f6ef1f833c
Thoroughly clean up the code to vastly reduce the number of compiler warnings and found and fixed several bugs in the process; Applied all mainline PCem commits; Added SCSI hard disk emulation; Commented out all unfinished machines and graphics cards; Added the AOpen AP53 and ASUS P/I-P55T2 machines as well as another Tyan 440FX machine, all three with AMI WinBIOS (patch from TheCollector1995); Added the Diamond Stealth 3D 3000 (S3 ViRGE/VX) graphics card (patch from TheCollector1995); Added the PS/2 XT IDE (AccuLogic) HDD Controller (patch from TheCollector1995); Added Microsoft/Logitech Bus Mouse emulation (patch from waltje); Overhauled the makefiles (patch from waltje); Added the Adaptec AHA-1542CF SCSI controller (patch from waltje); Added preliminary (but still unfinished) Adaptec AHA-154x SCSI controller BIOS support (patch from waltje); Added an ISABugger debugging device (patch from waltje); Added sanity checks to the Direct3D code.
259 lines
6.1 KiB
C
259 lines
6.1 KiB
C
/* Copyright holders: Sarah Walker
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see COPYING for more details
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*/
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/*IBM VGA emulation*/
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#include <stdlib.h>
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#include "ibm.h"
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#include "device.h"
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#include "io.h"
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#include "mem.h"
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#include "rom.h"
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#include "video.h"
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#include "vid_svga.h"
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#include "vid_vga.h"
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typedef struct vga_t
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{
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svga_t svga;
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rom_t bios_rom;
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} vga_t;
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void vga_out(uint16_t addr, uint8_t val, void *p)
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{
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vga_t *vga = (vga_t *)p;
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svga_t *svga = &vga->svga;
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uint8_t old;
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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 0x3D4:
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svga->crtcreg = val & 0x1f;
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return;
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case 0x3D5:
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if (svga->crtcreg <= 0x18)
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val &= mask_crtc[svga->crtcreg];
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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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uint8_t vga_in(uint16_t addr, void *p)
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{
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vga_t *vga = (vga_t *)p;
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svga_t *svga = &vga->svga;
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uint8_t temp;
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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 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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return temp;
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}
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void *vga_init()
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{
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vga_t *vga = malloc(sizeof(vga_t));
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memset(vga, 0, sizeof(vga_t));
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rom_init(&vga->bios_rom, "roms/ibm_vga.bin", 0xc0000, 0x8000, 0x7fff, 0x2000, MEM_MAPPING_EXTERNAL);
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svga_init(&vga->svga, vga, 1 << 18, /*256kb*/
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NULL,
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vga_in, vga_out,
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NULL,
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NULL);
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io_sethandler(0x03c0, 0x0020, vga_in, NULL, NULL, vga_out, NULL, NULL, vga);
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vga->svga.bpp = 8;
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vga->svga.miscout = 1;
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return vga;
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}
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#if 0
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void *vga_chips_init()
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{
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vga_t *vga = malloc(sizeof(vga_t));
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memset(vga, 0, sizeof(vga_t));
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rom_init(&vga->bios_rom, "roms/SD620.04M", 0xc0000, 0x8000, 0x7fff, 0x2000, MEM_MAPPING_EXTERNAL);
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svga_init(&vga->svga, vga, 1 << 18, /*256kb*/
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NULL,
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vga_in, vga_out,
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NULL,
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NULL);
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io_sethandler(0x03c0, 0x0020, vga_in, NULL, NULL, vga_out, NULL, NULL, vga);
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vga->svga.bpp = 8;
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vga->svga.miscout = 1;
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return vga;
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}
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#endif
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#ifdef DEV_BRANCH
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void *trigem_unk_init()
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{
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vga_t *vga = malloc(sizeof(vga_t));
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memset(vga, 0, sizeof(vga_t));
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rom_init(&vga->bios_rom, "roms/ibm_vga.bin", 0xc0000, 0x8000, 0x7fff, 0x2000, MEM_MAPPING_EXTERNAL);
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svga_init(&vga->svga, vga, 1 << 18, /*256kb*/
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NULL,
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vga_in, vga_out,
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NULL,
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NULL);
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io_sethandler(0x03c0, 0x0020, vga_in, NULL, NULL, vga_out, NULL, NULL, vga);
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io_sethandler(0x22ca, 0x0002, svga_in, NULL, NULL, vga_out, NULL, NULL, vga);
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io_sethandler(0x22ce, 0x0002, svga_in, NULL, NULL, vga_out, NULL, NULL, vga);
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io_sethandler(0x32ca, 0x0002, svga_in, NULL, NULL, vga_out, NULL, NULL, vga);
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vga->svga.bpp = 8;
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vga->svga.miscout = 1;
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return vga;
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}
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#endif
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/*PS/1 uses a standard VGA controller, but with no option ROM*/
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void *ps1vga_init()
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{
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vga_t *vga = malloc(sizeof(vga_t));
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memset(vga, 0, sizeof(vga_t));
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svga_init(&vga->svga, vga, 1 << 18, /*256kb*/
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NULL,
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vga_in, vga_out,
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NULL,
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NULL);
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io_sethandler(0x03c0, 0x0020, vga_in, NULL, NULL, vga_out, NULL, NULL, vga);
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vga->svga.bpp = 8;
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vga->svga.miscout = 1;
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return vga;
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}
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static int vga_available()
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{
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return rom_present("roms/ibm_vga.bin");
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}
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/* static int vga_chips_available()
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{
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return rom_present("roms/SD620.04M");
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} */
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void vga_close(void *p)
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{
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vga_t *vga = (vga_t *)p;
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svga_close(&vga->svga);
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free(vga);
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}
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void vga_speed_changed(void *p)
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{
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vga_t *vga = (vga_t *)p;
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svga_recalctimings(&vga->svga);
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}
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void vga_force_redraw(void *p)
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{
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vga_t *vga = (vga_t *)p;
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vga->svga.fullchange = changeframecount;
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}
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void vga_add_status_info(char *s, int max_len, void *p)
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{
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vga_t *vga = (vga_t *)p;
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svga_add_status_info(s, max_len, &vga->svga);
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}
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device_t vga_device =
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{
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"VGA",
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0,
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vga_init,
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vga_close,
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vga_available,
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vga_speed_changed,
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vga_force_redraw,
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vga_add_status_info
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};
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/* device_t vga_chips_device =
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{
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"Chips VGA",
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0,
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vga_chips_init,
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vga_close,
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vga_chips_available,
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vga_speed_changed,
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vga_force_redraw,
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vga_add_status_info
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}; */
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#ifdef DEV_BRANCH
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device_t trigem_unk_device =
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{
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"VGA",
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0,
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trigem_unk_init,
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vga_close,
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vga_available,
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vga_speed_changed,
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vga_force_redraw,
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vga_add_status_info
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};
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#endif
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device_t ps1vga_device =
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{
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"PS/1 VGA",
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0,
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ps1vga_init,
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vga_close,
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vga_available,
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vga_speed_changed,
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vga_force_redraw,
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vga_add_status_info
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};
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