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/* |
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* Copyright (C) 2003-2006 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_fdc.c,v 1.18 2006/02/09 20:02:59 debug Exp $ |
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* |
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* PC-style floppy controller. |
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* |
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* TODO! (This is just a dummy skeleton right now.) |
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* |
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* TODO 2: Make it work nicely with both ARC and PC emulation. |
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* |
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* See http://members.tripod.com/~oldboard/assembly/765.html for a |
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* quick overview. |
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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 "device.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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|
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#define DEV_FDC_LENGTH 6 /* TODO 8, but collision with wdc */ |
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|
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|
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struct fdc_data { |
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unsigned char reg[DEV_FDC_LENGTH]; |
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int irqnr; |
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}; |
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|
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|
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/* |
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* dev_fdc_access(): |
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*/ |
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DEVICE_ACCESS(fdc) |
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{ |
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uint64_t idata = 0, odata = 0; |
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size_t i; |
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struct fdc_data *d = extra; |
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|
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if (writeflag == MEM_WRITE) |
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idata = memory_readmax64(cpu, data, len); |
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|
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switch (relative_addr) { |
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case 0x04: |
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break; |
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default:if (writeflag==MEM_READ) { |
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fatal("[ fdc: read from reg %i ]\n", |
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(int)relative_addr); |
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odata = d->reg[relative_addr]; |
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} else { |
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fatal("[ fdc: write to reg %i:", (int)relative_addr); |
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for (i=0; i<len; i++) |
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fatal(" %02x", data[i]); |
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fatal(" ]\n"); |
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d->reg[relative_addr] = idata; |
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} |
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} |
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|
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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|
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return 1; |
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} |
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|
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|
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DEVINIT(fdc) |
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{ |
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struct fdc_data *d; |
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|
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d = malloc(sizeof(struct fdc_data)); |
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if (d == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(d, 0, sizeof(struct fdc_data)); |
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d->irqnr = devinit->irq_nr; |
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|
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memory_device_register(devinit->machine->memory, devinit->name, |
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devinit->addr, DEV_FDC_LENGTH, dev_fdc_access, d, |
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DM_DEFAULT, NULL); |
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|
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return 1; |
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} |
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