af03793533
Fixed the emulation of the Intel 82335 chip used by the Phoenix 386 clone; Fixed a bug regarding the CGA RGB monitor type; The IBM PS/1 Model 2121 with ISA is now acknowledged in mem.c.
370 lines
9.9 KiB
C
370 lines
9.9 KiB
C
/* Copyright holders: Sarah Walker, Tenshi
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see COPYING for more details
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*/
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/*Oak OTI067 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_oti067.h"
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#include "vid_svga.h"
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typedef struct oti067_t
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{
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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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} oti067_t;
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void oti067_out(uint16_t addr, uint8_t val, void *p)
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{
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oti067_t *oti067 = (oti067_t *)p;
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svga_t *svga = &oti067->svga;
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uint8_t old;
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// pclog("oti067_out : %04X %02X %02X %i\n", addr, val, ram[0x489], ins);
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if ((((addr&0xFFF0) == 0x3D0 || (addr&0xFFF0) == 0x3B0) && addr < 0x3de) && !(svga->miscout & 1)) 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 & 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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{
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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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case 0x3DE:
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oti067->index = val & 0x1f;
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return;
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case 0x3DF:
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oti067->regs[oti067->index] = val;
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switch (oti067->index)
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{
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case 0xD:
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svga->vrammask = (val & 0xc) ? oti067->vram_mask : 0x3ffff;
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if ((val & 0x80) && oti067->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->vrammask = 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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uint8_t oti067_in(uint16_t addr, void *p)
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{
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oti067_t *oti067 = (oti067_t *)p;
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svga_t *svga = &oti067->svga;
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uint8_t temp;
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// if (addr != 0x3da && addr != 0x3ba) pclog("oti067_in : %04X ", addr);
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if ((((addr&0xFFF0) == 0x3D0 || (addr&0xFFF0) == 0x3B0) && addr < 0x3de) && !(svga->miscout & 1)) 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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case 0x3DE:
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temp = oti067->index | (oti067->chip_id << 5);
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// temp = oti067->index | (2 << 5);
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break;
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case 0x3DF:
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if (oti067->index==0x10) temp = 0x18;
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else temp = oti067->regs[oti067->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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// if (addr != 0x3da && addr != 0x3ba) pclog("%02X %04X:%04X\n", temp, CS,pc);
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return temp;
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}
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void oti067_pos_out(uint16_t addr, uint8_t val, void *p)
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{
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oti067_t *oti067 = (oti067_t *)p;
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if ((val & 8) != (oti067->pos & 8))
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{
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if (val & 8)
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io_sethandler(0x03c0, 0x0020, oti067_in, NULL, NULL, oti067_out, NULL, NULL, oti067);
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else
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io_removehandler(0x03c0, 0x0020, oti067_in, NULL, NULL, oti067_out, NULL, NULL, oti067);
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}
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oti067->pos = val;
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}
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uint8_t oti067_pos_in(uint16_t addr, void *p)
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{
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oti067_t *oti067 = (oti067_t *)p;
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return oti067->pos;
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}
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void oti067_recalctimings(svga_t *svga)
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{
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oti067_t *oti067 = (oti067_t *)svga->p;
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if (oti067->regs[0x14] & 0x08) svga->ma_latch |= 0x10000;
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if (oti067->regs[0x0d] & 0x0c) svga->rowoffset <<= 1;
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// svga->interlace = oti067->regs[0x14] & 0x80;
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if (oti067->regs[0x14] & 0x80)
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{
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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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void *oti067_common_init(char *bios_fn, int vram_size, int chip_id)
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{
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oti067_t *oti067 = malloc(sizeof(oti067_t));
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memset(oti067, 0, sizeof(oti067_t));
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rom_init(&oti067->bios_rom, bios_fn, 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
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oti067->vram_size = vram_size;
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oti067->vram_mask = (vram_size << 10) - 1;
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oti067->chip_id = chip_id;
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svga_init(&oti067->svga, oti067, vram_size << 10,
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oti067_recalctimings,
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oti067_in, oti067_out,
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NULL,
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NULL);
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io_sethandler(0x03c0, 0x0020, oti067_in, NULL, NULL, oti067_out, NULL, NULL, oti067);
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io_sethandler(0x46e8, 0x0001, oti067_pos_in, NULL, NULL, oti067_pos_out, NULL, NULL, oti067);
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oti067->svga.miscout = 1;
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return oti067;
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}
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/* void *oti037_init()
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{
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int vram_size = device_get_config_int("memory");
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return oti067_common_init("roms/hyundai_oti037c.bin", vram_size, 0);
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} */
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void *oti067_init()
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{
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int vram_size = device_get_config_int("memory");
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return oti067_common_init("roms/oti067/bios.bin", vram_size, 2);
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}
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void *oti077_init()
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{
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int vram_size = device_get_config_int("memory");
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return oti067_common_init("roms/oti077.vbi", vram_size, 5);
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}
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void *oti067_acer386_init()
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{
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oti067_t *oti067 = oti067_common_init("roms/acer386/oti067.bin", 512, 2);
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/* if (oti067)
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oti067->bios_rom.rom[0x5d] = 0x74; */
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return oti067;
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}
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/* static int oti037_available()
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{
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return rom_present("roms/hyundai_oti037c.bin");
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} */
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static int oti067_available()
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{
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return rom_present("roms/oti067/bios.bin");
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}
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static int oti077_available()
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{
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return rom_present("roms/oti077.vbi");
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}
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void oti067_close(void *p)
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{
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oti067_t *oti067 = (oti067_t *)p;
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svga_close(&oti067->svga);
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free(oti067);
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}
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void oti067_speed_changed(void *p)
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{
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oti067_t *oti067 = (oti067_t *)p;
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svga_recalctimings(&oti067->svga);
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}
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void oti067_force_redraw(void *p)
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{
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oti067_t *oti067 = (oti067_t *)p;
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oti067->svga.fullchange = changeframecount;
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}
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void oti067_add_status_info(char *s, int max_len, void *p)
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{
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oti067_t *oti067 = (oti067_t *)p;
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svga_add_status_info(s, max_len, &oti067->svga);
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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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.name = "memory",
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.description = "Memory size",
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.type = CONFIG_SELECTION,
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.selection =
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{
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{
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.description = "256 kB",
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.value = 256
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},
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{
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.description = "512 kB",
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.value = 512
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},
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{
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.description = ""
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}
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},
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.default_int = 512
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},
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{
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.type = -1
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}
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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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.name = "memory",
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.description = "Memory size",
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.type = CONFIG_SELECTION,
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.selection =
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{
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{
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.description = "256 kB",
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.value = 256
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},
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{
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.description = "512 kB",
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.value = 512
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},
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{
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.description = "1 MB",
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.value = 1024
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},
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{
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.description = ""
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}
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},
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.default_int = 1024
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},
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{
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.type = -1
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}
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};
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/* device_t oti037_device =
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{
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"Oak OTI-037",
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0,
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oti037_init,
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oti067_close,
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oti037_available,
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oti067_speed_changed,
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oti067_force_redraw,
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oti067_add_status_info,
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oti067_config
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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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0,
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oti067_init,
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oti067_close,
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oti067_available,
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oti067_speed_changed,
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oti067_force_redraw,
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oti067_add_status_info,
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oti067_config
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};
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device_t oti067_acer386_device =
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{
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"Oak OTI-067 (Acermate 386SX/25N)",
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0,
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oti067_acer386_init,
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oti067_close,
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oti067_available,
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oti067_speed_changed,
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oti067_force_redraw,
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oti067_add_status_info
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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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0,
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oti077_init,
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oti067_close,
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oti077_available,
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oti067_speed_changed,
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oti067_force_redraw,
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oti067_add_status_info,
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oti077_config
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};
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