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- committed vga patch for yamit. I'm not really sure how the standard vga card

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behaves in text mode memory mappings 0 & 1.
This commit is contained in:
Christophe Bothamy 2002-09-13 00:11:49 +00:00
parent ea76dbe210
commit 8a9992998e
1 changed files with 35 additions and 1 deletions
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36
bochs/iodev/vga.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: vga.cc,v 1.39 2002-09-08 07:56:10 vruppert Exp $
// $Id: vga.cc,v 1.40 2002-09-13 00:11:49 cbothamy Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -1469,6 +1469,40 @@ bx_vga_c::update(void)
switch (BX_VGA_THIS s.graphics_ctrl.memory_mapping) {
case 0: // 128K @ A0000
case 1: // 64K @ A0000
iWidth = 8*80; // TODO: should use font size
iHeight = 16*25;
if( (iWidth != old_iWidth) || (iHeight != old_iHeight) )
{
bx_gui.dimension_update(iWidth, iHeight, 16);
old_iWidth = iWidth;
old_iHeight = iHeight;
}
//BX_DEBUG(("update(): case 2"));
/* pass old text snapshot & new VGA memory contents */
start_address = 0x0;
cursor_address = 2*((BX_VGA_THIS s.CRTC.reg[0x0e] << 8) |
BX_VGA_THIS s.CRTC.reg[0x0f]);
if (cursor_address < start_address) {
cursor_x = 0xffff;
cursor_y = 0xffff;
}
else {
cursor_x = ((cursor_address - start_address)/2) % 80;
cursor_y = ((cursor_address - start_address)/2) / 80;
}
cursor_state = (bx_vga.s.CRTC.reg[0x0a] << 8) | bx_vga.s.CRTC.reg[0x0b];
bx_gui.text_update(BX_VGA_THIS s.text_snapshot,
&BX_VGA_THIS s.vga_memory[start_address],
cursor_x, cursor_y, cursor_state, 25);
// screen updated, copy new VGA memory contents into text snapshot
memcpy(BX_VGA_THIS s.text_snapshot,
&BX_VGA_THIS s.vga_memory[start_address],
2*80*25);
BX_VGA_THIS s.vga_mem_updated = 0;
break;
case 2: // B0000 .. B7FFF
iWidth = 8*80; // TODO: should use font size
iHeight = 16*25;