1055 lines
38 KiB
C
1055 lines
38 KiB
C
/*
|
|
* 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 JEGA (Japanese EGA), a part of the AX architecture.
|
|
*
|
|
* It's an extension of the SuperEGA. Superimposing text (AX-2) is not available.
|
|
*
|
|
* Authors: Akamaki
|
|
*
|
|
* Copyright 2025 Akamaki
|
|
*/
|
|
#include <stdarg.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#define HAVE_STDARG_H
|
|
#include <86box/86box.h>
|
|
#include "cpu.h"
|
|
#include <86box/io.h>
|
|
#include <86box/timer.h>
|
|
#include <86box/pic.h>
|
|
#include <86box/pit.h>
|
|
#include <86box/plat.h>
|
|
#include <86box/plat_fallthrough.h>
|
|
#include <86box/mem.h>
|
|
#include <86box/rom.h>
|
|
#include <86box/device.h>
|
|
#include <86box/video.h>
|
|
#include <86box/vid_ega.h>
|
|
#include <86box/vid_svga.h>
|
|
#include <86box/vid_vga.h>
|
|
|
|
/* JEGA internal registers */
|
|
#define RPESL 0x09 /* End Scan Line */
|
|
#define RCCSL 0x0A /* Cursor Start Line */
|
|
#define RCCEL 0x0B /* Cursor End Line */
|
|
#define RCCLH 0x0E /* Cursor Location High */
|
|
#define RCCLL 0x0F /* Cursor Location Low */
|
|
#define RPULP 0x14 /* Under Line Position */
|
|
/* + 0xB8 - 0x20 */
|
|
#define RMOD1 0x21 /* Display out, EGA through, Superimpose, Sync with EGA, Master EGA, Slave EGA, n/a, Test */
|
|
#define RMOD2 0x22 /* 1st Attr, 2nd Attr, Blink/Int, n/a, Font access mode (b3-2), Font map sel (b1-0)*/
|
|
#define RDAGS 0x23 /* ANK Group Select */
|
|
#define RDFFB 0x24 /* Font Access First Byte */
|
|
#define RDFSB 0x25 /* Font Access Second Byte */
|
|
#define RDFAP 0x26 /* Font Access Pattern */
|
|
#define RSTAT 0x27 /* Font Status Register */
|
|
/* + 0xD0 - 0x20 */
|
|
#define RPSSU 0x29 /* Start Scan Upper */
|
|
#define RPSSL 0x2A /* Start Scan Lower */
|
|
#define RPSSC 0x2B /* Start Scan Count */
|
|
#define RPPAJ 0x2C /* Phase Adjust Count */
|
|
#define RCMOD 0x2D /* Cursor Mode */
|
|
#define RCSKW 0x2E /* Cursor Skew Control */
|
|
#define ROMSL 0x2F /* ? */
|
|
#define RINVALID_INDEX 0x30
|
|
|
|
#define JEGA_PATH_BIOS "roms/video/jega/JEGABIOS.BIN"
|
|
#define JEGA_PATH_FONTDBCS "roms/video/jega/JPNZN16X.FNT"
|
|
#define IF386_PATH_VBIOS "roms/machines/if386sx/OKI_IF386SX_VBIOS.bin"
|
|
#define JVGA_PATH_BIOS "roms/video/jega/OKI_JVGT(AXVGAH)_BIOS_011993.BIN"
|
|
#define JVGA_PATH_FONTDBCS "roms/video/jega/JWPCE.FNT"
|
|
#define SBCS19_FILESIZE (256 * 19 * 2) /* 8 x 19 x 256 chr x 2 pages */
|
|
#define DBCS16_CHARS 0x2c10
|
|
#define DBCS16_FILESIZE (DBCS16_CHARS * 16 * 2)
|
|
|
|
#define INVALIDACCESS8 0xffu
|
|
#define INVALIDACCESS16 0xffffu
|
|
#define INVALIDACCESS32 0xffffffffu
|
|
|
|
#ifndef RELEASE_BUILD
|
|
// # define ENABLE_JEGA_LOG 1
|
|
#endif
|
|
|
|
#ifdef ENABLE_JEGA_LOG
|
|
int jega_do_log = ENABLE_JEGA_LOG;
|
|
|
|
static void
|
|
jega_log(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if (jega_do_log) {
|
|
va_start(ap, fmt);
|
|
pclog_ex(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
}
|
|
#else
|
|
# define jega_log(fmt, ...)
|
|
#endif
|
|
|
|
static video_timings_t timing_ega = { .type = VIDEO_ISA, .write_b = 8, .write_w = 16, .write_l = 32, .read_b = 8, .read_w = 16, .read_l = 32 };
|
|
|
|
typedef struct jega_t {
|
|
rom_t bios_rom;
|
|
ega_t ega;
|
|
vga_t vga;
|
|
uint8_t regs_index; /* 3D4/3D5 index B9-BF, D9-DF */
|
|
uint8_t regs[0x31];
|
|
uint8_t egapal[16];
|
|
uint8_t attrregs[32];
|
|
uint8_t attraddr;
|
|
uint8_t attrff;
|
|
uint8_t attr_palette_enable;
|
|
uint32_t *pallook;
|
|
int is_vga;
|
|
int cursorvisible;
|
|
int cursoron;
|
|
int cursorblink_disable;
|
|
int cursoraddr;
|
|
int font_index;
|
|
int sbcsbank_inv;
|
|
int attr3_sbcsbank;
|
|
int start_scan_lower;
|
|
int start_scan_upper;
|
|
int start_scan_count;
|
|
uint8_t * vram;
|
|
uint8_t jfont_sbcs_19[SBCS19_FILESIZE]; /* 8 x 19 font */
|
|
uint8_t jfont_dbcs_16[DBCS16_FILESIZE]; /* 16 x 16 font. Use dbcs_read/write to access it. */
|
|
} jega_t;
|
|
|
|
static void jega_recalctimings(void *priv);
|
|
|
|
#define FONTX_LEN_ID 6
|
|
#define FONTX_LEN_FN 8
|
|
|
|
typedef struct {
|
|
char id[FONTX_LEN_ID];
|
|
char name[FONTX_LEN_FN];
|
|
uint8_t width;
|
|
uint8_t height;
|
|
uint8_t type;
|
|
} fontx_h;
|
|
|
|
typedef struct {
|
|
uint16_t start;
|
|
uint16_t end;
|
|
} fontx_tbl;
|
|
|
|
extern uint32_t pallook16[256];
|
|
extern uint32_t pallook64[256];
|
|
static bool is_SJIS_1(uint8_t chr) { return (chr >= 0x81 && chr <= 0x9f) || (chr >= 0xe0 && chr <= 0xfc); }
|
|
static bool is_SJIS_2(uint8_t chr) { return (chr >= 0x40 && chr <= 0x7e) || (chr >= 0x80 && chr <= 0xfc); }
|
|
|
|
static uint8_t jega_in(uint16_t addr, void *priv);
|
|
|
|
static uint16_t
|
|
SJIS_to_SEQ(uint16_t sjis)
|
|
{
|
|
uint32_t chr1 = (sjis >> 8) & 0xff;
|
|
uint32_t chr2 = sjis & 0xff;
|
|
|
|
if (!is_SJIS_1(chr1) || !is_SJIS_2(chr2))
|
|
return INVALIDACCESS16;
|
|
|
|
chr1 -= 0x81;
|
|
|
|
if (chr1 > 0x5e)
|
|
chr1 -= 0x40;
|
|
|
|
chr2 -= 0x40;
|
|
|
|
if (chr2 > 0x3f)
|
|
chr2--;
|
|
|
|
chr1 *= 0xbc;
|
|
|
|
return (chr1 + chr2);
|
|
}
|
|
|
|
static uint8_t
|
|
dbcs_read(uint16_t sjis, int index, void *priv) {
|
|
jega_t *jega = (jega_t *) priv;
|
|
int seq = SJIS_to_SEQ(sjis);
|
|
if ((seq >= DBCS16_CHARS) || (index >= 32))
|
|
return INVALIDACCESS8;
|
|
return jega->jfont_dbcs_16[seq * 32 + index];
|
|
}
|
|
|
|
static void
|
|
dbcs_write(uint16_t sjis, int index, uint8_t val, void *priv) {
|
|
jega_t *jega = (jega_t *) priv;
|
|
int seq = SJIS_to_SEQ(sjis);
|
|
if ((seq >= DBCS16_CHARS) || (index >= 32))
|
|
return;
|
|
jega->jfont_dbcs_16[seq * 32 + index] = val;
|
|
}
|
|
|
|
/* Display Adapter Mode 3 Drawing */
|
|
void
|
|
jega_render_text(void *priv)
|
|
{
|
|
jega_t * jega = (jega_t *) priv;
|
|
#ifdef USE_DOUBLE_WIDTH_AND_LINE_CHARS
|
|
uint8_t * seqregs = jega->is_vga ? jega->vga.svga.seqregs :
|
|
jega->ega.seqregs;
|
|
uint8_t * attrregs = jega->is_vga ? jega->vga.svga.attrregs :
|
|
jega->ega.attrregs;
|
|
#endif
|
|
uint8_t * crtc = jega->is_vga ? jega->vga.svga.crtc :
|
|
jega->ega.crtc;
|
|
uint8_t * vram = jega->is_vga ? jega->vga.svga.vram :
|
|
jega->ega.vram;
|
|
int * firstline_draw = jega->is_vga ? &jega->vga.svga.firstline_draw :
|
|
&jega->ega.firstline_draw;
|
|
int * lastline_draw = jega->is_vga ? &jega->vga.svga.lastline_draw :
|
|
&jega->ega.lastline_draw;
|
|
int * displine = jega->is_vga ? &jega->vga.svga.displine :
|
|
&jega->ega.displine;
|
|
int * fullchange = jega->is_vga ? &jega->vga.svga.fullchange :
|
|
&jega->ega.fullchange;
|
|
int * blink = jega->is_vga ? &jega->vga.svga.blink :
|
|
&jega->ega.blink;
|
|
int * x_add = jega->is_vga ? &jega->vga.svga.x_add :
|
|
&jega->ega.x_add;
|
|
int * y_add = jega->is_vga ? &jega->vga.svga.y_add :
|
|
&jega->ega.y_add;
|
|
int * sc = jega->is_vga ? &jega->vga.svga.scanline :
|
|
&jega->ega.scanline;
|
|
int * hdisp = jega->is_vga ? &jega->vga.svga.hdisp :
|
|
&jega->ega.hdisp;
|
|
int * scrollcache = jega->is_vga ? &jega->vga.svga.scrollcache :
|
|
&jega->ega.scrollcache;
|
|
uint32_t *memaddr = jega->is_vga ? &jega->vga.svga.memaddr :
|
|
&jega->ega.memaddr;
|
|
uint8_t mask = jega->is_vga ? jega->vga.svga.dac_mask : 0xff;
|
|
|
|
if (*firstline_draw == 2000)
|
|
*firstline_draw = *displine;
|
|
*lastline_draw = *displine;
|
|
|
|
if (*fullchange) {
|
|
#ifdef USE_DOUBLE_WIDTH_AND_LINE_CHARS
|
|
const bool doublewidth = ((seqregs[1] & 8) != 0);
|
|
const bool attrlinechars = (attrregs[0x10] & 4);
|
|
#endif
|
|
const bool attrblink = ((jega->regs[RMOD2] & 0x20) == 0); /* JEGA specific */
|
|
const bool crtcreset = ((crtc[0x17] & 0x80) == 0) || ((jega->regs[RMOD1] & 0x80) == 0);
|
|
const int charwidth = 8;
|
|
const bool blinked = *blink & 0x10;
|
|
uint32_t *p = &buffer32->line[*displine + *y_add][*x_add];
|
|
bool chr_wide = false;
|
|
int sc_wide = *sc - jega->start_scan_count;
|
|
const bool cursoron = (blinked || jega->cursorblink_disable) &&
|
|
(*sc >= jega->regs[RCCSL]) && (*sc <= jega->regs[RCCEL]);
|
|
uint32_t attr_basic = 0;
|
|
uint32_t chr_first;
|
|
int fg = 0;
|
|
int bg;
|
|
|
|
for (int x = 0; x < (*hdisp + *scrollcache); x += charwidth) {
|
|
uint32_t addr = 0;
|
|
|
|
if (jega->is_vga) {
|
|
if (!jega->vga.svga.force_old_addr)
|
|
addr = jega->vga.svga.remap_func(&jega->vga.svga, jega->vga.svga.memaddr) &
|
|
jega->vga.svga.vram_display_mask;
|
|
} else
|
|
addr = jega->ega.remap_func(&jega->ega, *memaddr) & jega->ega.vrammask;
|
|
|
|
int drawcursor = ((*memaddr == jega->cursoraddr) && cursoron);
|
|
|
|
uint32_t chr;
|
|
uint32_t attr;
|
|
if (!crtcreset) {
|
|
chr = vram[addr];
|
|
attr = vram[addr + 1];
|
|
} else
|
|
chr = attr = 0;
|
|
if (chr_wide) {
|
|
uint8_t attr_ext = 0;
|
|
/* the code may be in DBCS */
|
|
if (jega->regs[RMOD2] & 0x40) {
|
|
/* Parse JEGA extended attribute */
|
|
/* Bold | 2x width | 2x height | U/L select | R/L select | - | - | - */
|
|
attr_ext = attr;
|
|
if ((attr_ext & 0x30) == 0x30)
|
|
sc_wide = *sc - jega->start_scan_lower; /* Set top padding of lower 2x character */
|
|
else if ((attr_ext & 0x30) == 0x20)
|
|
sc_wide = *sc - jega->start_scan_upper; /* Set top padding of upper 2x character */
|
|
else
|
|
sc_wide = *sc - jega->start_scan_count;
|
|
}
|
|
if (is_SJIS_2(chr) && sc_wide >= 0 && sc_wide < 16 && *sc <= jega->regs[RPESL]) {
|
|
chr_first <<= 8;
|
|
chr |= chr_first;
|
|
/* Vertical wide font (Extended Attribute) */
|
|
if (attr_ext & 0x20) {
|
|
if (attr_ext & 0x10)
|
|
sc_wide = (sc_wide >> 1) + 8;
|
|
else
|
|
sc_wide = sc_wide >> 1;
|
|
}
|
|
/* Horizontal wide font (Extended Attribute) */
|
|
if (attr_ext & 0x40) {
|
|
uint32_t dat = dbcs_read(chr, sc_wide, jega);
|
|
if (!(attr_ext & 0x08)) { /* right half of character */
|
|
dat = dbcs_read(chr, sc_wide + 16, jega);
|
|
}
|
|
for (int xx = 0; xx < charwidth; xx++) {
|
|
p[xx * 2] = (dat & (0x80 >> xx)) ? fg : bg;
|
|
p[xx * 2 + 1] = (dat & (0x80 >> xx)) ? fg : bg;
|
|
}
|
|
} else {
|
|
uint32_t dat = dbcs_read(chr, sc_wide, jega);
|
|
dat <<= 8;
|
|
dat |= dbcs_read(chr, sc_wide + 16, jega);
|
|
/* Bold (Extended Attribute) */
|
|
if (attr_ext &= 0x80) {
|
|
uint32_t dat2 = dat;
|
|
dat2 >>= 1;
|
|
dat |= dat2;
|
|
}
|
|
for (int xx = 0; xx < charwidth * 2; xx++)
|
|
p[xx] = (dat & (0x8000 >> xx)) ? fg : bg;
|
|
}
|
|
} else {
|
|
/* invalid DBCS code or line space then put blank */
|
|
for (int xx = 0; xx < charwidth * 2; xx++)
|
|
p[xx] = bg;
|
|
}
|
|
if (attr_basic & 0x20) { /* vertical line */
|
|
p[0] = fg;
|
|
}
|
|
if ((*sc == jega->regs[RPULP]) && (attr_basic & 0x10)) { /* underline */
|
|
for (int xx = 0; xx < charwidth * 2; xx++)
|
|
p[xx] = fg;
|
|
}
|
|
chr_wide = false;
|
|
p += (charwidth * 2);
|
|
} else {
|
|
/* SBCS or invalid second byte of DBCS */
|
|
if (jega->regs[RMOD2] & 0x80) {
|
|
/* Parse attribute as JEGA */
|
|
/* Blink | Reverse | V line | U line | (Bit 3-0 is the same as EGA) */
|
|
/* The background color is always black (transparent in AX-2) */
|
|
if (drawcursor || attr & 0x40) {
|
|
bg = jega->pallook[jega->egapal[attr & 0x0f]];
|
|
fg = 0;
|
|
} else {
|
|
fg = jega->pallook[jega->egapal[attr & 0x0f]];
|
|
bg = 0;
|
|
if (attr & 0x80) {
|
|
bg = 0;
|
|
if (blinked)
|
|
fg = bg;
|
|
}
|
|
}
|
|
attr_basic = attr;
|
|
} else {
|
|
/* Parse attribute as EGA */
|
|
/* BInt/Blink | BR | BG | BB | Int/Group | R | G | B */
|
|
if (drawcursor) {
|
|
bg = jega->pallook[jega->egapal[attr & 0x0f] & mask];
|
|
fg = jega->pallook[jega->egapal[attr >> 4] & mask];
|
|
} else {
|
|
fg = jega->pallook[jega->egapal[attr & 0x0f] & mask];
|
|
bg = jega->pallook[jega->egapal[attr >> 4] & mask];
|
|
if ((attr & 0x80) && attrblink) {
|
|
bg = jega->pallook[jega->egapal[(attr >> 4) & 7] & mask];
|
|
if (blinked)
|
|
fg = bg;
|
|
}
|
|
}
|
|
attr_basic = 0;
|
|
}
|
|
|
|
if (is_SJIS_1(chr)) {
|
|
/* the char code maybe in DBCS */
|
|
chr_first = chr;
|
|
chr_wide = true;
|
|
} else {
|
|
/* the char code is in SBCS */
|
|
uint32_t charaddr = chr;
|
|
// if (jega->attr3_sbcsbank && (attr & 8))
|
|
// charaddr |= 0x100;
|
|
// if (jega->sbcsbank_inv)
|
|
// charaddr ^= 0x100;
|
|
charaddr *= 19;
|
|
|
|
uint32_t dat = jega->jfont_sbcs_19[charaddr + *sc];
|
|
for (int xx = 0; xx < charwidth; xx++)
|
|
p[xx] = (dat & (0x80 >> xx)) ? fg : bg;
|
|
|
|
if (attr_basic & 0x20) { /* vertical line */
|
|
p[0] = fg;
|
|
}
|
|
if ((*sc == jega->regs[RPULP]) && (attr_basic & 0x10)) { /* underline */
|
|
for (int xx = 0; xx < charwidth; xx++)
|
|
p[xx] = fg;
|
|
}
|
|
p += charwidth;
|
|
}
|
|
}
|
|
*memaddr += 4;
|
|
}
|
|
*memaddr &= 0x3ffff;
|
|
}
|
|
}
|
|
|
|
static void
|
|
jega_out(uint16_t addr, uint8_t val, void *priv)
|
|
{
|
|
jega_t *jega = (jega_t *) priv;
|
|
uint8_t pal4to16[16] = { 0, 7, 0x38, 0x3f, 0, 3, 4, 0x3f, 0, 2, 4, 0x3e, 0, 3, 5, 0x3f };
|
|
uint16_t chr;
|
|
|
|
// jega_log("JEGA Out %04X %02X(%d) %04X:%04X\n", addr, val, val, cs >> 4, cpu_state.pc);
|
|
|
|
switch (addr) {
|
|
case 0x3c0:
|
|
case 0x3c1:
|
|
jega_log("Palette %02X %02X(%d) %04X:%04X\n", jega->attraddr, val, val, cs >> 4, cpu_state.pc);
|
|
/* Palette (write only) */
|
|
if (!jega->attrff) {
|
|
jega->attraddr = val & 31;
|
|
if ((val & 0x20) != jega->attr_palette_enable) {
|
|
if (jega->is_vga)
|
|
jega->vga.svga.fullchange = 3;
|
|
else
|
|
jega->ega.fullchange = 3;
|
|
jega->attr_palette_enable = val & 0x20;
|
|
jega_recalctimings(jega);
|
|
}
|
|
} else {
|
|
jega->attrregs[jega->attraddr & 31] = val;
|
|
int is_attr14 = jega->is_vga ? (jega->attraddr == 0x14) : 0;
|
|
if (is_attr14 || (jega->attraddr < 0x10)) {
|
|
for (uint8_t c = 0; c < 16; c++) {
|
|
if (jega->is_vga) {
|
|
if (jega->attrregs[0x10] & 0x80)
|
|
jega->egapal[c] = (jega->attrregs[c] & 0xf) | ((jega->attrregs[0x14] & 0xf) << 4);
|
|
else if (jega->vga.svga.ati_4color)
|
|
jega->egapal[c] = pal4to16[(c & 0x03) | ((val >> 2) & 0xc)];
|
|
else
|
|
jega->egapal[c] = (jega->attrregs[c] & 0x3f) | ((jega->attrregs[0x14] & 0xc) << 4);
|
|
} else
|
|
jega->egapal[c] = jega->attrregs[c] & 0x3f;
|
|
}
|
|
if (jega->is_vga)
|
|
jega->vga.svga.fullchange = changeframecount;
|
|
else
|
|
jega->ega.fullchange = changeframecount;
|
|
}
|
|
}
|
|
jega->attrff ^= 1;
|
|
break;
|
|
case 0x3c2:
|
|
if (jega->regs[RMOD1] & 0x0c) {
|
|
io_removehandler(0x03a0, 0x0020, jega_in, NULL, NULL, jega_out, NULL, NULL, jega);
|
|
if (!(val & 1))
|
|
io_sethandler(0x03a0, 0x0020, jega_in, NULL, NULL, jega_out, NULL, NULL, jega);
|
|
}
|
|
break;
|
|
case 0x3b4:
|
|
case 0x3d4:
|
|
/* Index 0x00-0x1F (write only), 0xB8-0xDF (write and read) */
|
|
if (val >= 0xB8 && val <= 0xBF)
|
|
jega->regs_index = val - 0xB8 + 0x20;
|
|
else if (val >= 0xD8 && val <= 0xDF)
|
|
jega->regs_index = val - 0xD0 + 0x20;
|
|
else if (val <= 0x1F)
|
|
jega->regs_index = val;
|
|
else
|
|
jega->regs_index = RINVALID_INDEX;
|
|
break;
|
|
case 0x3b5:
|
|
case 0x3d5:
|
|
/* Data */
|
|
if (jega->regs_index != RINVALID_INDEX) {
|
|
if ((jega->regs_index < 7) && (jega->regs[0x11] & 0x80))
|
|
return;
|
|
if ((jega->regs_index == 7) && (jega->regs[0x11] & 0x80))
|
|
val = (jega->regs[7] & ~0x10) | (val & 0x10);
|
|
/*
|
|
Do not allow cursor updates if neither master nor slave is
|
|
active - the AX Windows 3.0 386 Enhanced Mode DOS grabber
|
|
relies on this for the cursor position to behave correctly.
|
|
*/
|
|
if ((jega->regs_index >= 0x0e) && (jega->regs_index <= 0x0f) && !(jega->regs[RMOD1] & 0x0c))
|
|
return;
|
|
jega->regs[jega->regs_index] = val;
|
|
jega_log("JEGA Out %04X(%02X) %02Xh(%d) %04X:%04X\n", addr, jega->regs_index, val, val, cs >> 4, cpu_state.pc);
|
|
switch (jega->regs_index) {
|
|
case RMOD1:
|
|
/* if the value is changed */
|
|
/*
|
|
Do not allow override toggling unless it's on master and
|
|
only override the text renderer - the AX Windows 3.0 386
|
|
Enhanced Mode DOS grabber relies on this for the grabbing
|
|
to behave correctly.
|
|
*/
|
|
if (val & 0x08) {
|
|
if (jega->is_vga) {
|
|
if (val & 0x40)
|
|
jega->vga.svga.render_override = NULL;
|
|
else
|
|
jega->vga.svga.render_override = jega_render_text;
|
|
} else {
|
|
if (val & 0x40)
|
|
jega->ega.render_override = NULL;
|
|
else
|
|
jega->ega.render_override = jega_render_text;
|
|
}
|
|
}
|
|
break;
|
|
case RDAGS:
|
|
switch (val & 0x03) {
|
|
case 0x00:
|
|
jega->attr3_sbcsbank = false;
|
|
jega->sbcsbank_inv = false;
|
|
break;
|
|
case 0x01:
|
|
jega->attr3_sbcsbank = true;
|
|
jega->sbcsbank_inv = false;
|
|
break;
|
|
case 0x02:
|
|
jega->attr3_sbcsbank = true;
|
|
jega->sbcsbank_inv = true;
|
|
break;
|
|
case 0x03:
|
|
jega->attr3_sbcsbank = false;
|
|
jega->sbcsbank_inv = true;
|
|
break;
|
|
}
|
|
break;
|
|
case RCCLH:
|
|
case RCCLL:
|
|
jega->cursoraddr = jega->regs[RCCLH] << 10 | jega->regs[RCCLL] << 2;
|
|
break;
|
|
case RCMOD:
|
|
jega->cursoron = (val & 0x80);
|
|
jega->cursorblink_disable = (~val & 0x20);
|
|
break;
|
|
case RDFFB:
|
|
case RDFSB:
|
|
/* reset the line number */
|
|
jega->font_index = 0;
|
|
break;
|
|
case RPSSC:
|
|
if (val <= 17)
|
|
jega->start_scan_count = val + 1;
|
|
else
|
|
jega->start_scan_count = (val - 32) + 1;
|
|
break;
|
|
case RPSSL:
|
|
jega->start_scan_lower = val - 15;
|
|
break;
|
|
case RPSSU:
|
|
if (val <= 33)
|
|
jega->start_scan_upper = val + 4;
|
|
else
|
|
jega->start_scan_upper = (val - 64) + 4;
|
|
break;
|
|
case RDFAP:
|
|
chr = jega->regs[RDFFB];
|
|
if (is_SJIS_1(chr) && chr >= 0xf0 && chr <= 0xf3) {
|
|
chr <<= 8;
|
|
chr |= jega->regs[RDFSB];
|
|
if (jega->font_index < 32)
|
|
dbcs_write(chr, jega->font_index, val, jega);
|
|
} else {
|
|
if (jega->font_index <19)
|
|
jega->jfont_sbcs_19[chr * 19 + jega->font_index] = val;
|
|
}
|
|
jega_log("JEGA Font W %X %d %02Xh(%d) %04X:%04X\n", chr, jega->font_index, val, val, cs >> 4, cpu_state.pc);
|
|
jega->font_index++;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Accessing to Slave EGA is redirected to Master in AX-1. */
|
|
if (jega->regs[RMOD1] & 0x0c) {
|
|
if (jega->is_vga)
|
|
vga_out(addr, val, &jega->vga);
|
|
else
|
|
ega_out(addr, val, &jega->ega);
|
|
}
|
|
}
|
|
|
|
static uint8_t
|
|
jega_in(uint16_t addr, void *priv)
|
|
{
|
|
jega_t *jega = (jega_t *) priv;
|
|
uint8_t ret = INVALIDACCESS8;
|
|
uint16_t chr;
|
|
|
|
switch (addr) {
|
|
case 0x3b5:
|
|
case 0x3d5:
|
|
if (jega->regs_index >= 0x20 && jega->regs_index <= 0x2F) {
|
|
switch (jega->regs_index) {
|
|
case RDFAP:
|
|
chr = jega->regs[RDFFB];
|
|
/* DBCS or SBCS */
|
|
if (is_SJIS_1(chr)) {
|
|
chr <<= 8;
|
|
chr |= jega->regs[RDFSB];
|
|
if (jega->font_index < 32)
|
|
ret = dbcs_read(chr, jega->font_index, jega);
|
|
} else {
|
|
if (jega->font_index < 19)
|
|
ret = jega->jfont_sbcs_19[chr * 19 + jega->font_index];
|
|
}
|
|
jega_log("JEGA Font R %X %d %02Xh(%d) %04X:%04X\n", chr, jega->font_index, ret, ret, cs >> 4, cpu_state.pc);
|
|
jega->font_index++;
|
|
break;
|
|
case RSTAT:
|
|
ret = 0x03;
|
|
break;
|
|
default:
|
|
ret = jega->regs[jega->regs_index];
|
|
break;
|
|
}
|
|
jega_log("JEGA In %04X(%02X) %02X %04X:%04X\n", addr, jega->regs_index, ret, cs >> 4, cpu_state.pc);
|
|
} else if (jega->regs[RMOD1] & 0x0c) {
|
|
/* Accessing to Slave EGA is redirected to Master in AX-1. */
|
|
if (jega->is_vga)
|
|
ret = vga_in(addr, &jega->vga);
|
|
else
|
|
ret = ega_in(addr, &jega->ega);
|
|
}
|
|
break;
|
|
case 0x3ba:
|
|
case 0x3da:
|
|
jega->attrff = 0;
|
|
fallthrough;
|
|
default:
|
|
/* Accessing to Slave is redirected to Master in AX-1. */
|
|
if (jega->regs[RMOD1] & 0x0c) {
|
|
if (jega->is_vga)
|
|
ret = vga_in(addr, &jega->vga);
|
|
else
|
|
ret = ega_in(addr, &jega->ega);
|
|
}
|
|
break;
|
|
}
|
|
// jega_log("JEGA In %04X(%02X) %02X %04X:%04X\n", addr, jega->regs_index, ret, cs >> 4, cpu_state.pc);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
getfontx2header(FILE *fp, fontx_h *header)
|
|
{
|
|
fread(header->id, FONTX_LEN_ID, 1, fp);
|
|
if (strncmp(header->id, "FONTX2", FONTX_LEN_ID) != 0) {
|
|
return 1;
|
|
}
|
|
fread(header->name, FONTX_LEN_FN, 1, fp);
|
|
header->width = (uint8_t) getc(fp);
|
|
header->height = (uint8_t) getc(fp);
|
|
header->type = (uint8_t) getc(fp);
|
|
return 0;
|
|
}
|
|
|
|
static uint16_t
|
|
chrtosht(FILE *fp)
|
|
{
|
|
uint16_t i, j;
|
|
i = (uint16_t) getc(fp);
|
|
j = (uint16_t) getc(fp) << 8;
|
|
return (i | j);
|
|
}
|
|
|
|
static void
|
|
readfontxtbl(fontx_tbl *table, int size, FILE *fp)
|
|
{
|
|
while (size > 0) {
|
|
table->start = chrtosht(fp);
|
|
table->end = chrtosht(fp);
|
|
++table;
|
|
--size;
|
|
}
|
|
}
|
|
|
|
static int
|
|
LoadFontxFile(const char *fn, void *priv)
|
|
{
|
|
fontx_h fhead;
|
|
fontx_tbl *ftbl;
|
|
uint16_t code;
|
|
uint16_t scode;
|
|
uint8_t size;
|
|
uint8_t buf;
|
|
int line;
|
|
jega_t *jega = (jega_t *) priv;
|
|
FILE *fp = rom_fopen(fn, "rb");
|
|
jega_log("JEGA: Loading font\n");
|
|
if (fp == NULL) {
|
|
jega_log("JEGA: font file '%s' not found.\n", fn);
|
|
return 0;
|
|
}
|
|
if (getfontx2header(fp, &fhead) != 0) {
|
|
fclose(fp);
|
|
jega_log("JEGA: FONTX2 header is incorrect.\n");
|
|
return 1;
|
|
}
|
|
/* DBCS or SBCS */
|
|
if (fhead.type == 1) {
|
|
if (fhead.width == 16 && fhead.height == 16) {
|
|
size = getc(fp);
|
|
ftbl = (fontx_tbl *) calloc(size, sizeof(fontx_tbl));
|
|
readfontxtbl(ftbl, size, fp);
|
|
for (int i = 0; i < size; i++) {
|
|
for (code = ftbl[i].start; code <= ftbl[i].end; code++) {
|
|
scode = SJIS_to_SEQ(code);
|
|
if (scode != INVALIDACCESS16) {
|
|
for (line = 0; line < 16; line++) {
|
|
fread(&buf, sizeof(uint8_t), 1, fp);
|
|
jega->jfont_dbcs_16[(int) (scode * 32) + line] = buf;
|
|
fread(&buf, sizeof(uint8_t), 1, fp);
|
|
jega->jfont_dbcs_16[(int) (scode * 32) + line + 16] = buf;
|
|
}
|
|
} else {
|
|
fseek(fp, 32, SEEK_CUR);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
fclose(fp);
|
|
jega_log("JEGA: Width or height of DBCS font doesn't match.\n");
|
|
return 1;
|
|
}
|
|
} else {
|
|
if (fhead.width == 8 && fhead.height == 19) {
|
|
fread(jega->jfont_sbcs_19, sizeof(uint8_t), SBCS19_FILESIZE, fp);
|
|
} else {
|
|
fclose(fp);
|
|
jega_log("JEGA: Width or height of SBCS font doesn't match.\n");
|
|
return 1;
|
|
}
|
|
}
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
jega_commoninit(const device_t *info, void *priv, int vga)
|
|
{
|
|
jega_t *jega = (jega_t *) priv;
|
|
jega->is_vga = vga;
|
|
if (vga) {
|
|
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_vga);
|
|
svga_init(info, &jega->vga.svga, &jega->vga, 1 << 18, /*256kb*/
|
|
NULL,
|
|
jega_in, jega_out,
|
|
NULL,
|
|
NULL);
|
|
|
|
jega->vga.svga.bpp = 8;
|
|
jega->vga.svga.miscout = 1;
|
|
|
|
jega->vga.svga.vga_enabled = 0;
|
|
jega->vga.svga.priv_parent = jega;
|
|
jega->pallook = jega->vga.svga.pallook;
|
|
io_sethandler(0x03c0, 0x0020, jega_in, NULL, NULL, jega_out, NULL, NULL, jega);
|
|
} else {
|
|
for (int c = 0; c < 256; c++) {
|
|
pallook64[c] = makecol32(((c >> 2) & 1) * 0xaa, ((c >> 1) & 1) * 0xaa, (c & 1) * 0xaa);
|
|
pallook64[c] += makecol32(((c >> 5) & 1) * 0x55, ((c >> 4) & 1) * 0x55, ((c >> 3) & 1) * 0x55);
|
|
}
|
|
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_ega);
|
|
jega->pallook = pallook64;
|
|
ega_init(&jega->ega, 9, 0);
|
|
ega_set_type(&jega->ega, EGA_SUPEREGA);
|
|
jega->ega.priv_parent = jega;
|
|
mem_mapping_add(&jega->ega.mapping, 0xa0000, 0x20000,
|
|
ega_read, NULL, NULL, ega_write, NULL, NULL,
|
|
NULL, MEM_MAPPING_EXTERNAL, &jega->ega);
|
|
/* I/O 3DD and 3DE are used by Oki if386 */
|
|
io_sethandler(0x03c0, 0x001c, jega_in, NULL, NULL, jega_out, NULL, NULL, jega);
|
|
}
|
|
/* I/O 3DD and 3DE are used by Oki if386 */
|
|
// io_sethandler(0x03b0, 0x002c, jega_in, NULL, NULL, jega_out, NULL, NULL, jega);
|
|
jega->regs[RMOD1] = 0x48;
|
|
}
|
|
|
|
static void *
|
|
jega_standalone_init(const device_t *info)
|
|
{
|
|
jega_t *jega = calloc(1, sizeof(jega_t));
|
|
|
|
rom_init(&jega->bios_rom, JEGA_PATH_BIOS, 0xc0000, 0x8000, 0x7fff, 0, 0);
|
|
memset(&jega->jfont_dbcs_16, 0, DBCS16_FILESIZE);
|
|
LoadFontxFile(JEGA_PATH_FONTDBCS, jega);
|
|
|
|
jega_commoninit(info, jega, 0);
|
|
|
|
return jega;
|
|
}
|
|
|
|
static void *
|
|
jvga_standalone_init(const device_t *info)
|
|
{
|
|
jega_t *jega = calloc(1, sizeof(jega_t));
|
|
|
|
rom_init(&jega->bios_rom, JVGA_PATH_BIOS, 0xc0000, 0x8000, 0x7fff, 0, 0);
|
|
memset(&jega->jfont_dbcs_16, 0, DBCS16_FILESIZE);
|
|
LoadFontxFile(JVGA_PATH_FONTDBCS, jega);
|
|
|
|
jega_commoninit(info, jega, 1);
|
|
|
|
return jega;
|
|
}
|
|
|
|
static void
|
|
jega_close(void *priv)
|
|
{
|
|
jega_t *jega = (jega_t *) priv;
|
|
#ifdef ENABLE_JEGA_LOG
|
|
FILE *f;
|
|
// f = fopen("jega_font16.dmp", "wb");
|
|
// if (f != NULL) {
|
|
// fwrite(jega->jfont_dbcs_16, DBCS16_FILESIZE, 1, f);
|
|
// fclose(f);
|
|
// }
|
|
// f = fopen("jega_font19.dmp", "wb");
|
|
// if (f != NULL) {
|
|
// fwrite(jega->jfont_sbcs_19, SBCS19_FILESIZE, 1, f);
|
|
// fclose(f);
|
|
// }
|
|
f = fopen("jega_regs.txt", "wb");
|
|
if (f != NULL) {
|
|
for (int i = 0; i < 49; i++)
|
|
fprintf(f, "Regs %02X: %4X\n", i, jega->regs[i]);
|
|
for (int i = 0; i < 32; i++)
|
|
fprintf(f, "Attr %02X: %4X\n", i, jega->attrregs[i]);
|
|
for (int i = 0; i < 16; i++)
|
|
fprintf(f, "JEGAPal %02X: %4X\n", i, jega->egapal[i]);
|
|
for (int i = 0; i < 16; i++)
|
|
fprintf(f, "EGAPal %02X: %4X\n", i, jega->ega.egapal[i]);
|
|
for (int i = 0; i < 64; i++)
|
|
fprintf(f, "RealPal %02X: %4X\n", i, jega->pallook[i]);
|
|
fclose(f);
|
|
}
|
|
// f = fopen("ega_vram.dmp", "wb");
|
|
// if (f != NULL) {
|
|
// fwrite(jega->ega.vram, 256 * 1024, 1, f);
|
|
// fclose(f);
|
|
// }
|
|
f = fopen("ram_bda.dmp", "wb");
|
|
if (f != NULL) {
|
|
fwrite(&ram[0x0], 0x500, 1, f);
|
|
fclose(f);
|
|
}
|
|
pclog("jeclosed %04X:%04X DS %04X\n", cs >> 4, cpu_state.pc, DS);
|
|
#endif
|
|
|
|
if (jega->is_vga)
|
|
svga_close(&jega->vga.svga);
|
|
else {
|
|
if (jega->ega.eeprom)
|
|
free(jega->ega.eeprom);
|
|
free(jega->ega.vram);
|
|
}
|
|
|
|
free(jega);
|
|
}
|
|
|
|
static void
|
|
jega_recalctimings(void *priv)
|
|
{
|
|
jega_t *jega = (jega_t *) priv;
|
|
|
|
if (jega->is_vga)
|
|
svga_recalctimings(&jega->vga.svga);
|
|
else
|
|
ega_recalctimings(&jega->ega);
|
|
}
|
|
|
|
static void
|
|
jega_speed_changed(void *priv)
|
|
{
|
|
jega_t *jega = (jega_t *) priv;
|
|
|
|
jega_recalctimings(jega);
|
|
}
|
|
|
|
static int
|
|
jega_standalone_available(void)
|
|
{
|
|
return (rom_present(JEGA_PATH_BIOS) && rom_present(JEGA_PATH_FONTDBCS));
|
|
}
|
|
|
|
const device_t jega_device = {
|
|
.name = "JEGA",
|
|
.internal_name = "jega",
|
|
.flags = DEVICE_ISA,
|
|
.local = 0,
|
|
.init = jega_standalone_init,
|
|
.close = jega_close,
|
|
.reset = NULL,
|
|
.available = jega_standalone_available,
|
|
.speed_changed = jega_speed_changed,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
const device_t jvga_device = {
|
|
.name = "OKIVGA/H-2 (JVGA/H)",
|
|
.internal_name = "jvga",
|
|
.flags = DEVICE_ISA,
|
|
.local = 0,
|
|
.init = jvga_standalone_init,
|
|
.close = jega_close,
|
|
.reset = NULL,
|
|
.available = jega_standalone_available,
|
|
.speed_changed = jega_speed_changed,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
static uint8_t p65idx = 0;
|
|
// static uint8_t p3de_idx = 0;
|
|
static uint8_t p65[6];
|
|
// static uint8_t p3de[0x30];
|
|
|
|
|
|
static uint8_t
|
|
if386_p6x_read(uint16_t port, void *priv)
|
|
{
|
|
uint8_t ret = INVALIDACCESS8;
|
|
if (port == 0x63) {
|
|
ret = p65idx;
|
|
} else if (port == 0x65) {
|
|
ret = p65[p65idx];
|
|
}
|
|
// pclog("p%x_r: [%04x:%04x] [%02x]%02x\n", port, cs >> 4, cpu_state.pc , p65idx, ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
OKi if386AX/SX Power management and Miscellaneous
|
|
I/O 63h: Index 0-5, I/O 65h: Data
|
|
Index 2:
|
|
Bit 3: Caps Lock enabled
|
|
Bit 2: Num Lock enabled
|
|
Bit 1: Scrl Lock enabled
|
|
Bit 0: Kana Lock enabled
|
|
Index 3
|
|
Bit 2: External monitor output enabled
|
|
Bit 1: Floppy drive 1 active
|
|
Bit 0: Floppy drive 0 active
|
|
Index 5
|
|
Bit 8: ? (1=Disabled, 0=Enabled)
|
|
Bit 7: Screen Off? (enabled by Ctrl + Alt + [1] and disabled by any key)
|
|
Bit 4: Shutdown? (caused by POST rebooting and POWER OFF command in DOS 3.21)
|
|
Bit 3: ?
|
|
*/
|
|
static uint32_t lcd_cols[8] = { 0x001024, 0x747d8a, 0x8c96a4, 0xa0abbb,
|
|
0xb1bece, 0xc0cee0, 0xceddf0, 0xdbebff };
|
|
static void
|
|
if386_p6x_write(uint16_t port, uint8_t val, void *priv)
|
|
{
|
|
jega_t *jega = (jega_t *) priv;
|
|
// pclog("p%x_w: [%04x:%04x] val=%02x\n", port, cs >> 4, cpu_state.pc, val);
|
|
if (port == 0x63 && val < 6)
|
|
p65idx = val;
|
|
if (port == 0x65) {
|
|
// pclog("p65_w: [%04x:%04x] idx=%02x, val=%02x\n", cs >> 4, cpu_state.pc, p65idx, val);
|
|
p65[p65idx] = val;
|
|
if (p65idx == 0x03) {
|
|
if (val & 0x04) { /* Color monitor */
|
|
for (int c = 0; c < 256; c++) {
|
|
pallook64[c] = makecol32(((c >> 2) & 1) * 0xaa, ((c >> 1) & 1) * 0xaa, (c & 1) * 0xaa);
|
|
pallook64[c] += makecol32(((c >> 5) & 1) * 0x55, ((c >> 4) & 1) * 0x55, ((c >> 3) & 1) * 0x55);
|
|
pallook16[c] = makecol32(((c >> 2) & 1) * 0xaa, ((c >> 1) & 1) * 0xaa, (c & 1) * 0xaa);
|
|
pallook16[c] += makecol32(((c >> 4) & 1) * 0x55, ((c >> 4) & 1) * 0x55, ((c >> 4) & 1) * 0x55);
|
|
if ((c & 0x17) == 6)
|
|
pallook16[c] = makecol32(0xaa, 0x55, 0);
|
|
}
|
|
} else { /* Monochrome LCD */
|
|
for (int c = 0; c < 256; c++) {
|
|
int cval = 0;
|
|
#ifdef SIMPLE_BW
|
|
if (c & 0x0f)
|
|
cval = ((c & 0x0e) * 0x10) + 0x1f;
|
|
pallook64[c] = makecol32(cval, cval, cval);
|
|
pallook16[c] = makecol32(cval, cval, cval);
|
|
#else
|
|
if (c & 0x3f) {
|
|
cval = (c & 0x10) >> 2;
|
|
cval |= (c & 0x06) >> 1;
|
|
}
|
|
pallook64[c] = lcd_cols[cval];
|
|
cval = 0;
|
|
if (c & 0x0f)
|
|
cval = (c & 0x0e) >> 1;
|
|
pallook16[c] = lcd_cols[cval];
|
|
#endif
|
|
}
|
|
}
|
|
jega_recalctimings(jega);
|
|
} else if (p65idx == 0x05) {
|
|
if (val & 0x10) {
|
|
/* Power off (instead this call hardware reset here) */
|
|
device_reset_all(DEVICE_ALL);
|
|
resetx86();
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
static void *
|
|
if386jega_init(const device_t *info)
|
|
{
|
|
jega_t *jega = calloc(1, sizeof(jega_t));
|
|
|
|
rom_init(&jega->bios_rom, IF386_PATH_VBIOS, 0xc0000, 0x8000, 0x7fff, 0, 0);
|
|
memset(&jega->jfont_dbcs_16, 0, DBCS16_FILESIZE);
|
|
LoadFontxFile(JEGA_PATH_FONTDBCS, jega);
|
|
|
|
jega_commoninit(info, jega, 0);
|
|
|
|
io_sethandler(0x0063, 1, if386_p6x_read, NULL, NULL, if386_p6x_write, NULL, NULL, jega);
|
|
io_sethandler(0x0065, 1, if386_p6x_read, NULL, NULL, if386_p6x_write, NULL, NULL, jega);
|
|
// io_sethandler(0x03dd, 2, if386_p6x_read, NULL, NULL, if386_p6x_write, NULL, NULL, jega);
|
|
|
|
return jega;
|
|
}
|
|
|
|
static int
|
|
if386jega_available(void)
|
|
{
|
|
return (rom_present(IF386_PATH_VBIOS) && rom_present(JEGA_PATH_FONTDBCS));
|
|
}
|
|
|
|
const device_t if386jega_device = {
|
|
.name = "JEGA (if386AX)",
|
|
.internal_name = "if386jega",
|
|
.flags = DEVICE_ISA,
|
|
.local = 0,
|
|
.init = if386jega_init,
|
|
.close = jega_close,
|
|
.reset = NULL,
|
|
.available = if386jega_available,
|
|
.speed_changed = jega_speed_changed,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|