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Fixes for VBE 4-bpp modes support.

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Row address must be 32 bit wide and VGA compatible display end is limited to 1023.
TODO: Fix VGA compatible setup for VBE modes in VGABIOS.
This commit is contained in:
Volker Ruppert 2024-02-03 18:02:10 +01:00
parent cd0feed380
commit 6391cf0093
1 changed files with 7 additions and 2 deletions
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9
bochs/iodev/display/vga.cc
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@ -578,9 +578,14 @@ void bx_vga_c::update(void)
unsigned r, c, x, y;
unsigned xc, yc, xti, yti;
Bit8u *plane[4];
Bit16u row_addr;
Bit32u row_addr;
BX_VGA_THIS determine_screen_dimensions(&iHeight, &iWidth);
if (BX_VGA_THIS vbe.yres < 1024) {
BX_VGA_THIS determine_screen_dimensions(&iHeight, &iWidth);
} else {
iWidth = BX_VGA_THIS vbe.xres;
iHeight = BX_VGA_THIS vbe.yres;
}
if ((iWidth != BX_VGA_THIS s.last_xres) || (iHeight != BX_VGA_THIS s.last_yres) ||
(BX_VGA_THIS s.last_bpp > 8)) {
bx_gui->dimension_update(iWidth, iHeight);