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Allow setting width in text mode. Fixes tetris in freedos

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copy 2014-10-13 21:58:49 +02:00
parent e8c105e627
commit 359509c6bb
1 changed files with 9 additions and 3 deletions
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12
src/vga.js
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@ -101,6 +101,9 @@ function VGAScreen(cpu, adapter, vga_memory_size)
/** @type {number} */
this.svga_height = 0;
/** @type {number} */
this.text_mode_width = 80;
this.plane0;
this.plane1;
this.plane2;
@ -846,7 +849,7 @@ VGAScreen.prototype.set_video_mode = function(mode)
switch(mode)
{
case 0x03:
this.set_size_text(80, 25);
this.set_size_text(this.text_mode_width, 25);
break;
case 0x10:
this.screen_width = 640;
@ -1087,15 +1090,18 @@ VGAScreen.prototype.port3D5_write = function(value)
{
switch(this.index_crtc)
{
case 0x2:
this.text_mode_width = value;
break;
case 0x9:
this.max_scan_line = value;
if((value & 0x1F) === 7)
{
this.set_size_text(80, 50);
this.set_size_text(this.text_mode_width, 50);
}
else
{
this.set_size_text(80, 25);
this.set_size_text(this.text_mode_width, 25);
}
break;
case 0xA: