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Crtc startup and changed some entries to use vga_resize.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@120
This commit is contained in:
Sjoerd van der Berg 2002-08-08 08:59:14 +00:00
parent 2f5c031805
commit bed0f7e8a6
1 changed files with 11 additions and 18 deletions
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29
src/hardware/vga_crtc.cpp
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@ -28,6 +28,11 @@ void write_p3d4(Bit32u port,Bit8u val) {
crtc(index)=val;
}
Bit8u read_p3d4(Bit32u port) {
return crtc(index);
}
void write_p3d5(Bit32u port,Bit8u val) {
switch(crtc(index)) {
case 0x00: /* Horizontal Total Register */
@ -37,7 +42,7 @@ void write_p3d5(Bit32u port,Bit8u val) {
case 0x01: /* Horizontal Display End Register */
crtc(horizontal_display_end)=val;
vga.config.hdisplayend=val+1;
VGA_FindSettings();
VGA_StartResize();
/* 0-7 Number of Character Clocks Displayed -1 */
break;
case 0x02: /* Start Horizontal Blanking Register */
@ -78,8 +83,8 @@ void write_p3d5(Bit32u port,Bit8u val) {
break;
case 0x07: /* Overflow Register */
crtc(overflow)=val;
vga.config.vdisplayend=(vga.config.vdisplayend&0xFF)|((val&2)<<7)|((val&64)<<2);
VGA_FindSettings();
vga.config.vdisplayend=(vga.config.vdisplayend&0xFF)|(((val>>1) & 1)<<8)|(((val>>6) & 1)<<9);
VGA_StartResize();
/*
0 Bit 8 of Vertical Total (3d4h index 6)
1 Bit 8 of Vertical Display End (3d4h index 12h)
@ -108,7 +113,7 @@ void write_p3d5(Bit32u port,Bit8u val) {
crtc(maximum_scan_line)=val;
vga.config.vline_double=(val & 128)>1;
vga.config.vline_height=(val & 0xf);
VGA_FindSettings();
VGA_StartResize();
/*
0-4 Number of scan lines in a character row -1. In graphics modes this is
the number of times (-1) the line is displayed before passing on to
@ -183,7 +188,7 @@ void write_p3d5(Bit32u port,Bit8u val) {
case 0x12: /* Vertical Display End Register */
crtc(vertical_display_end)=val;
vga.config.vdisplayend=(vga.config.vdisplayend & 0x300)|val;
VGA_FindSettings();
VGA_StartResize();
/*
0-7 Lower 8 bits of Vertical Display End. The display ends when the line
counter reaches this value. Bit 8 is found in 3d4h index 7 bit 1.
@ -193,7 +198,7 @@ void write_p3d5(Bit32u port,Bit8u val) {
case 0x13: /* Offset register */
crtc(offset)=val;
vga.config.scan_len=val;
VGA_FindSettings();
VGA_StartResize();
/*
0-7 Number of bytes in a scanline / K. Where K is 2 for byte mode, 4 for
word mode and 8 for Double Word mode.
@ -317,16 +322,4 @@ Bit8u read_p3d5(Bit32u port) {
void VGA_SetupCRTC(void) {
IO_RegisterWriteHandler(0x3d4,write_p3d4,"VGA:CRTC Index Select");
IO_RegisterWriteHandler(0x3d5,write_p3d5,"VGA:CRTC Data Register");
IO_RegisterReadHandler(0x3d5,read_p3d5,"VGA:CRTC Data Register");
// IO_RegisterWriteHandler(0x3b4,write_p3d4,"VGA:CRTC Index Select");
// IO_RegisterWriteHandler(0x3b5,write_p3d5,"VGA:CRTC Data Register");
// IO_RegisterReadHandler(0x3b5,read_p3d5,"VGA:CRTC Data Register");
}