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Banshee/Voodoo3 fixes in mem_write_linear (issue #231).

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- Applied memory mask to start address.
- Consider half mode and double width for redraw setup.
This commit is contained in:
Volker Ruppert 2024-01-25 19:57:28 +01:00
parent 437ddc96fc
commit 30a61c2a51
1 changed files with 8 additions and 1 deletions
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9
bochs/iodev/display/banshee.cc
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@ -1024,7 +1024,7 @@ void bx_banshee_c::mem_write(bx_phy_address addr, unsigned len, void *data)
void bx_banshee_c::mem_write_linear(Bit32u offset, Bit64u value, unsigned len)
{
Bit8u value8;
Bit32u start = v->banshee.io[io_vidDesktopStartAddr];
Bit32u start = v->banshee.io[io_vidDesktopStartAddr] & v->fbi.mask;
Bit32u pitch = v->banshee.io[io_vidDesktopOverlayStride] & 0x7fff;
unsigned i, w, x, y;
@ -1047,6 +1047,13 @@ void bx_banshee_c::mem_write_linear(Bit32u offset, Bit64u value, unsigned len)
x = (offset % pitch) / (v->banshee.disp_bpp >> 3);
y = offset / pitch;
w = len / (v->banshee.disp_bpp >> 3);
if (v->banshee.half_mode) {
y <<= 1;
}
if (v->banshee.double_width) {
x <<= 1;
w <<= 1;
}
if (w == 0) w = 1;
theVoodooVga->redraw_area(x, y, w, 1);
}