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.
362 lines
6.1 KiB
C
362 lines
6.1 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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* Oak OTI067/077 emulation.
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*
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* Version: @(#)vid_oti067.c 1.0.3 2017/11/04
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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 2008-2017 Sarah Walker.
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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 <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_oti067.h"
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#include "vid_svga.h"
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#define BIOS_67_PATH L"roms/video/oti/bios.bin"
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#define BIOS_77_PATH L"roms/video/oti/oti077.vbi"
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typedef struct {
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svga_t svga;
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rom_t bios_rom;
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int index;
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uint8_t regs[32];
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uint8_t pos;
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uint32_t vram_size;
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uint32_t vram_mask;
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uint8_t chip_id;
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} oti_t;
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static void
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oti_out(uint16_t addr, uint8_t val, void *p)
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{
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oti_t *oti = (oti_t *)p;
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svga_t *svga = &oti->svga;
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uint8_t old;
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if ((((addr&0xFFF0) == 0x3D0 || (addr&0xFFF0) == 0x3B0) && addr < 0x3de) &&
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!(svga->miscout & 1)) addr ^= 0x60;
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switch (addr) {
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case 0x3D4:
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svga->crtcreg = val & 31;
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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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if (svga->crtcreg < 0xE || svga->crtcreg > 0x10) {
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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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case 0x3DE:
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oti->index = val & 0x1f;
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return;
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case 0x3DF:
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oti->regs[oti->index] = val;
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switch (oti->index) {
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case 0xD:
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svga->vram_display_mask = (val & 0xc) ? oti->vram_mask : 0x3ffff;
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if ((val & 0x80) && oti->vram_size == 256)
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mem_mapping_disable(&svga->mapping);
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else
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mem_mapping_enable(&svga->mapping);
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if (!(val & 0x80))
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svga->vram_display_mask = 0x3ffff;
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break;
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case 0x11:
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svga->read_bank = (val & 0xf) * 65536;
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svga->write_bank = (val >> 4) * 65536;
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break;
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}
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return;
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}
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svga_out(addr, val, svga);
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}
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static uint8_t
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oti_in(uint16_t addr, void *p)
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{
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oti_t *oti = (oti_t *)p;
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svga_t *svga = &oti->svga;
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uint8_t temp;
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if ((((addr&0xFFF0) == 0x3D0 || (addr&0xFFF0) == 0x3B0) && addr < 0x3de) &&
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!(svga->miscout & 1)) addr ^= 0x60;
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switch (addr) {
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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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case 0x3DE:
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temp = oti->index | (oti->chip_id << 5);
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break;
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case 0x3DF:
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if (oti->index==0x10)
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temp = 0x18;
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else
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temp = oti->regs[oti->index];
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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
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oti_pos_out(uint16_t addr, uint8_t val, void *p)
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{
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oti_t *oti = (oti_t *)p;
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if ((val & 8) != (oti->pos & 8)) {
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if (val & 8)
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io_sethandler(0x03c0, 32, oti_in, NULL, NULL,
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oti_out, NULL, NULL, oti);
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else
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io_removehandler(0x03c0, 32, oti_in, NULL, NULL,
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oti_out, NULL, NULL, oti);
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}
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oti->pos = val;
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}
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static uint8_t
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oti_pos_in(uint16_t addr, void *p)
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{
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oti_t *oti = (oti_t *)p;
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return(oti->pos);
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}
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static void
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oti_recalctimings(svga_t *svga)
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{
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oti_t *oti = (oti_t *)svga->p;
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if (oti->regs[0x14] & 0x08) svga->ma_latch |= 0x10000;
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if (oti->regs[0x0d] & 0x0c) svga->rowoffset <<= 1;
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if (oti->regs[0x14] & 0x80) {
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svga->vtotal *= 2;
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svga->dispend *= 2;
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svga->vblankstart *= 2;
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svga->vsyncstart *=2;
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svga->split *= 2;
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}
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}
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static void *
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oti_init(device_t *info)
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{
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oti_t *oti = malloc(sizeof(oti_t));
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wchar_t *romfn = NULL;
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memset(oti, 0x00, sizeof(oti_t));
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oti->chip_id = info->local;
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switch(oti->chip_id) {
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case 2:
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romfn = BIOS_67_PATH;
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break;
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case 5:
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romfn = BIOS_77_PATH;
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break;
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}
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rom_init(&oti->bios_rom, romfn,
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0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
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oti->vram_size = device_get_config_int("memory");
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oti->vram_mask = (oti->vram_size << 10) - 1;
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svga_init(&oti->svga, oti, oti->vram_size << 10,
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oti_recalctimings, oti_in, oti_out, NULL, NULL);
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io_sethandler(0x03c0, 32,
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oti_in, NULL, NULL, oti_out, NULL, NULL, oti);
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io_sethandler(0x46e8, 1, oti_pos_in,NULL,NULL, oti_pos_out,NULL,NULL, oti);
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oti->svga.miscout = 1;
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return(oti);
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}
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static void
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oti_close(void *p)
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{
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oti_t *oti = (oti_t *)p;
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svga_close(&oti->svga);
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free(oti);
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}
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static void
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oti_speed_changed(void *p)
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{
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oti_t *oti = (oti_t *)p;
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svga_recalctimings(&oti->svga);
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}
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static void
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oti_force_redraw(void *p)
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{
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oti_t *oti = (oti_t *)p;
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oti->svga.fullchange = changeframecount;
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}
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static void
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oti_add_status_info(char *s, int max_len, void *p)
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{
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oti_t *oti = (oti_t *)p;
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svga_add_status_info(s, max_len, &oti->svga);
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}
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static int
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oti067_available(void)
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{
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return(rom_present(BIOS_67_PATH));
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}
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static device_config_t oti067_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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static int
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oti077_available(void)
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{
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return(rom_present(BIOS_77_PATH));
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}
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static device_config_t oti077_config[] =
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{
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{
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"memory", "Memory size", CONFIG_SELECTION, "", 1024,
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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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device_t oti067_device =
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{
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"Oak OTI-067",
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DEVICE_ISA,
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2,
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oti_init, oti_close, NULL,
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oti067_available,
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oti_speed_changed,
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oti_force_redraw,
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oti_add_status_info,
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oti067_config
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};
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device_t oti077_device =
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{
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"Oak OTI-077",
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DEVICE_ISA,
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5,
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oti_init, oti_close, NULL,
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oti077_available,
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oti_speed_changed,
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oti_force_redraw,
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oti_add_status_info,
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oti077_config
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};
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