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dosbox-wii/src/hardware/vga_other.cpp

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/*
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* Copyright (C) 2002-2010 The DOSBox Team
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*
* 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.
*/
/* $Id: vga_other.cpp,v 1.28 2009-07-11 10:25:24 c2woody Exp $ */
#include <string.h>
#include <math.h>
#include "dosbox.h"
#include "inout.h"
#include "vga.h"
#include "mem.h"
#include "pic.h"
#include "render.h"
#include "mapper.h"
static void write_crtc_index_other(Bitu /*port*/,Bitu val,Bitu /*iolen*/) {
vga.other.index=(Bit8u)val;
}
static Bitu read_crtc_index_other(Bitu /*port*/,Bitu /*iolen*/) {
return vga.other.index;
}
static void write_crtc_data_other(Bitu /*port*/,Bitu val,Bitu /*iolen*/) {
switch (vga.other.index) {
case 0x00: //Horizontal total
if (vga.other.htotal ^ val) VGA_StartResize();
vga.other.htotal=(Bit8u)val;
break;
case 0x01: //Horizontal displayed chars
if (vga.other.hdend ^ val) VGA_StartResize();
vga.other.hdend=(Bit8u)val;
break;
case 0x02: //Horizontal sync position
vga.other.hsyncp=(Bit8u)val;
break;
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case 0x03: //Horizontal sync width
if (machine==MCH_TANDY) vga.other.vsyncw=(Bit8u)(val >> 4);
else vga.other.vsyncw = 16; // The MC6845 has a fixed v-sync width of 16 lines
vga.other.hsyncw=(Bit8u)(val & 0xf);
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break;
case 0x04: //Vertical total
if (vga.other.vtotal ^ val) VGA_StartResize();
vga.other.vtotal=(Bit8u)val;
break;
case 0x05: //Vertical display adjust
if (vga.other.vadjust ^ val) VGA_StartResize();
vga.other.vadjust=(Bit8u)val;
break;
case 0x06: //Vertical rows
if (vga.other.vdend ^ val) VGA_StartResize();
vga.other.vdend=(Bit8u)val;
break;
case 0x07: //Vertical sync position
vga.other.vsyncp=(Bit8u)val;
break;
case 0x09: //Max scanline
val &= 0x1f; // VGADOC says bit 0-3 but the MC6845 datasheet says bit 0-4
if (vga.other.max_scanline ^ val) VGA_StartResize();
vga.other.max_scanline=(Bit8u)val;
break;
case 0x0A: /* Cursor Start Register */
vga.other.cursor_start = (Bit8u)(val & 0x3f);
vga.draw.cursor.sline = (Bit8u)(val&0x1f);
vga.draw.cursor.enabled = ((val & 0x60) != 0x20);
break;
case 0x0B: /* Cursor End Register */
vga.other.cursor_end = (Bit8u)(val&0x1f);
vga.draw.cursor.eline = (Bit8u)(val&0x1f);
break;
case 0x0C: /* Start Address High Register */
vga.config.display_start=(vga.config.display_start & 0x00FF) | (val << 8);
break;
case 0x0D: /* Start Address Low Register */
vga.config.display_start=(vga.config.display_start & 0xFF00) | val;
break;
case 0x0E: /*Cursor Location High Register */
vga.config.cursor_start&=0x00ff;
vga.config.cursor_start|=((Bit8u)val) << 8;
break;
case 0x0F: /* Cursor Location Low Register */
vga.config.cursor_start&=0xff00;
vga.config.cursor_start|=(Bit8u)val;
break;
case 0x10: /* Light Pen High */
vga.other.lightpen &= 0xff;
vga.other.lightpen |= (val & 0x3f)<<8; // only 6 bits
break;
case 0x11: /* Light Pen Low */
vga.other.lightpen &= 0xff00;
vga.other.lightpen |= (Bit8u)val;
break;
default:
LOG(LOG_VGAMISC,LOG_NORMAL)("MC6845:Write %X to illegal index %x",val,vga.other.index);
}
}
static Bitu read_crtc_data_other(Bitu /*port*/,Bitu /*iolen*/) {
switch (vga.other.index) {
case 0x00: //Horizontal total
return vga.other.htotal;
case 0x01: //Horizontal displayed chars
return vga.other.hdend;
case 0x02: //Horizontal sync position
return vga.other.hsyncp;
case 0x03: //Horizontal and vertical sync width
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if (machine==MCH_TANDY)
return vga.other.hsyncw | (vga.other.vsyncw << 4);
else return vga.other.hsyncw;
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case 0x04: //Vertical total
return vga.other.vtotal;
case 0x05: //Vertical display adjust
return vga.other.vadjust;
case 0x06: //Vertical rows
return vga.other.vdend;
case 0x07: //Vertical sync position
return vga.other.vsyncp;
case 0x09: //Max scanline
return vga.other.max_scanline;
case 0x0A: /* Cursor Start Register */
return vga.other.cursor_start;
case 0x0B: /* Cursor End Register */
return vga.other.cursor_end;
case 0x0C: /* Start Address High Register */
return (Bit8u)(vga.config.display_start >> 8);
case 0x0D: /* Start Address Low Register */
return (Bit8u)(vga.config.display_start & 0xff);
case 0x0E: /*Cursor Location High Register */
return (Bit8u)(vga.config.cursor_start >> 8);
case 0x0F: /* Cursor Location Low Register */
return (Bit8u)(vga.config.cursor_start & 0xff);
case 0x10: /* Light Pen High */
return (Bit8u)(vga.other.lightpen >> 8);
case 0x11: /* Light Pen Low */
return (Bit8u)(vga.other.lightpen & 0xff);
default:
LOG(LOG_VGAMISC,LOG_NORMAL)("MC6845:Read from illegal index %x",vga.other.index);
}
return (Bitu)(~0);
}
static double hue_offset = 0.0;
static Bit8u cga16_val = 0;
static void update_cga16_color(void);
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static Bit8u herc_pal = 0;
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static void cga16_color_select(Bit8u val) {
cga16_val = val;
update_cga16_color();
}
static void update_cga16_color(void) {
// Algorithm provided by NewRisingSun
// His/Her algorithm is more complex and gives better results than the one below
// However that algorithm doesn't fit in our vga pallette.
// Therefore a simple variant is used, but the colours are bit lighter.
// It uses an avarage over the bits to give smooth transitions from colour to colour
// This is represented by the j variable. The i variable gives the 16 colours
// The draw handler calculates the needed avarage and combines this with the colour
// to match an entry that is generated here.
int baseR=0, baseG=0, baseB=0;
double sinhue,coshue,hue,basehue = 50.0;
double I,Q,Y,pixelI,pixelQ,R,G,B;
Bitu colorBit1,colorBit2,colorBit3,colorBit4,index;
if (cga16_val & 0x01) baseB += 0xa8;
if (cga16_val & 0x02) baseG += 0xa8;
if (cga16_val & 0x04) baseR += 0xa8;
if (cga16_val & 0x08) { baseR += 0x57; baseG += 0x57; baseB += 0x57; }
if (cga16_val & 0x20) basehue = 35.0;
hue = (basehue + hue_offset)*0.017453239;
sinhue = sin(hue);
coshue = cos(hue);
for(Bitu i = 0; i < 16;i++) {
for(Bitu j = 0;j < 5;j++) {
index = 0x80|(j << 4)|i; //use upperpart of vga pallette
colorBit4 = (i&1)>>0;
colorBit3 = (i&2)>>1;
colorBit2 = (i&4)>>2;
colorBit1 = (i&8)>>3;
//calculate lookup table
I = 0; Q = 0;
I += (double) colorBit1;
Q += (double) colorBit2;
I -= (double) colorBit3;
Q -= (double) colorBit4;
Y = (double) j / 4.0; //calculated avarage is over 4 bits
pixelI = I * 1.0 / 3.0; //I* tvSaturnation / 3.0
pixelQ = Q * 1.0 / 3.0; //Q* tvSaturnation / 3.0
I = pixelI*coshue + pixelQ*sinhue;
Q = pixelQ*coshue - pixelI*sinhue;
R = Y + 0.956*I + 0.621*Q; if (R < 0.0) R = 0.0; if (R > 1.0) R = 1.0;
G = Y - 0.272*I - 0.647*Q; if (G < 0.0) G = 0.0; if (G > 1.0) G = 1.0;
B = Y - 1.105*I + 1.702*Q; if (B < 0.0) B = 0.0; if (B > 1.0) B = 1.0;
RENDER_SetPal((Bit8u)index,static_cast<Bit8u>(R*baseR),static_cast<Bit8u>(G*baseG),static_cast<Bit8u>(B*baseB));
}
}
}
static void IncreaseHue(bool pressed) {
if (!pressed)
return;
hue_offset += 5.0;
update_cga16_color();
LOG_MSG("Hue at %f",hue_offset);
}
static void DecreaseHue(bool pressed) {
if (!pressed)
return;
hue_offset -= 5.0;
update_cga16_color();
LOG_MSG("Hue at %f",hue_offset);
}
static void write_color_select(Bit8u val) {
vga.tandy.color_select=val;
switch (vga.mode) {
case M_TANDY2:
VGA_SetCGA2Table(0,val & 0xf);
break;
case M_TANDY4:
{
if ((machine==MCH_TANDY && (vga.tandy.gfx_control & 0x8)) ||
(machine==MCH_PCJR && (vga.tandy.mode_control==0x0b))) {
VGA_SetCGA4Table(0,1,2,3);
return;
}
Bit8u base=(val & 0x10) ? 0x08 : 0;
/* Check for BW Mode */
if (vga.tandy.mode_control & 0x4) {
VGA_SetCGA4Table(val & 0xf,3+base,4+base,7+base);
} else {
if (val & 0x20) VGA_SetCGA4Table(val & 0xf,3+base,5+base,7+base);
else VGA_SetCGA4Table(val & 0xf,2+base,4+base,6+base);
}
}
break;
case M_CGA16:
cga16_color_select(val);
break;
case M_TEXT:
case M_TANDY16:
break;
}
}
static void TANDY_FindMode(void) {
if (vga.tandy.mode_control & 0x2) {
if (vga.tandy.gfx_control & 0x10)
VGA_SetMode(M_TANDY16);
else if (vga.tandy.gfx_control & 0x08)
VGA_SetMode(M_TANDY4);
else if (vga.tandy.mode_control & 0x10)
VGA_SetMode(M_TANDY2);
else
VGA_SetMode(M_TANDY4);
write_color_select(vga.tandy.color_select);
} else {
VGA_SetMode(M_TANDY_TEXT);
}
}
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void VGA_SetModeNow(VGAModes mode);
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static void PCJr_FindMode(void) {
if (vga.tandy.mode_control & 0x2) {
if (vga.tandy.mode_control & 0x10) {
/* bit4 of mode control 1 signals 16 colour graphics mode */
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if (vga.mode==M_TANDY4) VGA_SetModeNow(M_TANDY16); // TODO lowres mode only
else VGA_SetMode(M_TANDY16);
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} else if (vga.tandy.gfx_control & 0x08) {
/* bit3 of mode control 2 signals 2 colour graphics mode */
VGA_SetMode(M_TANDY2);
} else {
/* otherwise some 4-colour graphics mode */
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if (vga.mode==M_TANDY16) VGA_SetModeNow(M_TANDY4);
else VGA_SetMode(M_TANDY4);
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}
write_color_select(vga.tandy.color_select);
} else {
VGA_SetMode(M_TANDY_TEXT);
}
}
static void TandyCheckLineMask(void ) {
if ( vga.tandy.extended_ram & 1 ) {
vga.tandy.line_mask = 0;
} else if ( vga.tandy.mode_control & 0x2) {
vga.tandy.line_mask |= 1;
}
if ( vga.tandy.line_mask ) {
vga.tandy.line_shift = 13;
vga.tandy.addr_mask = (1 << 13) - 1;
} else {
vga.tandy.addr_mask = (Bitu)(~0);
vga.tandy.line_shift = 0;
}
}
static void write_tandy_reg(Bit8u val) {
switch (vga.tandy.reg_index) {
case 0x0:
if (machine==MCH_PCJR) {
vga.tandy.mode_control=val;
VGA_SetBlinking(val & 0x20);
PCJr_FindMode();
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vga.attr.disabled = (val&0x8)? 0: 1;
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} else {
LOG(LOG_VGAMISC,LOG_NORMAL)("Unhandled Write %2X to tandy reg %X",val,vga.tandy.reg_index);
}
break;
case 0x2: /* Border color */
vga.tandy.border_color=val;
break;
case 0x3: /* More control */
vga.tandy.gfx_control=val;
if (machine==MCH_TANDY) TANDY_FindMode();
else PCJr_FindMode();
break;
case 0x5: /* Extended ram page register */
// Bit 0 enables extended ram
// Bit 7 Switches clock, 0 -> cga 28.6 , 1 -> mono 32.5
vga.tandy.extended_ram = val;
//This is a bit of a hack to enable mapping video memory differently for highres mode
TandyCheckLineMask();
VGA_SetupHandlers();
break;
case 0x8: /* Monitor mode seletion */
//Bit 1 select mode e, for 640x200x16, some double clocking thing?
//Bit 4 select 350 line mode for hercules emulation
LOG(LOG_VGAMISC,LOG_NORMAL)("Write %2X to tandy monitor mode",val );
break;
/* palette colors */
case 0x10: case 0x11: case 0x12: case 0x13:
case 0x14: case 0x15: case 0x16: case 0x17:
case 0x18: case 0x19: case 0x1a: case 0x1b:
case 0x1c: case 0x1d: case 0x1e: case 0x1f:
VGA_ATTR_SetPalette(vga.tandy.reg_index-0x10,val & 0xf);
break;
default:
LOG(LOG_VGAMISC,LOG_NORMAL)("Unhandled Write %2X to tandy reg %X",val,vga.tandy.reg_index);
}
}
static void write_cga(Bitu port,Bitu val,Bitu /*iolen*/) {
switch (port) {
case 0x3d8:
vga.tandy.mode_control=(Bit8u)val;
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vga.attr.disabled = (val&0x8)? 0: 1;
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if (vga.tandy.mode_control & 0x2) {
if (vga.tandy.mode_control & 0x10) {
if (!(val & 0x4) && machine==MCH_CGA) {
VGA_SetMode(M_CGA16); //Video burst 16 160x200 color mode
} else {
VGA_SetMode(M_TANDY2);
}
} else VGA_SetMode(M_TANDY4);
write_color_select(vga.tandy.color_select);
} else {
VGA_SetMode(M_TANDY_TEXT);
}
VGA_SetBlinking(val & 0x20);
break;
case 0x3d9:
write_color_select((Bit8u)val);
break;
}
}
static void write_tandy(Bitu port,Bitu val,Bitu /*iolen*/) {
switch (port) {
case 0x3d8:
vga.tandy.mode_control=(Bit8u)val;
TandyCheckLineMask();
VGA_SetBlinking(val & 0x20);
TANDY_FindMode();
break;
case 0x3d9:
write_color_select((Bit8u)val);
break;
case 0x3da:
vga.tandy.reg_index=(Bit8u)val;
break;
case 0x3db: // Clear lightpen latch
vga.other.lightpen_triggered = false;
break;
case 0x3dc: // Preset lightpen latch
if (!vga.other.lightpen_triggered) {
vga.other.lightpen_triggered = true; // TODO: this shows at port 3ba/3da bit 1
double timeInFrame = PIC_FullIndex()-vga.draw.delay.framestart;
double timeInLine = fmod(timeInFrame,vga.draw.delay.htotal);
Bitu current_scanline = (Bitu)(timeInFrame / vga.draw.delay.htotal);
vga.other.lightpen = (Bit16u)((vga.draw.address_add/2) * (current_scanline/2));
vga.other.lightpen += (Bit16u)((timeInLine / vga.draw.delay.hdend) *
((float)(vga.draw.address_add/2)));
}
break;
// case 0x3dd: //Extended ram page address register:
break;
case 0x3de:
write_tandy_reg((Bit8u)val);
break;
case 0x3df:
vga.tandy.line_mask = (Bit8u)(val >> 6);
vga.tandy.draw_bank = val & ((vga.tandy.line_mask&2) ? 0x6 : 0x7);
vga.tandy.mem_bank = (val >> 3) & ((vga.tandy.line_mask&2) ? 0x6 : 0x7);
TandyCheckLineMask();
VGA_SetupHandlers();
break;
}
}
static void write_pcjr(Bitu port,Bitu val,Bitu /*iolen*/) {
switch (port) {
case 0x3d9:
write_color_select((Bit8u)val);
break;
case 0x3da:
if (vga.tandy.pcjr_flipflop) write_tandy_reg((Bit8u)val);
else vga.tandy.reg_index=(Bit8u)val;
vga.tandy.pcjr_flipflop=!vga.tandy.pcjr_flipflop;
break;
case 0x3df:
vga.tandy.line_mask = (Bit8u)(val >> 6);
vga.tandy.draw_bank = val & ((vga.tandy.line_mask&2) ? 0x6 : 0x7);
vga.tandy.mem_bank = (val >> 3) & ((vga.tandy.line_mask&2) ? 0x6 : 0x7);
vga.tandy.draw_base = &MemBase[vga.tandy.draw_bank * 16 * 1024];
vga.tandy.mem_base = &MemBase[vga.tandy.mem_bank * 16 * 1024];
TandyCheckLineMask();
VGA_SetupHandlers();
break;
}
}
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static void CycleHercPal(bool pressed) {
if (!pressed) return;
if (++herc_pal>2) herc_pal=0;
Herc_Palette();
VGA_DAC_CombineColor(1,7);
}
void Herc_Palette(void) {
switch (herc_pal) {
case 0: // White
VGA_DAC_SetEntry(0x7,0x2a,0x2a,0x2a);
VGA_DAC_SetEntry(0xf,0x3f,0x3f,0x3f);
break;
case 1: // Amber
VGA_DAC_SetEntry(0x7,0x34,0x20,0x00);
VGA_DAC_SetEntry(0xf,0x3f,0x34,0x00);
break;
case 2: // Green
VGA_DAC_SetEntry(0x7,0x00,0x26,0x00);
VGA_DAC_SetEntry(0xf,0x00,0x3f,0x00);
break;
}
}
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static void write_hercules(Bitu port,Bitu val,Bitu /*iolen*/) {
switch (port) {
case 0x3b8: {
// the protected bits can always be cleared but only be set if the
// protection bits are set
if (vga.herc.mode_control&0x2) {
// already set
if (!(val&0x2)) {
vga.herc.mode_control &= ~0x2;
VGA_SetMode(M_HERC_TEXT);
}
} else {
// not set, can only set if protection bit is set
if ((val & 0x2) && (vga.herc.enable_bits & 0x1)) {
vga.herc.mode_control |= 0x2;
VGA_SetMode(M_HERC_GFX);
}
}
if (vga.herc.mode_control&0x80) {
if (!(val&0x80)) {
vga.herc.mode_control &= ~0x80;
vga.tandy.draw_base = &vga.mem.linear[0];
}
} else {
if ((val & 0x80) && (vga.herc.enable_bits & 0x2)) {
vga.herc.mode_control |= 0x80;
vga.tandy.draw_base = &vga.mem.linear[32*1024];
}
}
vga.draw.blinking = (val&0x20)!=0;
vga.herc.mode_control &= 0x82;
vga.herc.mode_control |= val & ~0x82;
break;
}
case 0x3bf:
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if ( vga.herc.enable_bits ^ val) {
vga.herc.enable_bits=val;
// Bit 1 enables the upper 32k of video memory,
// so update the handlers
VGA_SetupHandlers();
}
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break;
}
}
/* static Bitu read_hercules(Bitu port,Bitu iolen) {
LOG_MSG("read from Herc port %x",port);
return 0;
} */
Bitu read_herc_status(Bitu /*port*/,Bitu /*iolen*/) {
// 3BAh (R): Status Register
// bit 0 Horizontal sync
// 1 Light pen status (only some cards)
// 3 Video signal
// 4-6 000: Hercules
// 001: Hercules Plus
// 101: Hercules InColor
// 111: Unknown clone
// 7 Vertical sync inverted
double timeInFrame = PIC_FullIndex()-vga.draw.delay.framestart;
Bit8u retval=0x72; // Hercules ident; from a working card (Winbond W86855AF)
// Another known working card has 0x76 ("KeysoGood", full-length)
if (timeInFrame < vga.draw.delay.vrstart ||
timeInFrame > vga.draw.delay.vrend) retval |= 0x80;
double timeInLine=fmod(timeInFrame,vga.draw.delay.htotal);
if (timeInLine >= vga.draw.delay.hrstart &&
timeInLine <= vga.draw.delay.hrend) retval |= 0x1;
// 688 Attack sub checks bit 3 - as a workaround have the bit enabled
// if no sync active (corresponds to a completely white screen)
if ((retval&0x81)==0x80) retval |= 0x8;
return retval;
}
void VGA_SetupOther(void) {
Bitu i;
memset( &vga.tandy, 0, sizeof( vga.tandy ));
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vga.attr.disabled = 0;
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vga.config.bytes_skip=0;
//Initialize values common for most machines, can be overwritten
vga.tandy.draw_base = vga.mem.linear;
vga.tandy.mem_base = vga.mem.linear;
vga.tandy.addr_mask = 8*1024 - 1;
vga.tandy.line_mask = 3;
vga.tandy.line_shift = 13;
if (machine==MCH_CGA || IS_TANDY_ARCH) {
extern Bit8u int10_font_08[256 * 8];
for (i=0;i<256;i++) memcpy(&vga.draw.font[i*32],&int10_font_08[i*8],8);
vga.draw.font_tables[0]=vga.draw.font_tables[1]=vga.draw.font;
}
if (machine==MCH_HERC) {
extern Bit8u int10_font_14[256 * 14];
for (i=0;i<256;i++) memcpy(&vga.draw.font[i*32],&int10_font_14[i*14],14);
vga.draw.font_tables[0]=vga.draw.font_tables[1]=vga.draw.font;
sync to dosbox svn, improve osk
2010-06-24 20:33:09 +02:00
MAPPER_AddHandler(CycleHercPal,MK_f11,0,"hercpal","Herc Pal");
sync
2009-11-10 10:06:59 +01:00
}
if (machine==MCH_CGA) {
IO_RegisterWriteHandler(0x3d8,write_cga,IO_MB);
IO_RegisterWriteHandler(0x3d9,write_cga,IO_MB);
IO_RegisterWriteHandler(0x3db,write_tandy,IO_MB);
IO_RegisterWriteHandler(0x3dc,write_tandy,IO_MB);
MAPPER_AddHandler(IncreaseHue,MK_f11,MMOD2,"inchue","Inc Hue");
MAPPER_AddHandler(DecreaseHue,MK_f11,0,"dechue","Dec Hue");
}
if (machine==MCH_TANDY) {
write_tandy( 0x3df, 0x0, 0 );
IO_RegisterWriteHandler(0x3d8,write_tandy,IO_MB);
IO_RegisterWriteHandler(0x3d9,write_tandy,IO_MB);
IO_RegisterWriteHandler(0x3de,write_tandy,IO_MB);
IO_RegisterWriteHandler(0x3df,write_tandy,IO_MB);
IO_RegisterWriteHandler(0x3da,write_tandy,IO_MB);
}
if (machine==MCH_PCJR) {
//write_pcjr will setup base address
write_pcjr( 0x3df, 0x7 | (0x7 << 3), 0 );
IO_RegisterWriteHandler(0x3d9,write_pcjr,IO_MB);
IO_RegisterWriteHandler(0x3da,write_pcjr,IO_MB);
IO_RegisterWriteHandler(0x3df,write_pcjr,IO_MB);
}
if (machine==MCH_HERC) {
Bitu base=0x3b0;
for (Bitu i = 0; i < 4; i++) {
// The registers are repeated as the address is not decoded properly;
// The official ports are 3b4, 3b5
IO_RegisterWriteHandler(base+i*2,write_crtc_index_other,IO_MB);
IO_RegisterWriteHandler(base+i*2+1,write_crtc_data_other,IO_MB);
IO_RegisterReadHandler(base+i*2,read_crtc_index_other,IO_MB);
IO_RegisterReadHandler(base+i*2+1,read_crtc_data_other,IO_MB);
}
vga.herc.enable_bits=0;
vga.herc.mode_control=0xa; // first mode written will be text mode
vga.crtc.underline_location = 13;
IO_RegisterWriteHandler(0x3b8,write_hercules,IO_MB);
IO_RegisterWriteHandler(0x3bf,write_hercules,IO_MB);
IO_RegisterReadHandler(0x3ba,read_herc_status,IO_MB);
}
if (machine==MCH_CGA) {
Bitu base=0x3d0;
for (Bitu port_ct=0; port_ct<4; port_ct++) {
IO_RegisterWriteHandler(base+port_ct*2,write_crtc_index_other,IO_MB);
IO_RegisterWriteHandler(base+port_ct*2+1,write_crtc_data_other,IO_MB);
IO_RegisterReadHandler(base+port_ct*2,read_crtc_index_other,IO_MB);
IO_RegisterReadHandler(base+port_ct*2+1,read_crtc_data_other,IO_MB);
}
}
if (IS_TANDY_ARCH) {
Bitu base=0x3d4;
IO_RegisterWriteHandler(base,write_crtc_index_other,IO_MB);
IO_RegisterWriteHandler(base+1,write_crtc_data_other,IO_MB);
IO_RegisterReadHandler(base,read_crtc_index_other,IO_MB);
IO_RegisterReadHandler(base+1,read_crtc_data_other,IO_MB);
}
}
Reference in New Issue Copy Permalink