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gs.cpp
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gs.cpp
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/*
VGATEST
Use at your own risk.
Copyright (C) 2019 Marco Bortolin
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <conio.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <stdarg.h>
#include "common.h"
#include "utils.h"
#include "gs.h"
#define VGA_ADDR ((uint8_t *) 0xa0000)
#define CGA_ADDR ((uint8_t *) 0xb8000)
int32_t SIN_ACOS[1024];
GfxScreen::GfxScreen()
{
m_error = e_none;
m_origMode = getBIOSMode();
if(!isVga()) {
m_error = e_notVgaDisplay;
return;
}
m_fontAddr = NULL;
m_fontHeight = 14;
m_videoMem = VGA_ADDR;
m_activeOffset = 0;
m_maxx = 0;
m_maxy = 0;
m_width = 0;
m_height = 0;
m_scanlines = 0;
m_pages = 0;
m_lineSize = 0;
m_pageSize = 0;
m_chained = 0;
m_modeName = NULL;
m_colors = 0;
m_crtc_addr = 0;
m_isr1_addr = 0;
m_overscanColor = 0;
m_putPixelFn = NULL;
m_getPixelFn = NULL;
m_clearFn = NULL;
m_drawTextFn = NULL;
// precompute the sin(arccos(x)) table for circles
for(int i=0;i<1024;i++) {
SIN_ACOS[i] = sin(acos((float)i/1024))*0x10000L;
}
}
GfxScreen::~GfxScreen()
{
}
void GfxScreen::setMode(int16_t mode)
{
m_error = e_none;
m_modeName = NULL;
m_videoMem = VGA_ADDR;
switch (mode)
{
case v_b320x200_04h: mode_b320x200_04h(); break;
case v_b640x200_06h: mode_b640x200_06h(); break;
case v_b320x200_0Dh: mode_b320x200_0Dh(); break;
case v_b640x200_0Eh: mode_b640x200_0Eh(); break;
case v_b640x350_0Fh: mode_b640x350_0Fh(); break;
case v_b640x350_10h: mode_b640x350_10h(); break;
case v_b640x480_12h: mode_b640x480_12h(); break;
case v_b320x200_13h: mode_b320x200_13h(); break;
case v_t160x120: mode_t160x120(); break;
case v_t296x220: mode_t296x220(); break;
case v_t256x256_Q: mode_t256x256_Q(); break;
case v_t320x200_Y: mode_t320x200_Y(); break;
case v_t320x240_X: mode_t320x240_X(); break;
case v_t320x400: mode_t320x400(); break;
case v_t360x270: mode_t360x270(); break;
case v_t360x360: mode_t360x360(); break;
case v_t360x480: mode_t360x480(); break;
case v_t400x300: mode_t400x300(); break;
default:
m_error = e_modeNotSupported;
break;
}
if (m_error != e_none) {
return;
}
m_fontAddr = getFont(m_fontHeight);
m_activeOffset = m_videoMem;
if(inp(MOR_READ) & 1) {
m_crtc_addr = CRTC_ADDR_COL;
m_isr1_addr = ISR1_ADDR_COL;
} else {
m_crtc_addr = CRTC_ADDR_MONO;
m_isr1_addr = ISR1_ADDR_MONO;
}
m_maxx = m_width - 1;
m_maxy = m_height - 1;
if(m_crtc_addr == CRTC_ADDR_COL) {
ACR_OUT_COL(ACR_OVERSCAN, m_overscanColor);
}
clear(color(c_black));
}
void GfxScreen::resetMode()
{
setBIOSMode(m_origMode);
m_width = 0;
m_height = 0;
m_scanlines = 0;
m_maxx = 0;
m_maxy = 0;
m_pages = 0;
m_lineSize = 0;
m_pageSize = 0;
m_chained = 0;
m_modeName = NULL;
m_crtc_addr = 0;
m_isr1_addr = 0;
m_putPixelFn = NULL;
m_getPixelFn = NULL;
m_clearFn = NULL;
m_drawTextFn = NULL;
}
void GfxScreen::clear_odd_even(int row, int lines, uint32_t color)
{
/* address section differs depending on odd/even scanline */
uint8_t *even_ptr = m_activeOffset;
uint8_t *odd_ptr = m_activeOffset + 0x2000;
while(lines--) {
int y = row + lines;
int bank_line = y / 2;
uint8_t *base;
if(y & 1) {
base = odd_ptr;
} else {
base = even_ptr;
}
fillLong(base + (m_lineSize * bank_line), color, m_lineSize/4);
}
}
void GfxScreen::clear1(int row, int lines, uint8_t color)
{
uint32_t c = 0;
if(color & 1) {
c = 0xffffffff;
}
clear_odd_even(row, lines, c);
}
void GfxScreen::clear2(int row, int lines, uint8_t color)
{
color &= 3;
uint32_t c = color | (color << 2) | (color << 4) | (color << 6);
c = (c << 8) | c;
c = (c << 16) | c;
clear_odd_even(row, lines, c);
}
void GfxScreen::clear4(int row, int lines, uint8_t color)
{
setPlanarRWMode(0,0);
// enable all planes
SEQ_OUT(SEQ_MAPMASK, 0x0F);
// CPU data to all planes will be
// replaced by set/reset value
GCR_OUT(GCR_EN_SETRESET, 0x0F);
// set/reset value
GCR_OUT(GCR_SETRESET, color);
// enable all bits
GCR_OUT(GCR_BITMASK, 0xff);
// since set/reset is enabled for all planes, the written value is ignored
fillLong(m_activeOffset + (m_lineSize * row), 0, (m_lineSize*lines)/4);
// disable set/reset
GCR_OUT(GCR_EN_SETRESET, 0x00);
setPlanarRWMode(0,2);
}
void GfxScreen::clear8(int row, int lines, uint8_t color)
{
uint32_t c = color;
c = (c << 8) | color;
c = (c << 8) | color;
c = (c << 8) | color;
outp(SEQ_ADDR, 0x02); // enable all planes
outp(SEQ_DATA, 0x0F);
fillLong(m_activeOffset + (m_lineSize * row), c, (m_width*lines)/16);
}
void GfxScreen::clear8chained(int row, int lines, uint8_t color)
{
uint32_t c = color;
c = (c << 8) | color;
c = (c << 8) | color;
c = (c << 8) | color;
fillLong(m_activeOffset + (m_lineSize * row), c, (m_width*lines)/4);
}
void GfxScreen::clear(uint8_t color)
{
clear(0, m_height, color);
}
int32_t GfxScreen::getPageOffset(uint8_t page)
{
// only planar modes have more than 1 page
// so if current mode is chained (m_pageSize / 4) is wrong but irrelevant
return (page % m_pages) * (m_pageSize / 4);
}
void GfxScreen::setActivePage(uint8_t page)
{
m_activeOffset = m_videoMem + getPageOffset(page);
}
void GfxScreen::setVisiblePage(uint8_t page)
{
if(m_pages == 1) {
vsync();
return;
}
int32_t offset = getPageOffset(page);
// wait for display disable
while(inp(m_isr1_addr) & 0x01);
// set start address
setStartAddress(offset);
// wait for vertical retrace
while(!(inp(m_isr1_addr) & 0x08));
}
void GfxScreen::putPixel1(int16_t x, int16_t y, uint8_t color)
{
uint8_t *ptr = m_activeOffset + 0x2000*(y%2) + m_lineSize*(y/2) + (x/8);
int mask = (1<<7) >> (x%8);
uint8_t temp = *ptr;
color &= 1;
color <<= 7;
color >>= (x%8);
temp &= ~mask;
temp |= color;
*ptr = temp;
}
void GfxScreen::putPixel2(int16_t x, int16_t y, uint8_t color)
{
uint8_t *ptr = m_activeOffset + 0x2000*(y%2) + m_lineSize*(y/2) + (2*x/8);
int mask = (3<<6) >> (2*x%8);
uint8_t temp = *ptr;
color &= 3;
color <<= 6;
color >>= (2*x%8);
temp &= ~mask;
temp |= color;
*ptr = temp;
}
void GfxScreen::putPixel4(int16_t x, int16_t y, uint8_t color)
{
// clip to the mode width and height
if(x < 0 || x > m_maxx || y < 0 || y > m_maxy) {
return;
}
uint8_t bitmask = 1 << ((x & 0x07) ^ 0x07);
outp(GCR_ADDR, GCR_BITMASK);
outp(GCR_DATA, bitmask);
int offset = y*m_lineSize + x/8;
volatile uint8_t dummy = *(m_activeOffset + offset); // load latches
*(m_activeOffset + offset) = color % 16;
}
void GfxScreen::putPixel8(int16_t x, int16_t y, uint8_t color)
{
// clip to the mode width and height
if (x < 0 || x > m_maxx || y < 0 || y > m_maxy) {
return;
}
// set the mask so that only one pixel gets written
outp(SEQ_ADDR, SEQ_MAPMASK);
outp(SEQ_DATA, 1 << (x & 0x3));
// put pixel in memory
*(m_activeOffset + (m_lineSize * y) + (x >> 2)) = color;
}
void GfxScreen::putPixel8chained(int16_t x, int16_t y, uint8_t color)
{
// clip to the mode width and height
if (x < 0 || x > m_maxx || y < 0 || y > m_maxy) {
return;
}
// put pixel in memory
*(m_activeOffset + (m_lineSize * y) + x) = color;
}
int16_t GfxScreen::getPixel1(int16_t x, int16_t y)
{
uint8_t *ptr = m_activeOffset + 0x2000*(y%2) + m_lineSize*(y/2) + (x/8);
int mask = (1<<7) >> (x%8);
uint8_t temp = *ptr;
return (bool)(temp & mask);
}
int16_t GfxScreen::getPixel2(int16_t x, int16_t y)
{
uint8_t *ptr = m_activeOffset + 0x2000*(y%2) + m_lineSize*(y/2) + (2*x/8);
uint8_t temp = *ptr;
temp >>= 6 - (2*x%8);
temp &= 0x3;
return temp;
}
int16_t GfxScreen::getPixel4(int16_t x, int16_t y)
{
if(x < 0 || x > m_maxx || y < 0 || y > m_maxy) {
return -1;
}
uint8_t *cell = (m_activeOffset + (m_lineSize * y) + x/8);
int16_t value = 0;
uint8_t bit = x & 7;
GCR_OUT(GCR_READMAP_SEL, 0);
value |= ((*cell)>>bit)&1;
GCR_OUT(GCR_READMAP_SEL, 1);
value |= (((*cell)>>bit)&1) << 1;
GCR_OUT(GCR_READMAP_SEL, 2);
value |= (((*cell)>>bit)&1) << 2;
GCR_OUT(GCR_READMAP_SEL, 3);
value |= (((*cell)>>bit)&1) << 3;
return value;
}
int16_t GfxScreen::getPixel8(int16_t x, int16_t y)
{
// clip to the mode width and height
if (x < 0 || x > m_maxx || y < 0 || y > m_maxy) {
return -1;
}
// set the mask so that only one pixel gets read
outp(GCR_ADDR, 0x04);
outp(GCR_DATA, x & 0x3);
return *(m_activeOffset + (m_lineSize * y) + (x >> 2));
}
int16_t GfxScreen::getPixel8chained(int16_t x, int16_t y)
{
// clip to the mode width and height
if (x < 0 || x > m_maxx || y < 0 || y > m_maxy) {
return -1;
}
return *(m_activeOffset + (m_lineSize * y) + x);
}
void GfxScreen::drawLine(int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint8_t color)
{
// Lines are NOT clipped.
//
// Algorithm derived from:
// Digital Line Drawing by Paul Heckbert
// from "Graphics Gems", Academic Press, 1990
//
int16_t x = x1;
int16_t y = y1;
int16_t dx = x2 - x1;
int16_t ax = abs(dx) << 1;
int16_t sx = sign(dx);
int16_t dy = y2 - y1;
int16_t ay = abs(dy) << 1;
int16_t sy = sign(dy);
int16_t d;
if(ax > ay) {
// x dominant
d = ay - (ax >> 1);
while(true) {
putPixel(x, y, color);
if(x == x2) {
return;
}
if(d >= 0) {
y += sy;
d -= ax;
}
x += sx;
d += ay;
}
} else {
// y dominant
d = ax - (ay >> 1);
while(true) {
putPixel(x, y, color);
if(y == y2) {
return;
}
if(d >= 0) {
x += sx;
d -= ay;
}
y += sy;
d += ax;
}
}
}
void GfxScreen::drawCircle(int16_t cx, int16_t cy, int16_t r, uint8_t color)
{
int32_t n=0, invradius=(1/(float)r)*0x10000L;
int16_t dx=0, dy=r-1;
putPixel(cx, cy, color);
while(dx<=dy)
{
putPixel(cx+dy, cy-dx, color); // octant 0
putPixel(cx+dx, cy-dy, color); // octant 1
putPixel(cx-dx, cy-dy, color); // octant 2
putPixel(cx-dy, cy-dx, color); // octant 3
putPixel(cx-dy, cy+dx, color); // octant 4
putPixel(cx-dx, cy+dy, color); // octant 5
putPixel(cx+dx, cy+dy, color); // octant 6
putPixel(cx+dy, cy+dx, color); // octant 7
dx++;
n += invradius;
dy = (int16_t)((r * SIN_ACOS[(int16_t)(n>>6)]) >> 16);
}
}
void GfxScreen::drawRectangle(int16_t x, int16_t y, int16_t width, int16_t height, uint8_t color)
{
int x2 = x+width-1;
int y2 = y+height-1;
drawLine(x, y, x2, y, color);
drawLine(x, y, x, y2, color);
drawLine(x2, y, x2, y2, color);
drawLine(x, y2, x2, y2, color);
}
void GfxScreen::drawChar8(int16_t x, int16_t y, uint8_t color, char c)
{
uint8_t far *font = m_fontAddr + (c * m_fontHeight);
for (int i = 0; i < m_fontHeight; i++) {
uint8_t mask = *font;
for (int j = 0; j < 8; j++) {
if (mask & 0x80) {
putPixel(x + j, y + i, color);
}
mask <<= 1;
}
font++;
}
}
void GfxScreen::drawChar4(int16_t x, int16_t y, uint8_t color, char c)
{
// draws a character in 4-bit / 16-color modes
// C++ version of LISTING 26.1,
// Graphics Programming Black Book by Michael Abrash.
// This function needs write mode 3
uint8_t* vga_offset = m_activeOffset + (y * m_lineSize) + x / 8;
uint8_t xbit = x & 7;
uint8_t far *font = m_fontAddr + c * m_fontHeight;
outp(GCR_ADDR, GCR_ROTATE);
uint8_t rot = inp(GCR_DATA);
rot &= 0xe0;
rot |= xbit;
outp(GCR_DATA, rot);
uint8_t leftmask = 0xff >> xbit;
uint8_t rightmask = 0xff << (-xbit + 8);
volatile uint8_t dummy;
for(uint8_t i=0; i<m_fontHeight; i++) {
GCR_OUT(GCR_BITMASK, leftmask);
dummy = *vga_offset;
*vga_offset = *font;
GCR_OUT(GCR_BITMASK, rightmask);
dummy = *vga_offset;
*vga_offset = *font;
font++;
vga_offset += m_lineSize;
}
}
void GfxScreen::printText(int16_t x, int16_t y, uint8_t color, const char *fmt, ...)
{
char buf[200];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, 200, fmt, ap);
va_end(ap);
drawText(x, y, color, buf);
}
void GfxScreen::drawText8(int16_t x, int16_t y, uint8_t color, const char *string)
{
while(*string) {
drawChar8(x, y, color, *string++);
x += 8;
}
}
void GfxScreen::drawText4(int16_t x, int16_t y, uint8_t color, const char *string)
{
setPlanarRWMode(0,3);
outp(GCR_ADDR, GCR_SETRESET);
uint8_t setrst = inp(GCR_DATA);
setrst &= 0xf0;
setrst |= color & 0x0f;
outp(GCR_DATA, setrst);
while(*string) {
drawChar4(x, y, color, *string++);
x += 8;
}
setPlanarRWMode(0,2);
}
int32_t middleMask[4][4] =
{
{0x1, 0x3, 0x7, 0xf},
{0x0, 0x2, 0x6, 0xe},
{0x0, 0x0, 0x4, 0xc},
{0x0, 0x0, 0x0, 0x8},
};
int32_t leftMask[4] = {0xf, 0xe, 0xc, 0x8};
int32_t rightMask[4] = {0x1, 0x3, 0x7, 0xf};
void GfxScreen::fillRect8(int16_t x, int16_t y, int16_t width, int16_t height, uint8_t color)
{
int32_t x1 = x;
int32_t x2 = x + width - 1;
int32_t y1 = y;
int32_t y2 = y + height - 1;
// clip to the screen.
if(x1 < 0) {
x1 = 0;
}
if(x2 > m_maxx) {
x2 = m_maxx;
}
if(y1 < 0) {
y1 = 0;
}
if (y2 > m_maxy) {
y2 = m_maxy;
}
if(y2 < y1 || x2 < x1) {
return;
}
// in unchained 8bit modes we want to paint from the top down
// and make use of the 4 pixel wide vertical bands
int32_t leftBand = x1 >> 2;
int32_t rightBand = x2 >> 2;
int32_t leftBit = x1 & 3;
int32_t rightBit = x2 & 3;
uint8_t *top;
uint8_t *where;
int32_t mask;
if(leftBand == rightBand) {
// the whole rectangle is in one band
mask = middleMask[leftBit][rightBit];
outp(SEQ_ADDR, 0x02);
outp(SEQ_DATA, mask);
top = m_activeOffset + (m_lineSize * y1) + leftBand;
for(int32_t i = y1; i <= y2; i++) {
*top = color;
top += m_lineSize;
}
} else {
// spans 2 or more bands
mask = leftMask[leftBit];
outp(SEQ_ADDR, 0x02);
outp(SEQ_DATA, mask);
top = m_activeOffset + (m_lineSize * y1) + leftBand;
where = top;
// fill the left edge
for(int32_t i = y1; i <= y2; i++) {
*where = color;
where += m_lineSize;
}
top++;
outp(SEQ_ADDR, 0x02);
outp(SEQ_DATA, 0x0f);
int32_t bands = rightBand - (leftBand + 1);
if(bands > 0) {
where = top;
// fill the middle
for(int32_t i = y1; i <= y2; i++) {
memset(where, color, bands);
where += m_lineSize;
}
top += bands;
}
mask = rightMask[rightBit];
outp(SEQ_ADDR, 0x02);
outp(SEQ_DATA, mask);
where = top;
// fill the right edge
for(int32_t i = y1; i <= y2; i++) {
*where = color;
where += m_lineSize;
}
}
}
void GfxScreen::fillRect8chained(int16_t x, int16_t y, int16_t width, int16_t height, uint8_t color)
{
if(x<0 || y<0 || x>m_maxx || y>m_maxy || width==0 || height==0) {
return;
}
if(x + width > m_width) {
width = m_width - x;
}
if(y + height > m_height) {
height = m_height - y;
}
uint32_t c = color;
c = (c << 8) | color;
c = (c << 8) | color;
c = (c << 8) | color;
uint8_t *lineptr = m_activeOffset + (m_lineSize * y) + x;
int dwords = width / 4;
int bytes = width - dwords * 4;
int linestep = dwords * 4 + (m_width - width);
for(int l=0; l<height; l++) {
for(int b=0; b<bytes; b++) {
*lineptr++ = color;
}
fillLong(lineptr, c, dwords);
lineptr += linestep;
}
}
//---------------------------------------------------
//
// Set one entry in the DAC color palette (256 color mode).
//
void GfxScreen::setColor256(int16_t index, uint16_t r, uint16_t g, uint16_t b)
{
if (index < 0 || index > 255) {
return;
}
while(!(inp(m_isr1_addr) & 0x01)); // wait for blanking
outp(PAL_WRITE_ADDR, index);
outp(PAL_DATA, r);
outp(PAL_DATA, g);
outp(PAL_DATA, b);
}
void GfxScreen::setPalette256(int16_t start, int16_t count, s_color *p)
{
int16_t i;
if(start < 0 || (start + count - 1) > 255) {
return;
}
vsync();
outp(PAL_WRITE_ADDR, start);
for (i = 0; i < count; i++) {
outp(PAL_DATA, p->red);
outp(PAL_DATA, p->green);
outp(PAL_DATA, p->blue);
p++;
}
}
void GfxScreen::setSplitScreen(uint16_t scanline)
{
if(scanline < m_scanlines) {
::setSplitScreen(m_crtc_addr, scanline);
}
}
void GfxScreen::setHPanning(uint8_t hPan)
{
uint16_t isra = 0x03da;
if(m_crtc_addr == CRTC_ADDR_MONO) {
isra = 0x03ba;
}
ACR_OUT(isra, ACR_HPELPAN, hPan);
}
void GfxScreen::setVPanning(uint8_t vPan)
{
int prs;
CRTC_IN(m_crtc_addr, CRTC_PRESET_ROW_SCAN, prs);
prs &= ~0x1f;
prs |= (vPan & 0x1f);
CRTC_OUT(m_crtc_addr, CRTC_PRESET_ROW_SCAN, prs);
}
void GfxScreen::setPanningMode(bool mode)
{
uint16_t isra = 0x03da;
if(m_crtc_addr == CRTC_ADDR_MONO) {
isra = 0x03ba;
}
uint8_t reg;
ACR_IN(isra, ACR_ATTMODE, reg);
reg &= ~0x20;
reg |= (mode << 5);
ACR_OUT(isra, ACR_ATTMODE, reg);
}
void GfxScreen::setStartAddress(uint16_t address)
{
::setStartAddress(m_crtc_addr, address);
}
void GfxScreen::vsync()
{
// wait until any previous retrace has ended
while(inp(m_isr1_addr) & 0x08);
// wait until a new retrace has just begun
while(!(inp(m_isr1_addr) & 0x08));
}
void GfxScreen::wait_disp_enable()
{
while((inp(m_isr1_addr) & 0x01));
}
void GfxScreen::setPlanarRWMode(int rmode, int wmode)
{
outp(GCR_ADDR, 0x05); // R/W mode
uint8_t mode = inp(GCR_DATA) & 0xF4;
mode |= ((rmode&1)<<3) | (wmode&3);
outp(GCR_DATA, mode);
}
void GfxScreen::setStdVGAColorMap()
{
for(int i=0; i<256; i++) m_cval[i] = i;
for(int i=0; i<256; i++) m_cmap[i] = i;
}
//****************************************************************************//
// MODE SETTING
//****************************************************************************//
void selectVGAFreq(int hpels, int lines)
{
uint8_t reg = 0x23; // bit 0,1,5
switch(hpels) {
case 640:
case 320:
break;
case 720:
case 360:
reg |= 0x04;
break;
}
switch(lines) {
default:
case 400: reg |= 0x40; break;
case 350: reg |= 0x80; break;
case 480: reg |= 0xc0; break;
}
SEQ_OUT(0x00,0x01); // synchronous reset while setting Misc Output
outp(MOR_ADDR, reg);
SEQ_OUT(0x00,0x03); // undo reset (restart sequencer)
}
void GfxScreen::mode_b320x200_04h()
{
setBIOSMode(0x04);
m_videoMem = CGA_ADDR;
m_width = 320;
m_height = 200;
m_scanlines = 400;
m_pages = 1;
m_lineOffset = 40;
m_lineSize = 80;
m_chained = 0;
m_pageSize = 16000;
m_modeName = "Mode 04h 320x200x4";
m_colors = 4;
m_putPixelFn = putPixel2;
m_getPixelFn = getPixel2;
m_clearFn = clear2;
m_drawTextFn = drawText8;
memset(m_cval, 0, 256);
m_cval[0] = 0;
m_cval[1] = 1;
m_cval[2] = 2;
m_cval[3] = 3;
m_cmap[c_black ] = 0;
m_cmap[c_blue ] = 1;
m_cmap[c_green ] = 1;
m_cmap[c_cyan ] = 1;
m_cmap[c_red ] = 2;
m_cmap[c_magenta] = 2;
m_cmap[c_brown ] = 0;
m_cmap[c_lgray ] = 3;
m_cmap[c_dgray ] = 0;
m_cmap[c_lblue ] = 1;
m_cmap[c_lgreen ] = 1;
m_cmap[c_lcyan ] = 1;
m_cmap[c_lred ] = 2;
m_cmap[c_pink ] = 2;
m_cmap[c_yellow ] = 3;
m_cmap[c_white ] = 3;
for(int i=16; i<256; i++) {
m_cmap[i] = i%2;
}
}
void GfxScreen::mode_b640x200_06h()
{
setBIOSMode(0x06);
m_videoMem = CGA_ADDR;
m_width = 640;
m_height = 200;
m_scanlines = 400;
m_pages = 1;
m_lineOffset = 40;
m_lineSize = 80;
m_chained = 0;
m_pageSize = 16000;
m_modeName = "Mode 06h 640x200x2";
m_colors = 2;
m_putPixelFn = putPixel1;
m_getPixelFn = getPixel1;
m_clearFn = clear1;
m_drawTextFn = drawText8;
memset(m_cval, 0, 256);
m_cval[0] = 0;
m_cval[1] = 1;
m_cmap[c_black ] = 0;
m_cmap[c_blue ] = 0;
m_cmap[c_green ] = 1;
m_cmap[c_cyan ] = 1;
m_cmap[c_red ] = 1;
m_cmap[c_magenta] = 1;
m_cmap[c_brown ] = 0;
m_cmap[c_lgray ] = 1;
m_cmap[c_dgray ] = 0;
m_cmap[c_lblue ] = 1;
m_cmap[c_lgreen ] = 1;
m_cmap[c_lcyan ] = 1;
m_cmap[c_lred ] = 1;
m_cmap[c_pink ] = 1;
m_cmap[c_yellow ] = 1;
m_cmap[c_white ] = 1;
for(int i=16; i<256; i++) {
m_cmap[i] = i%2;
}
}
void GfxScreen::mode_b320x200_0Dh()
{
setBIOSMode(0x0d);
m_width = 320;
m_height = 200;
m_scanlines = 400;
m_pages = 8;
m_lineOffset = 40;
m_lineSize = 40;
m_chained = 0;
m_pageSize = 32000;
m_modeName = "Mode 0Dh 320x200x16";
m_colors = 16;
m_putPixelFn = putPixel4;
m_getPixelFn = getPixel4;
m_clearFn = clear4;
m_drawTextFn = drawText4;
// put pixel needs write mode 2
setPlanarRWMode(0,2);
setStdVGAColorMap();
}
void GfxScreen::mode_b640x200_0Eh()
{
setBIOSMode(0x0e);
m_width = 640;
m_height = 200;
m_scanlines = 400;
m_pages = 4;
m_lineOffset = 80;
m_lineSize = 80;
m_chained = 0;
m_pageSize = 64000;
m_modeName = "Mode 0Eh 640x200x16";
m_colors = 16;
m_putPixelFn = putPixel4;
m_getPixelFn = getPixel4;
m_clearFn = clear4;
m_drawTextFn = drawText4;
// put pixel needs write mode 2
setPlanarRWMode(0,2);
setStdVGAColorMap();
}
void GfxScreen::mode_b640x350_0Fh()
{
setBIOSMode(0x0f);