From 2a2276dbee5c46b123698287e73b370c054da4c7 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Thu, 3 Nov 2022 01:04:21 +0100
Subject: [PATCH] On the NEC V20/V30, REP string instructions with segment
 override move IP back one further byte on a hardware interrupt, fixes V20
 detection on HWiNFO16.

---
 src/cpu/808x.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/cpu/808x.c b/src/cpu/808x.c
index b9e4a34c4..ade656dd8 100644
--- a/src/cpu/808x.c
+++ b/src/cpu/808x.c
@@ -1084,7 +1084,10 @@ rep_action(int bits)
     if (irq_pending() && (repeating != 0)) {
         access(71, bits);
         pfq_clear();
-        set_ip(cpu_state.pc - 2);
+        if (is_nec && (ovr_seg != NULL))
+           set_ip(cpu_state.pc - 3);
+        else
+           set_ip(cpu_state.pc - 2);
         t = 0;
     }
     if (t == 0) {