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8514/a: Add some sanity checks.

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OBattler
2025-07-27 15:47:02 +02:00
parent 858594088c
commit 7f2d3c4d1c
1 changed files with 9 additions and 0 deletions
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9
src/video/vid_8514a.c
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@@ -334,6 +334,9 @@ ibm8514_accel_out_fifo(svga_t *svga, uint16_t port, uint32_t val, int len)
{ {
ibm8514_t *dev = (ibm8514_t *) svga->dev8514; ibm8514_t *dev = (ibm8514_t *) svga->dev8514;
if (dev == NULL)
return;
if (port & 0x8000) { if (port & 0x8000) {
if ((port != 0xe2e8) && (port != 0xe2e9) && (port != 0xe6e8) && (port != 0xe6e9)) { if ((port != 0xe2e8) && (port != 0xe2e9) && (port != 0xe6e8) && (port != 0xe6e9)) {
if (port & 0x4000) if (port & 0x4000)
@@ -743,6 +746,9 @@ ibm8514_accel_out(uint16_t port, uint32_t val, svga_t *svga, int len)
{ {
ibm8514_t *dev = (ibm8514_t *) svga->dev8514; ibm8514_t *dev = (ibm8514_t *) svga->dev8514;
if (dev == NULL)
return;
if (port & 0x8000) { if (port & 0x8000) {
if (dev->accel.cmd_back) { if (dev->accel.cmd_back) {
dev->fifo_idx++; dev->fifo_idx++;
@@ -777,6 +783,9 @@ ibm8514_accel_in_fifo(svga_t *svga, uint16_t port, int len)
uint16_t temp = 0; uint16_t temp = 0;
int cmd = 0; int cmd = 0;
if (dev == NULL)
return 0xffff;
switch (port) { switch (port) {
case 0x82e8: case 0x82e8:
if (len == 2) if (len == 2)