7c67e867c8
IBM.H is gone, video stuff re-organized. Keyboard stuff reorganized. Machines that have their own video, mouse and/or keyboard now have all this in their machine file. Fixed and other cleanups here and there.
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Emulation of the Cirrus Logic RAMDAC.
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*
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* Version: @(#)vid_cl_ramdac.c 1.0.2 2017/11/04
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*
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* Author: Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2016,2017 Miran Grca.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <wchar.h>
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#include "../86box.h"
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#include "../mem.h"
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#include "../rom.h"
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#include "../device.h"
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#include "video.h"
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#include "vid_svga.h"
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#include "vid_cl_ramdac.h"
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#include "vid_cl_gd.h"
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#include "vid_cl_gd_blit.h"
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void cl_ramdac_out(uint16_t addr, uint8_t val, cl_ramdac_t *ramdac, void *clgd, svga_t *svga)
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{
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clgd_t *real_clgd = (clgd_t *) clgd;
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//pclog("OUT RAMDAC %04X %02X\n",addr,val);
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switch (addr)
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{
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case 0x3C6:
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if (ramdac->state == 4)
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{
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ramdac->state = 0;
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ramdac->ctrl = val;
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svga_recalctimings(svga);
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return;
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}
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ramdac->state = 0;
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break;
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case 0x3C7: case 0x3C8:
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ramdac->state = 0;
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break;
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case 0x3C9:
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if (svga->seqregs[0x12] & CIRRUS_CURSOR_HIDDENPEL)
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{
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ramdac->state = 0;
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svga->fullchange = changeframecount;
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switch (svga->dac_pos)
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{
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case 0:
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real_clgd->hiddenpal[svga->dac_write & 0xf].r = val & 63;
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svga->dac_pos++;
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break;
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case 1:
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real_clgd->hiddenpal[svga->dac_write & 0xf].g = val & 63;
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svga->dac_pos++;
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break;
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case 2:
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real_clgd->hiddenpal[svga->dac_write & 0xf].b = val & 63;
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svga->dac_pos = 0;
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svga->dac_write = (svga->dac_write + 1) & 255;
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break;
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}
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return;
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}
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ramdac->state = 0;
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break;
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}
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svga_out(addr, val, svga);
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}
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uint8_t cl_ramdac_in(uint16_t addr, cl_ramdac_t *ramdac, void *clgd, svga_t *svga)
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{
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clgd_t *real_clgd = (clgd_t *) clgd;
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//pclog("IN RAMDAC %04X\n",addr);
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switch (addr)
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{
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case 0x3C6:
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if (ramdac->state == 4)
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{
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ramdac->state = 0;
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return ramdac->ctrl;
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}
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ramdac->state++;
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break;
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case 0x3C7: case 0x3C8:
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ramdac->state = 0;
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break;
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case 0x3C9:
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if (svga->seqregs[0x12] & CIRRUS_CURSOR_HIDDENPEL)
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{
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ramdac->state = 0;
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switch (svga->dac_pos)
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{
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case 0:
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svga->dac_pos++;
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return real_clgd->hiddenpal[svga->dac_read & 0xf].r;
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case 1:
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svga->dac_pos++;
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return real_clgd->hiddenpal[svga->dac_read & 0xf].g;
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case 2:
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svga->dac_pos=0;
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svga->dac_read = (svga->dac_read + 1) & 255;
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return real_clgd->hiddenpal[(svga->dac_read - 1) & 15].b;
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}
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}
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ramdac->state = 0;
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break;
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}
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return svga_in(addr, svga);
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}
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