a412ceb4d9
Extensively cleaned up and changed the CD-ROM code; Removed CD-ROM IOCTTL (it was causing performance and stability issues); Turned a lot of things into device_t's; Added the PS/1 Model 2011 XTA and standalone XTA hard disk controllers, ported from Varcem; Numerous FDC fixes for the PS/1 Model 2121; NVR changes ported from Varcem; The PCap code no longer requires libpcap to be compiled; Numerous fixes to various SCSI controllers; Updated NukedOPL to 1.8; Fixes to OpenAL initialization and closing, should give less Audio issues now; Revorked parts of the common (S)VGA code (also based on code from QEMU); Removed the Removable SCSI hard disks (they were a never finished experiment so there was no need to keep them there); Cleaned up the SCSI hard disk and Iomega ZIP code (but more cleanups of that are coming in the future); In some occasions (IDE hard disks in multiple sector mode and SCSI hard disks) the status bar icon is no longer updated, should improve performance a bit; Redid the way the tertiary and quaternary IDE controllers are configured (and they are now device_t's); Extensively reworked the IDE code and fixed quite a few bugs; Fixes to XT MFM, AT MFM, and AT ESDI code; Some changes to XTIDE and MCA ESDI code; Some fixes to the CD-ROM image handler.
250 lines
5.9 KiB
C
250 lines
5.9 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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* IBM VGA emulation.
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*
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* Version: @(#)vid_vga.c 1.0.4 2018/03/18
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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 "../io.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_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 & 0x3f;
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return;
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case 0x3D5:
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if (svga->crtcreg & 0x20)
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return;
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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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if (svga->crtcreg & 0x20)
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temp = 0xff;
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else
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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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static void *vga_init(const device_t *info)
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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, L"roms/video/vga/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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#ifdef DEV_BRANCH
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static void *trigem_unk_init(const device_t *info)
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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, L"roms/video/vga/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(const device_t *info)
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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(void)
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{
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return rom_present(L"roms/video/vga/ibm_vga.bin");
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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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const device_t vga_device =
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{
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"VGA",
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DEVICE_ISA,
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0,
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vga_init,
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vga_close,
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NULL,
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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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#ifdef DEV_BRANCH
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const device_t trigem_unk_device =
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{
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"VGA",
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DEVICE_ISA,
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0,
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trigem_unk_init,
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vga_close,
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NULL,
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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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const device_t ps1vga_device =
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{
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"PS/1 VGA",
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0,
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0,
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ps1vga_init,
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vga_close,
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NULL,
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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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