1405d9b10b
Turned the char arrays in gameport.h into const char pointers; The makefile no longer links in the (unfinished) PIIX4 emulation code (which is currently not used by anything even in the Dev branch).
392 lines
10 KiB
C
392 lines
10 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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* ATI 28800 emulation (VGA Charger)
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*
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* Version: @(#)vid_ati28800.c 1.0.7 2018/02/18
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*
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* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2008-2018 Sarah Walker.
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* Copyright 2016-2018 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 <stdlib.h>
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#include <wchar.h>
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#include "../86box.h"
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#include "../cpu/cpu.h"
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#include "../io.h"
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#include "../pit.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 "../timer.h"
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#include "video.h"
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#include "vid_ati28800.h"
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#include "vid_ati_eeprom.h"
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#include "vid_svga.h"
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#include "vid_svga_render.h"
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#define BIOS_VGAXL_EVEN_PATH L"roms/video/ati28800/xleven.bin"
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#define BIOS_VGAXL_ODD_PATH L"roms/video/ati28800/xlodd.bin"
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#if defined(DEV_BRANCH) && defined(USE_XL24)
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#define BIOS_XL24_EVEN_PATH L"roms/video/ati28800/112-14318-102.bin"
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#define BIOS_XL24_ODD_PATH L"roms/video/ati28800/112-14319-102.bin"
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#endif
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#define BIOS_ROM_PATH L"roms/video/ati28800/bios.bin"
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typedef struct ati28800_t
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{
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svga_t svga;
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ati_eeprom_t eeprom;
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rom_t bios_rom;
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uint8_t regs[256];
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int index;
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} ati28800_t;
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static void ati28800_out(uint16_t addr, uint8_t val, void *p)
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{
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ati28800_t *ati28800 = (ati28800_t *)p;
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svga_t *svga = &ati28800->svga;
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uint8_t old;
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/* pclog("ati28800_out : %04X %02X %04X:%04X\n", addr, val, CS,pc); */
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if (((addr&0xFFF0) == 0x3D0 || (addr&0xFFF0) == 0x3B0) && !(svga->miscout&1))
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addr ^= 0x60;
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switch (addr)
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{
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case 0x1ce:
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ati28800->index = val;
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break;
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case 0x1cf:
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ati28800->regs[ati28800->index] = val;
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switch (ati28800->index)
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{
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case 0xb2:
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case 0xbe:
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if (ati28800->regs[0xbe] & 8) /*Read/write bank mode*/
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{
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svga->read_bank = ((ati28800->regs[0xb2] >> 5) & 7) * 0x10000;
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svga->write_bank = ((ati28800->regs[0xb2] >> 1) & 7) * 0x10000;
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}
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else /*Single bank mode*/
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svga->read_bank = svga->write_bank = ((ati28800->regs[0xb2] >> 1) & 7) * 0x10000;
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break;
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case 0xb3:
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ati_eeprom_write(&ati28800->eeprom, val & 8, val & 2, val & 1);
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break;
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}
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break;
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case 0x3D4:
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svga->crtcreg = val & 0x3f;
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return;
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case 0x3D5:
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if ((svga->crtcreg < 7) && (svga->crtc[0x11] & 0x80))
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return;
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if ((svga->crtcreg == 7) && (svga->crtc[0x11] & 0x80))
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val = (svga->crtc[7] & ~0x10) | (val & 0x10);
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old = svga->crtc[svga->crtcreg];
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svga->crtc[svga->crtcreg] = val;
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if (old != val)
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{
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if (svga->crtcreg < 0xe || svga->crtcreg > 0x10)
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{
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svga->fullchange = changeframecount;
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svga_recalctimings(svga);
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}
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}
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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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static uint8_t ati28800_in(uint16_t addr, void *p)
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{
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ati28800_t *ati28800 = (ati28800_t *)p;
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svga_t *svga = &ati28800->svga;
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uint8_t temp;
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/* if (addr != 0x3da) pclog("ati28800_in : %04X ", addr); */
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if (((addr&0xFFF0) == 0x3D0 || (addr&0xFFF0) == 0x3B0) && !(svga->miscout&1)) addr ^= 0x60;
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switch (addr)
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{
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case 0x1ce:
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temp = ati28800->index;
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break;
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case 0x1cf:
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switch (ati28800->index)
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{
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case 0xb7:
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temp = ati28800->regs[ati28800->index] & ~8;
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if (ati_eeprom_read(&ati28800->eeprom))
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temp |= 8;
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break;
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default:
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temp = ati28800->regs[ati28800->index];
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break;
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}
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break;
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case 0x3c2:
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if ((svga->vgapal[0].r + svga->vgapal[0].g + svga->vgapal[0].b) >= 0x50)
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temp = 0;
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else
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temp = 0x10;
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break;
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case 0x3D4:
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temp = svga->crtcreg;
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break;
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case 0x3D5:
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temp = svga->crtc[svga->crtcreg];
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break;
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default:
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temp = svga_in(addr, svga);
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break;
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}
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/* if (addr != 0x3da) pclog("%02X %04X:%04X\n", temp, CS,cpu_state.pc); */
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return temp;
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}
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static void ati28800_recalctimings(svga_t *svga)
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{
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ati28800_t *ati28800 = (ati28800_t *)svga->p;
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pclog("ati28800_recalctimings\n");
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if (!svga->scrblank && (ati28800->regs[0xb0] & 0x20)) /*Extended 256 colour modes*/
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{
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pclog("8bpp_highres\n");
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svga->render = svga_render_8bpp_highres;
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svga->rowoffset <<= 1;
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svga->ma <<= 1;
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}
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}
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static void *
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ati28800_init(device_t *info)
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{
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uint32_t memory = 512;
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ati28800_t *ati;
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#if 0
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if (info->type == GFX_VGAWONDERXL)
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#endif
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memory = device_get_config_int("memory");
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memory <<= 10;
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ati = malloc(sizeof(ati28800_t));
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memset(ati, 0x00, sizeof(ati28800_t));
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switch(info->local) {
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case GFX_VGAWONDERXL:
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rom_init_interleaved(&ati->bios_rom,
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BIOS_VGAXL_EVEN_PATH,
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BIOS_VGAXL_ODD_PATH,
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0xc0000, 0x10000, 0xffff,
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0, MEM_MAPPING_EXTERNAL);
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break;
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#if defined(DEV_BRANCH) && defined(USE_XL24)
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case GFX_VGAWONDERXL24:
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rom_init_interleaved(&ati->bios_rom,
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BIOS_XL24_EVEN_PATH,
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BIOS_XL24_ODD_PATH,
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0xc0000, 0x10000, 0xffff,
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0, MEM_MAPPING_EXTERNAL);
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break;
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#endif
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default:
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rom_init(&ati->bios_rom,
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BIOS_ROM_PATH,
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0xc0000, 0x8000, 0x7fff,
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0, MEM_MAPPING_EXTERNAL);
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break;
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}
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svga_init(&ati->svga, ati, memory, /*512kb*/
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ati28800_recalctimings,
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ati28800_in, ati28800_out,
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NULL,
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NULL);
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io_sethandler(0x01ce, 2,
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ati28800_in, NULL, NULL,
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ati28800_out, NULL, NULL, ati);
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io_sethandler(0x03c0, 32,
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ati28800_in, NULL, NULL,
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ati28800_out, NULL, NULL, ati);
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ati->svga.miscout = 1;
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ati_eeprom_load(&ati->eeprom, L"ati28800.nvr", 0);
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return(ati);
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}
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static int
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ati28800_available(void)
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{
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return(rom_present(BIOS_ROM_PATH));
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}
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static int
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compaq_ati28800_available(void)
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{
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return((rom_present(BIOS_VGAXL_EVEN_PATH) && rom_present(BIOS_VGAXL_ODD_PATH)));
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}
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#if defined(DEV_BRANCH) && defined(USE_XL24)
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static int
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ati28800_wonderxl24_available(void)
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{
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return((rom_present(BIOS_XL24_EVEN_PATH) && rom_present(BIOS_XL24_ODD_PATH)));
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}
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#endif
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static void
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ati28800_close(void *priv)
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{
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ati28800_t *ati = (ati28800_t *)priv;
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svga_close(&ati->svga);
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free(ati);
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}
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static void
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ati28800_speed_changed(void *p)
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{
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ati28800_t *ati28800 = (ati28800_t *)p;
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svga_recalctimings(&ati28800->svga);
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}
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static void
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ati28800_force_redraw(void *priv)
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{
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ati28800_t *ati = (ati28800_t *)priv;
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ati->svga.fullchange = changeframecount;
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}
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static void ati28800_add_status_info(char *s, int max_len, void *priv)
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{
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ati28800_t *ati = (ati28800_t *)priv;
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svga_add_status_info(s, max_len, &ati->svga);
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}
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static device_config_t ati28800_config[] =
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{
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{
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"memory", "Memory size", CONFIG_SELECTION, "", 512,
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{
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{
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"256 kB", 256
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},
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{
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"512 kB", 512
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},
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{
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""
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}
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}
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},
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{
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"", "", -1
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}
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};
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#if defined(DEV_BRANCH) && defined(USE_XL24)
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static device_config_t ati28800_wonderxl_config[] =
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{
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{
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"memory", "Memory size", CONFIG_SELECTION, "", 512,
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{
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{
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"256 kB", 256
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},
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{
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"512 kB", 512
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},
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{
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"1 MB", 1024
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},
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{
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""
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}
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}
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},
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{
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"", "", -1
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}
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};
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#endif
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device_t ati28800_device =
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{
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"ATI-28800",
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DEVICE_ISA,
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0,
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ati28800_init, ati28800_close, NULL,
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ati28800_available,
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ati28800_speed_changed,
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ati28800_force_redraw,
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ati28800_add_status_info,
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ati28800_config
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};
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device_t compaq_ati28800_device =
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{
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"Compaq ATI-28800",
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DEVICE_ISA,
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GFX_VGAWONDERXL,
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ati28800_init, ati28800_close, NULL,
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compaq_ati28800_available,
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ati28800_speed_changed,
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ati28800_force_redraw,
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ati28800_add_status_info,
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ati28800_config
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};
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#if defined(DEV_BRANCH) && defined(USE_XL24)
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device_t ati28800_wonderxl24_device =
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{
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"ATI-28800 (VGA Wonder XL24)",
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DEVICE_ISA,
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GFX_VGAWONDERXL24,
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ati28800_init, ati28800_close, NULL,
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ati28800_wonderxl24_available,
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ati28800_speed_changed,
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ati28800_force_redraw,
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ati28800_add_status_info,
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ati28800_wonderxl_config
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};
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#endif
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