |
|
|
exit(1); |
415 |
|
|
} |
416 |
|
|
port = buf[2]; |
417 |
|
|
last_message = buf[3] & 0x80; |
418 |
|
|
receive_addr = buf[4] + (buf[5] << 8) + (buf[6] << 16) |
419 |
|
|
+ (buf[7] << 24); |
420 |
|
|
|
421 |
|
|
if (receive_addr & 0xe000001f) |
422 |
|
|
fatal("[ dreamcast_maple: WARNING! receive address 0x" |
423 |
|
|
"%08"PRIx32" isn't valid! ]\n", receive_addr); |
424 |
|
|
|
425 |
|
|
/* Read the command word for this message: */ |
426 |
|
|
cpu->memory_rw(cpu, cpu->mem, addr, (void *) &buf, 4, MEM_READ, |
427 |
|
|
NO_EXCEPTIONS | PHYSICAL); |
428 |
|
|
addr += 4; |
429 |
|
|
|
430 |
|
|
cmd = buf[0]; |
431 |
|
|
to = buf[1]; |
432 |
|
|
from = buf[2]; |
433 |
|
|
datalen_cmd = buf[3]; |
434 |
|
|
|
435 |
|
|
/* Decode the unit number: */ |
436 |
|
|
unit = 0; |
437 |
|
|
switch (to & 0x3f) { |
438 |
|
|
case 0x00: |
439 |
|
|
case 0x20: unit = 0; break; |
440 |
|
|
case 0x01: unit = 1; break; |
441 |
|
|
case 0x02: unit = 2; break; |
442 |
|
|
case 0x04: unit = 3; break; |
443 |
|
|
case 0x08: unit = 4; break; |
444 |
|
|
case 0x10: unit = 5; break; |
445 |
|
|
default: fatal("[ dreamcast_maple: ERROR! multiple " |
446 |
|
|
"units? Not yet implemented. to = 0x%02x ]\n", to); |
447 |
|
|
exit(1); |
448 |
|
|
} |
449 |
|
|
|
450 |
|
|
/* debug("[ dreamcast_maple: cmd=0x%02x, port=%c, unit=%i" |
451 |
|
|
", datalen=%i words ]\n", cmd, port+'A', unit, |
452 |
|
|
datalen_cmd); */ |
453 |
|
|
|
454 |
|
|
/* |
455 |
|
|
* Handle the command: |
456 |
|
|
*/ |
457 |
|
|
switch (cmd) { |
458 |
|
|
|
459 |
|
|
case MAPLE_COMMAND_DEVINFO: |
460 |
|
|
if (d->device[port] == NULL || unit != 0) { |
461 |
|
|
/* No device present: Timeout. */ |
462 |
|
|
/* debug("[ dreamcast_maple: response=" |
463 |
|
|
"timeout ]\n"); */ |
464 |
|
|
response_code = (uint32_t) -1; |
465 |
|
|
response_code = LE32_TO_HOST(response_code); |
466 |
|
|
cpu->memory_rw(cpu, cpu->mem, receive_addr, |
467 |
|
|
(void *) &response_code, 4, MEM_WRITE, |
468 |
|
|
NO_EXCEPTIONS | PHYSICAL); |
469 |
|
|
} else { |
470 |
|
|
/* Device present: */ |
471 |
|
|
int i; |
472 |
|
|
struct maple_devinfo *di = |
473 |
|
|
&d->device[port]->devinfo; |
474 |
|
|
/* debug("[ dreamcast_maple: response=" |
475 |
|
|
"\"%s\" ]\n", di->di_product_name); */ |
476 |
|
|
response_code = MAPLE_RESPONSE_DEVINFO | |
477 |
|
|
(((port << 6) | 0x20) << 8) | |
478 |
|
|
((port << 6) << 16) | |
479 |
|
|
((sizeof(struct maple_devinfo) / |
480 |
|
|
sizeof(uint32_t)) << 24); |
481 |
|
|
response_code = LE32_TO_HOST(response_code); |
482 |
|
|
cpu->memory_rw(cpu, cpu->mem, receive_addr, |
483 |
|
|
(void *) &response_code, 4, MEM_WRITE, |
484 |
|
|
NO_EXCEPTIONS | PHYSICAL); |
485 |
|
|
for (i=0; i<sizeof(struct maple_devinfo); i++) |
486 |
|
|
cpu->memory_rw(cpu, cpu->mem, |
487 |
|
|
receive_addr + 4 + i, (unsigned |
488 |
|
|
char *) di + i, 1, MEM_WRITE, |
489 |
|
|
NO_EXCEPTIONS | PHYSICAL); |
490 |
|
|
} |
491 |
|
|
break; |
492 |
|
|
|
493 |
|
|
case MAPLE_COMMAND_GETCOND: |
494 |
|
|
cpu->memory_rw(cpu, cpu->mem, addr, (void *) &buf, 4, |
495 |
|
|
MEM_READ, NO_EXCEPTIONS | PHYSICAL); |
496 |
|
|
cond = buf[3] + (buf[2] << 8) + (buf[1] << 16) |
497 |
|
|
+ (buf[0] << 24); |
498 |
|
|
if (cond & MAPLE_FUNC(MAPLE_FN_CONTROLLER)) { |
499 |
|
|
maple_getcond_controller_response( |
500 |
|
|
d, cpu, port, receive_addr); |
501 |
|
|
} else if (cond & MAPLE_FUNC(MAPLE_FN_KEYBOARD)) { |
502 |
|
|
maple_getcond_keyboard_response( |
503 |
|
|
d, cpu, port, receive_addr); |
504 |
|
|
} else { |
505 |
|
|
fatal("[ dreamcast_maple: WARNING: GETCOND: " |
506 |
|
|
"UNIMPLEMENTED 0x%08"PRIx32" ]\n", cond); |
507 |
|
|
} |
508 |
|
|
break; |
509 |
|
|
|
510 |
|
|
case MAPLE_COMMAND_BWRITE: |
511 |
|
|
fatal("[ dreamcast_maple: BWRITE: TODO ]\n"); |
512 |
|
|
break; |
513 |
|
|
|
514 |
|
|
default:fatal("[ dreamcast_maple: command %i: TODO ]\n", cmd); |
515 |
|
|
exit(1); |
516 |
|
|
} |
517 |
|
|
|
518 |
|
|
addr += datalen_cmd * 4; |
519 |
|
|
|
520 |
|
|
/* Last request? Then stop. */ |
521 |
|
|
if (last_message) |
522 |
|
|
break; |
523 |
|
|
} |
524 |
|
|
|
525 |
|
|
/* Assert the SYSASIC_EVENT_MAPLE_DMADONE event: */ |
526 |
|
|
SYSASIC_TRIGGER_EVENT(SYSASIC_EVENT_MAPLE_DMADONE); |
527 |
|
|
} |
528 |
|
|
|
529 |
|
|
|
530 |
|
|
DEVICE_ACCESS(dreamcast_maple) |
531 |
|
|
{ |
532 |
|
|
struct dreamcast_maple_data *d = (struct dreamcast_maple_data *) extra; |
533 |
|
|
uint64_t idata = 0, odata = 0; |
534 |
|
|
|
535 |
|
|
if (writeflag == MEM_WRITE) |
536 |
|
|
idata = memory_readmax64(cpu, data, len); |
537 |
|
|
|
538 |
|
|
switch (relative_addr) { |
539 |
|
|
|
540 |
|
|
case 0x04: /* MAPLE_DMAADDR */ |
541 |
|
|
if (writeflag == MEM_WRITE) { |
542 |
|
|
d->dmaaddr = idata; |
543 |
|
|
/* debug("[ dreamcast_maple: dmaaddr set to 0x%08x" |
544 |
|
|
" ]\n", d->dmaaddr); */ |
545 |
|
|
} else { |
546 |
|
|
fatal("[ dreamcast_maple: TODO: read from dmaaddr ]\n"); |
547 |
|
|
odata = d->dmaaddr; |
548 |
|
|
} |
549 |
|
|
break; |
550 |
|
|
|
551 |
|
|
case 0x10: /* MAPLE_RESET2 */ |
552 |
|
|
if (writeflag == MEM_WRITE && idata != 0) |
553 |
|
|
fatal("[ dreamcast_maple: UNIMPLEMENTED reset2 value" |
554 |
|
|
" 0x%08x ]\n", (int)idata); |
555 |
|
|
break; |
556 |
|
|
|
557 |
|
|
case 0x14: /* MAPLE_ENABLE */ |
558 |
|
|
if (writeflag == MEM_WRITE) |
559 |
|
|
d->enable = idata; |
560 |
|
|
else |
561 |
|
|
odata = d->enable; |
562 |
|
|
break; |
563 |
|
|
|
564 |
|
|
case 0x18: /* MAPLE_STATE */ |
565 |
|
|
if (writeflag == MEM_WRITE) { |
566 |
|
|
switch (idata) { |
567 |
|
|
case 0: break; |
568 |
|
|
case 1: maple_do_dma_xfer(cpu, d); |
569 |
|
|
break; |
570 |
|
|
default:fatal("[ dreamcast_maple: UNIMPLEMENTED " |
571 |
|
|
"state value %i ]\n", (int)idata); |
572 |
|
|
} |
573 |
|
|
} else { |
574 |
|
|
/* Always return 0 to indicate DMA xfer complete. */ |
575 |
|
|
odata = 0; |
576 |
|
|
} |
577 |
|
|
break; |
578 |
|
|
|
579 |
|
|
case 0x80: /* MAPLE_SPEED */ |
580 |
|
|
if (writeflag == MEM_WRITE) { |
581 |
|
|
d->timeout = (idata >> 16) & 0xffff; |
582 |
|
|
/* TODO: Bits 8..9 are "speed", but only the value |
583 |
|
|
0 (indicating 2 Mbit/s) should be used. */ |
584 |
|
|
debug("[ dreamcast_maple: timeout set to %i ]\n", |
585 |
|
|
d->timeout); |
586 |
|
|
} else { |
587 |
|
|
odata = d->timeout << 16; |
588 |
|
|
} |
589 |
|
|
break; |
590 |
|
|
|
591 |
|
|
case 0x8c: /* MAPLE_RESET */ |
592 |
|
|
if (writeflag == MEM_WRITE) { |
593 |
|
|
if (idata != 0x6155404f) |
594 |
|
|
fatal("[ dreamcast_maple: UNIMPLEMENTED reset " |
595 |
|
|
"value 0x%08x ]\n", (int)idata); |
596 |
|
|
d->enable = 0; |
597 |
|
|
} |
598 |
|
|
break; |
599 |
|
|
|
600 |
|
|
default:if (writeflag == MEM_READ) { |
601 |
|
|
fatal("[ dreamcast_maple: UNIMPLEMENTED read from " |
602 |
|
|
"addr 0x%x ]\n", (int)relative_addr); |
603 |
|
|
} else { |
604 |
|
|
fatal("[ dreamcast_maple: UNIMPLEMENTED write to addr " |
605 |
|
|
"0x%x: 0x%x ]\n", (int)relative_addr, (int)idata); |
606 |
|
|
} |
607 |
|
|
} |
608 |
|
|
|
609 |
|
|
if (writeflag == MEM_READ) |
610 |
|
|
memory_writemax64(cpu, data, len, odata); |
611 |
|
|
|
612 |
|
|
return 1; |
613 |
|
|
} |
614 |
|
|
|
615 |
|
|
|
616 |
|
|
DEVINIT(dreamcast_maple) |
617 |
|
|
{ |
618 |
|
|
struct machine *machine = devinit->machine; |
619 |
|
|
struct dreamcast_maple_data *d = |
620 |
|
|
malloc(sizeof(struct dreamcast_maple_data)); |
621 |
|
|
if (d == NULL) { |
622 |
|
|
fprintf(stderr, "out of memory\n"); |
623 |
|
|
exit(1); |
624 |
|
|
} |
625 |
|
|
memset(d, 0, sizeof(struct dreamcast_maple_data)); |
626 |
|
|
|
627 |
|
|
memory_device_register(machine->memory, devinit->name, |
628 |
|
|
0x5f6c00, 0x100, dev_dreamcast_maple_access, d, DM_DEFAULT, NULL); |
629 |
|
|
|
630 |
|
|
/* Devices connected to port A..D: */ |
631 |
|
|
d->device[0] = &maple_device_controller; |
632 |
|
|
d->device[1] = NULL; |
633 |
|
|
d->device[2] = &maple_device_keyboard; |
634 |
|
|
d->device[3] = NULL; /* TODO: &maple_device_mouse; */ |
635 |
|
|
|
636 |
|
|
d->console_handle = console_start_slave_inputonly(machine, "maple", 1); |
637 |
|
|
machine->main_console_handle = d->console_handle; |
638 |
|
|
|
639 |
|
|
machine_add_tickfunction(devinit->machine, dev_maple_tick, d, |
640 |
|
|
MAPLE_TICK_SHIFT, 0.0); |
641 |
|
|
|
642 |
|
|
return 1; |
643 |
|
|
} |
644 |
|
|
|