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Voodoo 1/2: Final attempt to implement byte writes correctly.

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Simply shift byte to the right position and write 0's elsewhere.
This commit is contained in:
Volker Ruppert 2024-01-28 16:57:17 +01:00
parent 4de017762a
commit 14f6753ad8
1 changed files with 1 additions and 5 deletions
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6
bochs/iodev/display/voodoo.cc
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@ -1065,11 +1065,7 @@ void bx_voodoo_1_2_c::mem_write(bx_phy_address addr, unsigned len, void *data)
voodoo_w((addr >> 2) & 0x3FFFFF, (Bit32u)value, 0x0000ffff);
}
} else if (len == 1) {
Bit32u value2 = voodoo_r((addr >> 2) & 0x3FFFFF);
Bit32u mask = (Bit32u)0xff << (8 * (addr & 3));
value2 &= ~mask;
value2 |= ((Bit32u)value << (8 * (addr & 3)));
voodoo_w((addr >> 2) & 0x3FFFFF, value2, 0xffffffff);
voodoo_w((addr >> 2) & 0x3FFFFF, (Bit32u)(value << (8 * (addr & 3))), 0xffffffff);
} else {
BX_ERROR(("Voodoo mem_write(): unknown len=%d", len));
}