From 528c269cdd16509e5484c8d24eb39d4388d8ce03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miran=20Gr=C4=8Da?= <oubattler@gmail.com>
Date: Wed, 11 Oct 2023 18:33:01 +0200
Subject: [PATCH] The INS and OUTS instruction on V20/V30 now increase/decrease
 the correct registers, fixes #3723.

---
 src/cpu/808x.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/cpu/808x.c b/src/cpu/808x.c
index 0d5cc3e9a..43927d84d 100644
--- a/src/cpu/808x.c
+++ b/src/cpu/808x.c
@@ -1960,18 +1960,18 @@ stos(int bits)
 static void
 ins(int bits)
 {
-    cpu_state.eaaddr = SI;
+    cpu_state.eaaddr = DI;
     cpu_io(bits, 0, cpu_state.eaaddr);
-    SI = string_increment(bits);
+    DI = string_increment(bits);
 }
 
 static void
 outs(int bits)
 {
-    cpu_state.eaaddr = DI;
+    cpu_state.eaaddr = SI;
     cpu_data         = (bits == 16) ? AX : AL;
     cpu_io(bits, 1, cpu_state.eaaddr);
-    DI = string_increment(bits);
+    SI = string_increment(bits);
 }
 
 static void