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Mach32 LFB changes (March 8th, 2025)

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The Byte Write access of the LFB of the Mach32 was not correctly taking account of the subtraction of the address, this fixes possible graphics bugs using the LFB (Linear Aperture).
This commit is contained in:
TC1995
2025-03-08 20:58:49 +01:00
parent 9c5efcf6a5
commit dad0a37ab3
1 changed files with 4 additions and 3 deletions
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7
src/video/vid_ati_mach8.c
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@@ -5226,7 +5226,7 @@ mach32_ap_writeb(uint32_t addr, uint8_t val, void *priv)
uint8_t port_dword = addr & 0xfc;
if (((mach->local_cntl & 0x20) || (mach->pci_cntl_reg & 0x80)) &&
(((addr - mach->linear_base) >= ((mach->ap_size << 20) - 0x200)) && (addr < (mach->ap_size << 20)))) {
(((addr - mach->linear_base) >= ((mach->ap_size << 20) - 0x200)) && ((addr - mach->linear_base) < (mach->ap_size << 20)))) {
if (addr & 0x100) {
mach_log("Port WORDB Write=%04x.\n", 0x02ee + (port_dword << 8));
mach_accel_outb(0x02ee + (addr & 1) + (port_dword << 8), val, mach);
@@ -5279,6 +5279,9 @@ mach32_ap_writel(uint32_t addr, uint32_t val, void *priv)
const ibm8514_t *dev = (ibm8514_t *) svga->dev8514;
uint8_t port_dword = addr & 0xfc;
mach_log("Linear WORDL Write=%08x, val=%08x, ON=%x, dpconfig=%04x, apsize=%08x.\n",
addr - mach->linear_base, val, dev->on, mach->accel.dp_config, mach->ap_size << 20);
if (((mach->local_cntl & 0x20) || (mach->pci_cntl_reg & 0x80)) &&
(((addr - mach->linear_base) >= ((mach->ap_size << 20) - 0x200)) && ((addr - mach->linear_base) < (mach->ap_size << 20)))) {
if (addr & 0x100) {
@@ -5291,8 +5294,6 @@ mach32_ap_writel(uint32_t addr, uint32_t val, void *priv)
mach_accel_outw(0x02e8 + (port_dword << 8) + 4, val >> 16, mach);
}
} else {
mach_log("Linear WORDL Write=%08x, val=%08x, ON=%x, dpconfig=%04x, apsize=%08x.\n",
addr - mach->linear_base, val, dev->on, mach->accel.dp_config, mach->ap_size << 20);
if (dev->on)
mach32_writel_linear(addr, val, mach);
else