mirror/86Box
1
0
Fork 0
mirror of https://github.com/86Box/86Box.git synced 2026-02-24 20:35:32 -07:00
Code Issues Packages Projects Releases Activity
Files
8ced9eba653f2f5e6d7bf641f91abb42aae923fa
86Box/src/video/vid_et4000.c
TC1995 38e044ca34 Tseng Labs fixes and bug-compatible fixes too. 
ET3000AX: the chip in question should not support 1MB of video memory.
ET4000AX: the early TC6058AF revision can support 1MB of video memory (e.g.: Diamond Speedstar BIOS D3.10, undumped anyway), and actually don't update the rowoffset to 256 when using such chip in 320x200x256 mode. Fixes the copper demo in said chip revision.
2024-04-02 15:09:18 +02:00

1152 lines
40 KiB
C
Raw Blame History

/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Emulation of the Tseng Labs ET4000.
*
*
*
* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
* Miran Grca, <mgrca8@gmail.com>
* GreatPsycho, <greatpsycho@yahoo.com>
* Sarah Walker, <https://pcem-emulator.co.uk/>
*
* Copyright 2017-2018 Fred N. van Kempen.
* Copyright 2016-2018 Miran Grca.
* Copyright 2008-2018 Sarah Walker.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the:
*
* Free Software Foundation, Inc.
* 59 Temple Place - Suite 330
* Boston, MA 02111-1307
* USA.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <wchar.h>
#include <86box/86box.h>
#include <86box/io.h>
#include <86box/mca.h>
#include <86box/mem.h>
#include <86box/rom.h>
#include <86box/device.h>
#include <86box/timer.h>
#include <86box/video.h>
#include <86box/vid_svga.h>
#include <86box/vid_svga_render.h>
#include <86box/plat_fallthrough.h>
#include <86box/plat_unused.h>
#define ET4000_TYPE_TC6058AF 0 /* ISA ET4000AX (TC6058AF) */
#define ET4000_TYPE_ISA 1 /* ISA ET4000AX */
#define ET4000_TYPE_MCA 2 /* MCA ET4000AX */
#define ET4000_TYPE_KOREAN 3 /* Korean ET4000 */
#define ET4000_TYPE_TRIGEM 4 /* Trigem 286M ET4000 */
#define ET4000_TYPE_KASAN 5 /* Kasan ET4000 */
#define BIOS_ROM_PATH "roms/video/et4000/ET4000.BIN"
#define V8_06_BIOS_ROM_PATH "roms/video/et4000/ET4000_V8_06.BIN"
#define TC6058AF_BIOS_ROM_PATH "roms/video/et4000/Tseng_Labs_VGA-4000_BIOS_V1.1.bin"
#define V1_21_BIOS_ROM_PATH "roms/video/et4000/Tseng_Labs_VGA-4000_BIOS_V1.21.bin"
#define KOREAN_BIOS_ROM_PATH "roms/video/et4000/tgkorvga.bin"
#define KOREAN_FONT_ROM_PATH "roms/video/et4000/tg_ksc5601.rom"
#define KASAN_BIOS_ROM_PATH "roms/video/et4000/et4000_kasan16.bin"
#define KASAN_FONT_ROM_PATH "roms/video/et4000/kasan_ksc5601.rom"
typedef struct {
const char *name;
int type;
svga_t svga;
uint8_t pos_regs[8];
rom_t bios_rom;
uint8_t banking;
uint32_t vram_size,
vram_mask;
uint8_t port_22cb_val;
uint8_t port_32cb_val;
int get_korean_font_enabled;
int get_korean_font_index;
uint16_t get_korean_font_base;
uint8_t kasan_cfg_index;
uint8_t kasan_cfg_regs[16];
uint16_t kasan_access_addr;
uint8_t kasan_font_data[4];
} et4000_t;
static const uint8_t crtc_mask[0x40] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xff, 0xff, 0xff, 0x0f, 0xff, 0xff, 0xff, 0xff,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static video_timings_t timing_et4000_isa = { .type = VIDEO_ISA, .write_b = 3, .write_w = 3, .write_l = 6, .read_b = 5, .read_w = 5, .read_l = 10 };
static video_timings_t timing_et4000_mca = { .type = VIDEO_MCA, .write_b = 4, .write_w = 5, .write_l = 10, .read_b = 5, .read_w = 5, .read_l = 10 };
static void et4000_kasan_out(uint16_t addr, uint8_t val, void *priv);
static uint8_t et4000_kasan_in(uint16_t addr, void *priv);
static uint8_t
et4000_in(uint16_t addr, void *priv)
{
et4000_t *dev = (et4000_t *) priv;
svga_t *svga = &dev->svga;
uint8_t ret;
if (((addr & 0xfff0) == 0x3d0 || (addr & 0xfff0) == 0x3b0) && !(svga->miscout & 1))
addr ^= 0x60;
switch (addr) {
case 0x3c2:
if (dev->type == ET4000_TYPE_MCA) {
if ((svga->vgapal[0].r + svga->vgapal[0].g + svga->vgapal[0].b) >= 0x4e)
return 0;
else
return 0x10;
}
break;
case 0x3c5:
if ((svga->seqaddr & 0xf) == 7)
return svga->seqregs[svga->seqaddr & 0xf] | 4;
break;
case 0x3c6:
case 0x3c7:
case 0x3c8:
case 0x3c9:
if (dev->type >= ET4000_TYPE_ISA)
return sc1502x_ramdac_in(addr, svga->ramdac, svga);
case 0x3cd: /*Banking*/
return dev->banking;
case 0x3d4:
return svga->crtcreg;
case 0x3d5:
return svga->crtc[svga->crtcreg];
case 0x3da:
svga->attrff = 0;
if (svga->cgastat & 0x01)
svga->cgastat &= ~0x30;
else
svga->cgastat ^= 0x30;
ret = svga->cgastat;
if ((svga->fcr & 0x08) && svga->dispon)
ret |= 0x08;
if (ret & 0x08)
ret &= 0x7f;
else
ret |= 0x80;
return ret;
default:
break;
}
return svga_in(addr, svga);
}
static uint8_t
et4000k_in(uint16_t addr, void *priv)
{
et4000_t *dev = (et4000_t *) priv;
uint8_t val = 0xff;
switch (addr) {
case 0x22cb:
return dev->port_22cb_val;
case 0x22cf:
val = 0;
switch (dev->get_korean_font_enabled) {
case 3:
if ((dev->port_32cb_val & 0x30) == 0x30) {
val = fontdatksc5601[dev->get_korean_font_base].chr[dev->get_korean_font_index++];
dev->get_korean_font_index &= 0x1f;
} else if ((dev->port_32cb_val & 0x30) == 0x20 && (dev->get_korean_font_base & 0x7f) > 0x20 && (dev->get_korean_font_base & 0x7f) < 0x7f) {
switch (dev->get_korean_font_base & 0x3f80) {
case 0x2480:
if (dev->get_korean_font_index < 16)
val = fontdatksc5601_user[(dev->get_korean_font_base & 0x7f) - 0x20].chr[dev->get_korean_font_index];
else if (dev->get_korean_font_index >= 24 && dev->get_korean_font_index < 40)
val = fontdatksc5601_user[(dev->get_korean_font_base & 0x7f) - 0x20].chr[dev->get_korean_font_index - 8];
break;
case 0x3f00:
if (dev->get_korean_font_index < 16)
val = fontdatksc5601_user[96 + (dev->get_korean_font_base & 0x7f) - 0x20].chr[dev->get_korean_font_index];
else if (dev->get_korean_font_index >= 24 && dev->get_korean_font_index < 40)
val = fontdatksc5601_user[96 + (dev->get_korean_font_base & 0x7f) - 0x20].chr[dev->get_korean_font_index - 8];
break;
default:
break;
}
dev->get_korean_font_index++;
dev->get_korean_font_index %= 72;
}
break;
case 4:
val = 0x0f;
break;
default:
break;
}
return val;
case 0x32cb:
return dev->port_32cb_val;
default:
return et4000_in(addr, priv);
}
}
static void
et4000_out(uint16_t addr, uint8_t val, void *priv)
{
et4000_t *dev = (et4000_t *) priv;
svga_t *svga = &dev->svga;
uint8_t old;
uint8_t pal4to16[16] = { 0, 7, 0x38, 0x3f, 0, 3, 4, 0x3f, 0, 2, 4, 0x3e, 0, 3, 5, 0x3f };
if (((addr & 0xfff0) == 0x3d0 || (addr & 0xfff0) == 0x3b0) && !(svga->miscout & 1))
addr ^= 0x60;
switch (addr) {
case 0x3c0:
case 0x3c1:
if (!svga->attrff) {
svga->attraddr = val & 0x1f;
if ((val & 0x20) != svga->attr_palette_enable) {
svga->fullchange = 3;
svga->attr_palette_enable = val & 0x20;
svga_recalctimings(svga);
}
} else {
if ((svga->attraddr == 0x13) && (svga->attrregs[0x13] != val))
svga->fullchange = svga->monitor->mon_changeframecount;
old = svga->attrregs[svga->attraddr & 0x1f];
svga->attrregs[svga->attraddr & 0x1f] = val;
if (svga->attraddr < 0x10)
svga->fullchange = svga->monitor->mon_changeframecount;
if ((svga->attraddr == 0x10) || (svga->attraddr == 0x14) || (svga->attraddr < 0x10)) {
for (int c = 0; c < 0x10; c++) {
if (svga->attrregs[0x10] & 0x80)
svga->egapal[c] = (svga->attrregs[c] & 0xf) | ((svga->attrregs[0x14] & 0xf) << 4);
else if (svga->ati_4color)
svga->egapal[c] = pal4to16[(c & 0x03) | ((val >> 2) & 0xc)];
else
svga->egapal[c] = (svga->attrregs[c] & 0x3f) | ((svga->attrregs[0x14] & 0xc) << 4);
}
svga->fullchange = svga->monitor->mon_changeframecount;
}
/* Recalculate timings on change of attribute register 0x11
(overscan border color) too. */
if (svga->attraddr == 0x10) {
svga->chain4 &= ~0x02;
if ((val & 0x40) && (svga->attrregs[0x10] & 0x40))
svga->chain4 |= (svga->seqregs[0x0e] & 0x02);
if (old != val)
svga_recalctimings(svga);
} else if (svga->attraddr == 0x11) {
svga->overscan_color = svga->pallook[svga->attrregs[0x11]];
if (old != val)
svga_recalctimings(svga);
} else if (svga->attraddr == 0x12) {
if ((val & 0xf) != svga->plane_mask)
svga->fullchange = svga->monitor->mon_changeframecount;
svga->plane_mask = val & 0xf;
}
}
svga->attrff ^= 1;
return;
case 0x3c5:
if (svga->seqaddr == 4) {
svga->seqregs[4] = val;
svga->chain2_write = !(val & 4);
svga->chain4 = (svga->chain4 & ~8) | (val & 8);
svga->fast = (svga->gdcreg[8] == 0xff && !(svga->gdcreg[3] & 0x18) && !svga->gdcreg[1]) && svga->chain4 && !(svga->adv_flags & FLAG_ADDR_BY8);
return;
} else if (svga->seqaddr == 0x0e) {
svga->seqregs[0x0e] = val;
svga->chain4 &= ~0x02;
if ((svga->gdcreg[5] & 0x40) && svga->lowres)
svga->chain4 |= (svga->seqregs[0x0e] & 0x02);
svga_recalctimings(svga);
return;
}
break;
case 0x3c6:
case 0x3c7:
case 0x3c8:
case 0x3c9:
if (dev->type >= ET4000_TYPE_ISA) {
sc1502x_ramdac_out(addr, val, svga->ramdac, svga);
return;
}
break;
case 0x3cd: /*Banking*/
if (!(svga->crtc[0x36] & 0x10) && !(svga->gdcreg[6] & 0x08)) {
svga->write_bank = (val & 0xf) * 0x10000;
svga->read_bank = ((val >> 4) & 0xf) * 0x10000;
}
dev->banking = val;
return;
case 0x3cf:
if ((svga->gdcaddr & 15) == 5) {
svga->chain4 &= ~0x02;
if ((val & 0x40) && svga->lowres)
svga->chain4 |= (svga->seqregs[0x0e] & 0x02);
} else if ((svga->gdcaddr & 15) == 6) {
if (!(svga->crtc[0x36] & 0x10) && !(val & 0x08)) {
svga->write_bank = (dev->banking & 0x0f) * 0x10000;
svga->read_bank = ((dev->banking >> 4) & 0x0f) * 0x10000;
} else
svga->write_bank = svga->read_bank = 0;
old = svga->gdcreg[6];
svga_out(addr, val, svga);
if ((old & 0xc) != 0 && (val & 0xc) == 0) {
/*override mask - ET4000 supports linear 128k at A0000*/
svga->banked_mask = 0x1ffff;
}
return;
}
break;
case 0x3d4:
svga->crtcreg = val & 0x3f;
return;
case 0x3d5:
if ((svga->crtcreg < 7) && (svga->crtc[0x11] & 0x80))
return;
if ((svga->crtcreg == 0x35) && (svga->crtc[0x11] & 0x80))
return;
if ((svga->crtcreg == 7) && (svga->crtc[0x11] & 0x80))
val = (svga->crtc[7] & ~0x10) | (val & 0x10);
old = svga->crtc[svga->crtcreg];
val &= crtc_mask[svga->crtcreg];
svga->crtc[svga->crtcreg] = val;
if (svga->crtcreg == 0x36) {
if (!(val & 0x10) && !(svga->gdcreg[6] & 0x08)) {
svga->write_bank = (dev->banking & 0x0f) * 0x10000;
svga->read_bank = ((dev->banking >> 4) & 0x0f) * 0x10000;
} else
svga->write_bank = svga->read_bank = 0;
}
if (old != val) {
if (svga->crtcreg < 0xe || svga->crtcreg > 0x10) {
if ((svga->crtcreg == 0xc) || (svga->crtcreg == 0xd)) {
svga->fullchange = 3;
svga->ma_latch = ((svga->crtc[0xc] << 8) | svga->crtc[0xd]) + ((svga->crtc[8] & 0x60) >> 5);
} else {
svga->fullchange = changeframecount;
svga_recalctimings(svga);
}
}
}
break;
default:
break;
}
svga_out(addr, val, svga);
}
static void
et4000k_out(uint16_t addr, uint8_t val, void *priv)
{
et4000_t *dev = (et4000_t *) priv;
switch (addr) {
case 0x22cb:
dev->port_22cb_val = (dev->port_22cb_val & 0xf0) | (val & 0x0f);
dev->get_korean_font_enabled = val & 7;
if (dev->get_korean_font_enabled == 3)
dev->get_korean_font_index = 0;
break;
case 0x22cf:
switch (dev->get_korean_font_enabled) {
case 1:
dev->get_korean_font_base = ((val & 0x7f) << 7) | (dev->get_korean_font_base & 0x7f);
break;
case 2:
dev->get_korean_font_base = (dev->get_korean_font_base & 0x3f80) | (val & 0x7f) | (((val ^ 0x80) & 0x80) << 8);
break;
case 3:
if ((dev->port_32cb_val & 0x30) == 0x20 && (dev->get_korean_font_base & 0x7f) > 0x20 && (dev->get_korean_font_base & 0x7f) < 0x7f) {
switch (dev->get_korean_font_base & 0x3f80) {
case 0x2480:
if (dev->get_korean_font_index < 16)
fontdatksc5601_user[(dev->get_korean_font_base & 0x7f) - 0x20].chr[dev->get_korean_font_index] = val;
else if (dev->get_korean_font_index >= 24 && dev->get_korean_font_index < 40)
fontdatksc5601_user[(dev->get_korean_font_base & 0x7f) - 0x20].chr[dev->get_korean_font_index - 8] = val;
break;
case 0x3f00:
if (dev->get_korean_font_index < 16)
fontdatksc5601_user[96 + (dev->get_korean_font_base & 0x7f) - 0x20].chr[dev->get_korean_font_index] = val;
else if (dev->get_korean_font_index >= 24 && dev->get_korean_font_index < 40)
fontdatksc5601_user[96 + (dev->get_korean_font_base & 0x7f) - 0x20].chr[dev->get_korean_font_index - 8] = val;
break;
default:
break;
}
dev->get_korean_font_index++;
}
break;
default:
break;
}
break;
case 0x32cb:
dev->port_32cb_val = val;
svga_recalctimings(&dev->svga);
break;
default:
et4000_out(addr, val, priv);
break;
}
}
static uint8_t
et4000_kasan_in(uint16_t addr, void *priv)
{
const et4000_t *et4000 = (et4000_t *) priv;
uint8_t val = 0xFF;
if (addr == 0x258) {
val = et4000->kasan_cfg_index;
} else if (addr == 0x259) {
if (et4000->kasan_cfg_index >= 0xF0) {
val = et4000->kasan_cfg_regs[et4000->kasan_cfg_index - 0xF0];
if (et4000->kasan_cfg_index == 0xF4 && et4000->kasan_cfg_regs[0] & 0x20)
val |= 0x80;
}
} else if (addr >= et4000->kasan_access_addr && addr < et4000->kasan_access_addr + 8) {
switch (addr - ((et4000->kasan_cfg_regs[2] << 8) | (et4000->kasan_cfg_regs[1]))) {
case 2:
val = 0;
break;
case 5:
if (((et4000->get_korean_font_base >> 7) & 0x7F) == (et4000->svga.ksc5601_udc_area_msb[0] & 0x7F) && (et4000->svga.ksc5601_udc_area_msb[0] & 0x80))
val = fontdatksc5601_user[(et4000->get_korean_font_base & 0x7F) - 0x20].chr[et4000->get_korean_font_index];
else if (((et4000->get_korean_font_base >> 7) & 0x7F) == (et4000->svga.ksc5601_udc_area_msb[1] & 0x7F) && (et4000->svga.ksc5601_udc_area_msb[1] & 0x80))
val = fontdatksc5601_user[96 + (et4000->get_korean_font_base & 0x7F) - 0x20].chr[et4000->get_korean_font_index];
else
val = fontdatksc5601[et4000->get_korean_font_base].chr[et4000->get_korean_font_index];
break;
default:
break;
}
} else
val = et4000_in(addr, priv);
return val;
}
static void
et4000_kasan_out(uint16_t addr, uint8_t val, void *priv)
{
et4000_t *et4000 = (et4000_t *) priv;
if (addr == 0x258) {
et4000->kasan_cfg_index = val;
} else if (addr == 0x259) {
if (et4000->kasan_cfg_index >= 0xF0) {
switch (et4000->kasan_cfg_index - 0xF0) {
case 0:
if (et4000->kasan_cfg_regs[4] & 8)
val = (val & 0xFC) | (et4000->kasan_cfg_regs[0] & 3);
et4000->kasan_cfg_regs[0] = val;
svga_recalctimings(&et4000->svga);
break;
case 1:
case 2:
if ((et4000->kasan_cfg_index - 0xF0) <= 16)
et4000->kasan_cfg_regs[et4000->kasan_cfg_index - 0xF0] = val;
io_removehandler(et4000->kasan_access_addr, 0x0008, et4000_kasan_in, NULL, NULL, et4000_kasan_out, NULL, NULL, et4000);
et4000->kasan_access_addr = (et4000->kasan_cfg_regs[2] << 8) | et4000->kasan_cfg_regs[1];
io_sethandler(et4000->kasan_access_addr, 0x0008, et4000_kasan_in, NULL, NULL, et4000_kasan_out, NULL, NULL, et4000);
break;
case 4:
if (et4000->kasan_cfg_regs[0] & 0x20)
val |= 0x80;
et4000->svga.ksc5601_swap_mode = (val & 4) >> 2;
et4000->kasan_cfg_regs[4] = val;
svga_recalctimings(&et4000->svga);
break;
case 5:
et4000->kasan_cfg_regs[5] = val;
et4000->svga.ksc5601_english_font_type = 0x100 | val;
fallthrough;
case 6:
case 7:
et4000->svga.ksc5601_udc_area_msb[et4000->kasan_cfg_index - 0xF6] = val;
default:
et4000->kasan_cfg_regs[et4000->kasan_cfg_index - 0xF0] = val;
svga_recalctimings(&et4000->svga);
break;
}
}
} else if (addr >= et4000->kasan_access_addr && addr < et4000->kasan_access_addr + 8) {
switch (addr - ((et4000->kasan_cfg_regs[2] << 8) | (et4000->kasan_cfg_regs[1]))) {
case 0:
if (et4000->kasan_cfg_regs[0] & 2) {
et4000->get_korean_font_index = ((val & 1) << 4) | ((val & 0x1E) >> 1);
et4000->get_korean_font_base = (et4000->get_korean_font_base & ~7) | (val >> 5);
}
break;
case 1:
if (et4000->kasan_cfg_regs[0] & 2)
et4000->get_korean_font_base = (et4000->get_korean_font_base & ~0x7F8) | (val << 3);
break;
case 2:
if (et4000->kasan_cfg_regs[0] & 2)
et4000->get_korean_font_base = (et4000->get_korean_font_base & ~0x7F800) | ((val & 7) << 11);
break;
case 3:
case 4:
case 5:
if (et4000->kasan_cfg_regs[0] & 1) {
if ((addr - (((et4000->kasan_cfg_regs[2] << 8) | (et4000->kasan_cfg_regs[1])) + 3)) <= 4)
et4000->kasan_font_data[addr - (((et4000->kasan_cfg_regs[2] << 8) | (et4000->kasan_cfg_regs[1])) + 3)] = val;
}
break;
case 6:
if ((et4000->kasan_cfg_regs[0] & 1) && (et4000->kasan_font_data[3] & !(val & 0x80)) && (et4000->get_korean_font_base & 0x7F) >= 0x20 && (et4000->get_korean_font_base & 0x7F) < 0x7F) {
if (((et4000->get_korean_font_base >> 7) & 0x7F) == (et4000->svga.ksc5601_udc_area_msb[0] & 0x7F) && (et4000->svga.ksc5601_udc_area_msb[0] & 0x80))
fontdatksc5601_user[(et4000->get_korean_font_base & 0x7F) - 0x20].chr[et4000->get_korean_font_index] = et4000->kasan_font_data[2];
else if (((et4000->get_korean_font_base >> 7) & 0x7F) == (et4000->svga.ksc5601_udc_area_msb[1] & 0x7F) && (et4000->svga.ksc5601_udc_area_msb[1] & 0x80))
fontdatksc5601_user[96 + (et4000->get_korean_font_base & 0x7F) - 0x20].chr[et4000->get_korean_font_index] = et4000->kasan_font_data[2];
}
et4000->kasan_font_data[3] = val;
break;
default:
break;
}
} else
et4000_out(addr, val, priv);
}
uint32_t
get_et4000_addr(uint32_t addr, void *priv)
{
const svga_t *svga = (svga_t *) priv;
uint32_t nbank;
switch (svga->crtc[0x37] & 0x0B) {
case 0x00:
case 0x01:
nbank = 0;
addr &= 0xFFFF;
break;
case 0x02:
nbank = (addr & 1) << 1;
addr = (addr >> 1) & 0xFFFF;
break;
case 0x03:
nbank = addr & 3;
addr = (addr >> 2) & 0xFFFF;
break;
case 0x08:
case 0x09:
nbank = 0;
addr &= 0x3FFFF;
break;
case 0x0A:
nbank = (addr & 1) << 1;
addr = (addr >> 1) & 0x3FFFF;
break;
case 0x0B:
nbank = addr & 3;
addr = (addr >> 2) & 0x3FFFF;
break;
default:
nbank = 0;
break;
}
if (svga->vram_max >= 1024 * 1024) {
addr = (addr << 2) | (nbank & 3);
if ((svga->crtc[0x37] & 3) == 2)
addr >>= 1;
else if ((svga->crtc[0x37] & 3) < 2)
addr >>= 2;
} else if (svga->vram_max >= 512 * 1024) {
addr = (addr << 1) | ((nbank & 2) >> 1) | ((nbank & 1) << 19);
if ((svga->crtc[0x37] & 3) < 2)
addr >>= 1;
} else if (svga->vram_max >= 256 * 1024)
addr = addr | (nbank << 18);
else if (svga->vram_max > 128 * 1024) {
addr = (addr << 1) | ((nbank & 2) >> 1) | ((nbank & 1) << 17);
if ((svga->crtc[0x37] & 3) < 2)
addr >>= 1;
} else
addr = addr | (nbank << 16);
return addr;
}
static void
et4000_recalctimings(svga_t *svga)
{
const et4000_t *dev = (et4000_t *) svga->priv;
svga->ma_latch |= (svga->crtc[0x33] & 3) << 16;
svga->hblankstart = (((svga->crtc[0x3f] & 0x4) >> 2) << 8) + svga->crtc[2];
svga->ps_bit_bug = (dev->type == ET4000_TYPE_TC6058AF) && svga->lowres && ((svga->gdcreg[5] & 0x60) >= 0x40);
if (svga->crtc[0x35] & 1)
svga->vblankstart |= 0x400;
if (svga->crtc[0x35] & 2)
svga->vtotal |= 0x400;
if (svga->crtc[0x35] & 4)
svga->dispend |= 0x400;
if (svga->crtc[0x35] & 8)
svga->vsyncstart |= 0x400;
if (svga->crtc[0x35] & 0x10)
svga->split |= 0x400;
if (!svga->rowoffset && !svga->ps_bit_bug)
svga->rowoffset = 0x100;
if (svga->crtc[0x3f] & 1)
svga->htotal |= 0x100;
if (svga->attrregs[0x16] & 0x20) {
svga->hdisp <<= 1;
svga->dots_per_clock <<= 1;
}
switch (((svga->miscout >> 2) & 3) | ((svga->crtc[0x34] << 1) & 4)) {
case 0:
case 1:
break;
case 3:
svga->clock = (cpuclock * (double) (1ULL << 32)) / 40000000.0;
break;
case 5:
svga->clock = (cpuclock * (double) (1ULL << 32)) / 65000000.0;
break;
default:
svga->clock = (cpuclock * (double) (1ULL << 32)) / 36000000.0;
break;
}
switch (svga->bpp) {
case 15:
case 16:
svga->hdisp /= 2;
svga->dots_per_clock /= 2;
break;
case 24:
svga->hdisp /= 3;
svga->dots_per_clock /= 3;
break;
default:
break;
}
if (dev->type == ET4000_TYPE_KOREAN || dev->type == ET4000_TYPE_TRIGEM || dev->type == ET4000_TYPE_KASAN) {
if ((svga->render == svga_render_text_80) && ((svga->crtc[0x37] & 0x0A) == 0x0A)) {
if (dev->port_32cb_val & 0x80) {
svga->ma_latch -= 2;
svga->ca_adj = -2;
}
if ((dev->port_32cb_val & 0xB4) == ((svga->crtc[0x37] & 3) == 2 ? 0xB4 : 0xB0)) {
svga->render = svga_render_text_80_ksc5601;
}
}
}
if ((svga->bpp == 8) && ((svga->gdcreg[5] & 0x60) >= 0x40)) {
svga->map8 = svga->pallook;
if (svga->lowres)
svga->render = svga_render_8bpp_lowres;
else
svga->render = svga_render_8bpp_highres;
}
if ((svga->seqregs[0x0e] & 0x02) && ((svga->gdcreg[5] & 0x60) >= 0x40) && svga->lowres) {
svga->ma_latch <<= 1;
svga->rowoffset <<= 1;
svga->render = svga_render_8bpp_highres;
}
}
static void
et4000_kasan_recalctimings(svga_t *svga)
{
const et4000_t *et4000 = (et4000_t *) svga->priv;
et4000_recalctimings(svga);
if (svga->render == svga_render_text_80 && (et4000->kasan_cfg_regs[0] & 8)) {
svga->hdisp += svga->dots_per_clock;
svga->ma_latch -= 4;
svga->ca_adj = (et4000->kasan_cfg_regs[0] >> 6) - 3;
svga->ksc5601_sbyte_mask = (et4000->kasan_cfg_regs[0] & 4) << 5;
if ((et4000->kasan_cfg_regs[0] & 0x23) == 0x20 && (et4000->kasan_cfg_regs[4] & 0x80) && ((svga->crtc[0x37] & 0x0B) == 0x0A))
svga->render = svga_render_text_80_ksc5601;
}
}
static uint8_t
et4000_mca_read(int port, void *priv)
{
const et4000_t *et4000 = (et4000_t *) priv;
return (et4000->pos_regs[port & 7]);
}
static void
et4000_mca_write(int port, uint8_t val, void *priv)
{
et4000_t *et4000 = (et4000_t *) priv;
/* MCA does not write registers below 0x0100. */
if (port < 0x0102)
return;
/* Save the MCA register value. */
et4000->pos_regs[port & 7] = val;
}
static uint8_t
et4000_mca_feedb(UNUSED(void *priv))
{
return 1;
}
static void *
et4000_init(const device_t *info)
{
const char *bios_ver = NULL;
const char *fn;
et4000_t *dev;
int i;
dev = (et4000_t *) malloc(sizeof(et4000_t));
memset(dev, 0x00, sizeof(et4000_t));
dev->name = info->name;
dev->type = info->local;
fn = BIOS_ROM_PATH;
switch (dev->type) {
case ET4000_TYPE_TC6058AF: /* ISA ET4000AX (TC6058AF) */
case ET4000_TYPE_ISA: /* ISA ET4000AX */
dev->vram_size = device_get_config_int("memory") << 10;
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_et4000_isa);
svga_init(info, &dev->svga, dev, dev->vram_size,
et4000_recalctimings, et4000_in, et4000_out,
NULL, NULL);
io_sethandler(0x03c0, 32,
et4000_in, NULL, NULL, et4000_out, NULL, NULL, dev);
bios_ver = (char *) device_get_config_bios("bios_ver");
fn = (char *) device_get_bios_file(info, bios_ver, 0);
break;
case ET4000_TYPE_MCA: /* MCA ET4000AX */
dev->vram_size = 1024 << 10;
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_et4000_mca);
svga_init(info, &dev->svga, dev, dev->vram_size,
et4000_recalctimings, et4000_in, et4000_out,
NULL, NULL);
io_sethandler(0x03c0, 32,
et4000_in, NULL, NULL, et4000_out, NULL, NULL, dev);
dev->pos_regs[0] = 0xf2; /* ET4000 MCA board ID */
dev->pos_regs[1] = 0x80;
mca_add(et4000_mca_read, et4000_mca_write, et4000_mca_feedb, NULL, dev);
break;
case ET4000_TYPE_KOREAN: /* Korean ET4000 */
case ET4000_TYPE_TRIGEM: /* Trigem 286M ET4000 */
dev->vram_size = device_get_config_int("memory") << 10;
dev->port_22cb_val = 0x60;
dev->port_32cb_val = 0;
dev->svga.ksc5601_sbyte_mask = 0x80;
dev->svga.ksc5601_udc_area_msb[0] = 0xC9;
dev->svga.ksc5601_udc_area_msb[1] = 0xFE;
dev->svga.ksc5601_swap_mode = 0;
dev->svga.ksc5601_english_font_type = 0;
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_et4000_isa);
svga_init(info, &dev->svga, dev, dev->vram_size,
et4000_recalctimings, et4000k_in, et4000k_out,
NULL, NULL);
io_sethandler(0x03c0, 32,
et4000k_in, NULL, NULL, et4000k_out, NULL, NULL, dev);
io_sethandler(0x22cb, 1,
et4000k_in, NULL, NULL, et4000k_out, NULL, NULL, dev);
io_sethandler(0x22cf, 1,
et4000k_in, NULL, NULL, et4000k_out, NULL, NULL, dev);
io_sethandler(0x32cb, 1,
et4000k_in, NULL, NULL, et4000k_out, NULL, NULL, dev);
loadfont(KOREAN_FONT_ROM_PATH, 6);
fn = KOREAN_BIOS_ROM_PATH;
break;
case ET4000_TYPE_KASAN: /* Kasan ET4000 */
dev->vram_size = device_get_config_int("memory") << 10;
dev->svga.ksc5601_sbyte_mask = 0;
dev->svga.ksc5601_udc_area_msb[0] = 0xC9;
dev->svga.ksc5601_udc_area_msb[1] = 0xFE;
dev->svga.ksc5601_swap_mode = 0;
dev->svga.ksc5601_english_font_type = 0x1FF;
dev->kasan_cfg_index = 0;
for (i = 0; i < 16; i++)
dev->kasan_cfg_regs[i] = 0;
for (i = 0; i < 4; i++)
dev->kasan_font_data[i] = 0;
dev->kasan_cfg_regs[1] = 0x50;
dev->kasan_cfg_regs[2] = 2;
dev->kasan_cfg_regs[3] = 6;
dev->kasan_cfg_regs[4] = 0x78;
dev->kasan_cfg_regs[5] = 0xFF;
dev->kasan_cfg_regs[6] = 0xC9;
dev->kasan_cfg_regs[7] = 0xFE;
dev->kasan_access_addr = 0x250;
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_et4000_isa);
svga_init(info, &dev->svga, dev, dev->vram_size,
et4000_kasan_recalctimings, et4000_in, et4000_out,
NULL, NULL);
io_sethandler(0x03c0, 32,
et4000k_in, NULL, NULL, et4000k_out, NULL, NULL, dev);
io_sethandler(0x0250, 8,
et4000_kasan_in, NULL, NULL, et4000_kasan_out, NULL, NULL, dev);
io_sethandler(0x0258, 2,
et4000_kasan_in, NULL, NULL, et4000_kasan_out, NULL, NULL, dev);
loadfont(KASAN_FONT_ROM_PATH, 6);
fn = KASAN_BIOS_ROM_PATH;
break;
default:
break;
}
if (dev->type >= ET4000_TYPE_ISA)
dev->svga.ramdac = device_add(&sc1502x_ramdac_device);
dev->vram_mask = dev->vram_size - 1;
rom_init(&dev->bios_rom, fn,
0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
dev->svga.translate_address = get_et4000_addr;
dev->svga.packed_chain4 = 1;
return dev;
}
static void
et4000_close(void *priv)
{
et4000_t *dev = (et4000_t *) priv;
svga_close(&dev->svga);
free(dev);
}
static void
et4000_speed_changed(void *priv)
{
et4000_t *dev = (et4000_t *) priv;
svga_recalctimings(&dev->svga);
}
static void
et4000_force_redraw(void *priv)
{
et4000_t *dev = (et4000_t *) priv;
dev->svga.fullchange = changeframecount;
}
static int
et4000_available(void)
{
return rom_present(BIOS_ROM_PATH);
}
static int
et4000k_available(void)
{
return rom_present(KOREAN_BIOS_ROM_PATH) && rom_present(KOREAN_FONT_ROM_PATH);
}
static int
et4000_kasan_available(void)
{
return rom_present(KASAN_BIOS_ROM_PATH) && rom_present(KASAN_FONT_ROM_PATH);
}
static const device_config_t et4000_tc6058af_config[] = {
// clang-format off
{
.name = "memory",
.description = "Memory size",
.type = CONFIG_SELECTION,
.default_int = 512,
.selection = {
{
.description = "256 KB",
.value = 256
},
{
.description = "512 KB",
.value = 512
},
{
.description = "1 MB",
.value = 1024
},
{
.description = ""
}
}
},
{
.name = "bios_ver",
.description = "BIOS Version",
.type = CONFIG_BIOS,
.default_string = "v1_10",
.default_int = 0,
.file_filter = "",
.spinner = { 0 }, /*W1*/
.bios = {
{ .name = "Version 1.10", .internal_name = "v1_10", .bios_type = BIOS_NORMAL,
.files_no = 1, .local = 0, .size = 32768, .files = { TC6058AF_BIOS_ROM_PATH, "" } },
{ .name = "Version 1.21", .internal_name = "v1_21", .bios_type = BIOS_NORMAL,
.files_no = 1, .local = 0, .size = 32768, .files = { V1_21_BIOS_ROM_PATH, "" } },
{ .files_no = 0 }
},
},
{
.type = CONFIG_END
}
// clang-format on
};
static const device_config_t et4000_bios_config[] = {
// clang-format off
{
.name = "memory",
.description = "Memory size",
.type = CONFIG_SELECTION,
.default_int = 1024,
.selection = {
{
.description = "256 KB",
.value = 256
},
{
.description = "512 KB",
.value = 512
},
{
.description = "1 MB",
.value = 1024
},
{
.description = ""
}
}
},
{
.name = "bios_ver",
.description = "BIOS Version",
.type = CONFIG_BIOS,
.default_string = "v8_01",
.default_int = 0,
.file_filter = "",
.spinner = { 0 }, /*W1*/
.bios = {
{ .name = "Version 8.01", .internal_name = "v8_01", .bios_type = BIOS_NORMAL,
.files_no = 1, .local = 0, .size = 32768, .files = { BIOS_ROM_PATH, "" } },
{ .name = "Version 8.06", .internal_name = "v8_06", .bios_type = BIOS_NORMAL,
.files_no = 1, .local = 0, .size = 32768, .files = { V8_06_BIOS_ROM_PATH, "" } },
{ .files_no = 0 }
},
},
{
.type = CONFIG_END
}
// clang-format on
};
static const device_config_t et4000_config[] = {
// clang-format off
{
.name = "memory",
.description = "Memory size",
.type = CONFIG_SELECTION,
.default_int = 1024,
.selection = {
{
.description = "256 KB",
.value = 256
},
{
.description = "512 KB",
.value = 512
},
{
.description = "1 MB",
.value = 1024
},
{
.description = ""
}
}
},
{
.type = CONFIG_END
}
// clang-format on
};
const device_t et4000_tc6058af_isa_device = {
.name = "Tseng Labs ET4000AX (TC6058AF) (ISA)",
.internal_name = "et4000ax_tc6058af",
.flags = DEVICE_ISA,
.local = ET4000_TYPE_TC6058AF,
.init = et4000_init,
.close = et4000_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = et4000_speed_changed,
.force_redraw = et4000_force_redraw,
.config = et4000_tc6058af_config
};
const device_t et4000_isa_device = {
.name = "Tseng Labs ET4000AX (ISA)",
.internal_name = "et4000ax",
.flags = DEVICE_ISA,
.local = ET4000_TYPE_ISA,
.init = et4000_init,
.close = et4000_close,
.reset = NULL,
{ .available = NULL },
.speed_changed = et4000_speed_changed,
.force_redraw = et4000_force_redraw,
.config = et4000_bios_config
};
const device_t et4000_mca_device = {
.name = "Tseng Labs ET4000AX (MCA)",
.internal_name = "et4000mca",
.flags = DEVICE_MCA,
.local = ET4000_TYPE_MCA,
.init = et4000_init,
.close = et4000_close,
.reset = NULL,
{ .available = et4000_available },
.speed_changed = et4000_speed_changed,
.force_redraw = et4000_force_redraw,
.config = et4000_config
};
const device_t et4000k_isa_device = {
.name = "Trigem Korean VGA (Tseng Labs ET4000AX Korean)",
.internal_name = "tgkorvga",
.flags = DEVICE_ISA,
.local = ET4000_TYPE_KOREAN,
.init = et4000_init,
.close = et4000_close,
.reset = NULL,
{ .available = et4000k_available },
.speed_changed = et4000_speed_changed,
.force_redraw = et4000_force_redraw,
.config = et4000_config
};
const device_t et4000k_tg286_isa_device = {
.name = "Trigem Korean VGA (Trigem 286M)",
.internal_name = "et4000k_tg286_isa",
.flags = DEVICE_ISA,
.local = ET4000_TYPE_TRIGEM,
.init = et4000_init,
.close = et4000_close,
.reset = NULL,
{ .available = et4000k_available },
.speed_changed = et4000_speed_changed,
.force_redraw = et4000_force_redraw,
.config = et4000_config
};
const device_t et4000_kasan_isa_device = {
.name = "Kasan Hangulmadang-16 VGA (Tseng Labs ET4000AX Korean)",
.internal_name = "kasan16vga",
.flags = DEVICE_ISA,
.local = ET4000_TYPE_KASAN,
.init = et4000_init,
.close = et4000_close,
.reset = NULL,
{ .available = et4000_kasan_available },
.speed_changed = et4000_speed_changed,
.force_redraw = et4000_force_redraw,
.config = et4000_config
};
Reference in New Issue View Git Blame Copy Permalink