Fix sign extensions from vipRead() and busReadMisc()

2025-01-15 19:47:44 -06:00
1 changed files with 6 additions and 0 deletions
@@ -153,12 +153,18 @@ static void busRead(VB *sim, uint32_t address, int type, int32_t *value) {

        case 0: /* VIP */
            vipRead(sim, address, type, value);
+            switch (type) {
+                case VB_S8 : *value = (int8_t ) *value; break;
+                case VB_S16: *value = (int16_t) *value; break;
+            }
            break;

        case 1: break; /* VSU */

        case 2: /* Misc. I/O */
            *value = busReadMisc(sim, address, type);
+            if (type == VB_S8)
+                *value = (int8_t) *value;
            break;

        case 3: break; /* Unmapped */