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Implementing 64 bit read access to VRAM fixes background pattern issues in XP.

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This commit is contained in:
Volker Ruppert 2020-09-18 15:24:12 +00:00
parent fa36ec0e87
commit 439152d2e4
1 changed files with 6 additions and 3 deletions
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9
bochs/iodev/display/banshee.cc
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@ -777,7 +777,7 @@ bx_bool bx_banshee_c::mem_write_handler(bx_phy_address addr, unsigned len,
void bx_banshee_c::mem_read(bx_phy_address addr, unsigned len, void *data)
{
Bit32u value = 0xffffffff;
Bit64u value = BX_MAX_BIT64U;
Bit32u offset = (addr & 0x1ffffff);
Bit32u pitch = v->banshee.io[io_vidDesktopOverlayStride] & 0x7fff;
unsigned i, x, y;
@ -835,7 +835,7 @@ void bx_banshee_c::mem_read(bx_phy_address addr, unsigned len, void *data)
}
value = 0;
for (i = 0; i < len; i++) {
value |= (v->fbi.ram[offset + i] << (i*8));
value |= ((Bit64u)v->fbi.ram[offset + i] << (i*8));
}
}
switch (len) {
@ -845,8 +845,11 @@ void bx_banshee_c::mem_read(bx_phy_address addr, unsigned len, void *data)
case 2:
*((Bit16u*)data) = (Bit16u)value;
break;
case 4:
*((Bit32u*)data) = (Bit32u)value;
break;
default:
*((Bit32u*)data) = value;
*((Bit64u*)data) = value;
}
}