SM(S)C FDC 37c6xx: Return 0xFF on out of bound register read, fixes segmentation fault on the DEC Venturis 4xx.

2025-05-06 19:29:30 +02:00
parent ef3f57b338
commit 93025cc115
1 changed files with 1 additions and 1 deletions
--- a/src/sio/sio_fdc37c6xx.c
+++ b/src/sio/sio_fdc37c6xx.c
@@ -232,7 +232,7 @@ fdc37c6xx_read(uint16_t port, void *priv)
    uint8_t            ret = 0xff;

    if (dev->tries == 2) {
-        if (port == 0x3f1)
+        if ((port == 0x3f1) && (dev->cur_reg <= dev->max_reg))
            ret = dev->regs[dev->cur_reg];
    }