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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_pal.c,v 1.4 2006/03/05 16:20:24 debug Exp $ |
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* |
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* PAL (TV) emulation. Experimental. |
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* |
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* TODO: Almost everything. |
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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 "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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|
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|
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struct pal_data { |
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uint64_t addr; |
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struct vfb_data *fb; |
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|
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double hz; |
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int cur_scanline; |
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int cur_x; |
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|
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int visible_x, visible_y; |
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}; |
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|
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|
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/* |
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* dev_pal_tick(): |
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* |
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* Called each cycle. |
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*/ |
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void dev_pal_tick(struct cpu *cpu, void *extra) |
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{ |
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struct pal_data *d = extra; |
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int signal = 0x80; |
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|
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switch (cpu->machine->machine_type) { |
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|
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case MACHINE_AVR_PAL: |
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signal = cpu->cd.avr.portd_write * 4; |
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break; |
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|
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case MACHINE_AVR_MAHPONG: |
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signal = (cpu->cd.avr.portc_write & 0x80) | |
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((cpu->cd.avr.portc_write & 0x08) << 3) | |
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((cpu->cd.avr.portd_write & 0x10) << 1); |
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break; |
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} |
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|
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d->fb->framebuffer[3 * (d->cur_x + d->cur_scanline * d->visible_x) |
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+ 0] = signal; |
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d->fb->framebuffer[3 * (d->cur_x + d->cur_scanline * d->visible_x) |
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+ 1] = signal; |
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d->fb->framebuffer[3 * (d->cur_x + d->cur_scanline * d->visible_x) |
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+ 2] = signal; |
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|
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d->cur_x ++; |
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if (d->cur_x >= d->visible_x) { |
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d->cur_x = 0; |
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d->cur_scanline ++; |
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if (d->cur_scanline >= d->visible_y) { |
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d->cur_scanline = 0; |
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d->fb->update_x1 = 0; |
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d->fb->update_x2 = d->visible_x - 1; |
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d->fb->update_y1 = 0; |
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d->fb->update_y2 = d->visible_y - 1; |
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} |
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} |
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} |
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|
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|
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DEVINIT(pal) |
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{ |
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struct pal_data *d; |
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d = malloc(sizeof(struct pal_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 pal_data)); |
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|
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d->hz = 12000000; |
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d->addr = 0x9000000; |
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d->visible_x = 579; |
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d->visible_y = 625; |
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|
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switch (devinit->machine->machine_type) { |
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case MACHINE_AVR_PAL: |
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case MACHINE_AVR_MAHPONG: |
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break; |
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default:fatal("Not yet implemented for this machine type.\n"); |
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exit(1); |
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} |
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|
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d->fb = dev_fb_init(devinit->machine, devinit->machine->memory, |
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d->addr, VFB_GENERIC, d->visible_x, d->visible_y, |
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d->visible_x, d->visible_y, 24, "PAL TV"); |
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|
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machine_add_tickfunction(devinit->machine, dev_pal_tick, d, |
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0, d->hz); |
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|
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return 1; |
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} |
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