Non-808x interpreters: fetch the next instruction after a CR0 paging bit toggle with the old CR0 paging bit value, fixes SCO Unix.

2024-08-27 02:34:59 +02:00
parent f9b80f1a10
commit 7c7cc921ee
8 changed files with 79 additions and 15 deletions
--- a/src/cpu/386.c
+++ b/src/cpu/386.c
@@ -304,6 +304,14 @@ exec386_2386(int32_t cycs)
                cpu_state.pc &= 0xffff;
 #endif

+            if (cpu_flush_pending == 1)
+                cpu_flush_pending++;
+            else if (cpu_flush_pending == 2) {
+                cpu_flush_pending = 0;
+                cr0 ^= 0x80000000;
+                flushmmucache();
+            }
+
            if (cpu_end_block_after_ins)
                cpu_end_block_after_ins--;