Fixed LOCK legality with prefixes, closes #4189.

2024-02-23 07:10:15 +01:00
parent 4ee4e8f2b7
commit 6de7c7cd5e
7 changed files with 193 additions and 58 deletions
--- a/src/cpu/386.c
+++ b/src/cpu/386.c
@@ -280,7 +280,10 @@ exec386_2386(int32_t cycs)

                cpu_state.pc++;
                cpu_state.eflags &= ~(RF_FLAG);
+                if (opcode == 0xf0)
+                    in_lock = 1;
                x86_2386_opcodes[(opcode | cpu_state.op32) & 0x3ff](fetchdat);
+                in_lock = 0;
                if (x86_was_reset)
                    break;
            }