From 6474252ed4d059abec8676b48fab4a175fb9b664 Mon Sep 17 00:00:00 2001
From: Derek Peschel <derek.peschel@gmail.com>
Date: Fri, 15 Sep 2023 02:28:56 -0700
Subject: [PATCH] Stop ptp_svc from setting the ios bit; sim_instr never clears
 it and simulation loops.

The CPU-to-device routines and device service routines need a redesign.
In the meantime, this quick patch makes tape punching possible.
---
 TX-0/tx0_stddev.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/TX-0/tx0_stddev.c b/TX-0/tx0_stddev.c
index 91e76264..34d2d4b7 100644
--- a/TX-0/tx0_stddev.c
+++ b/TX-0/tx0_stddev.c
@@ -524,7 +524,6 @@ int32 ptp (int32 inst, int32 dev, int32 dat)
 
 t_stat ptp_svc (UNIT *uptr)
 {
-    ios = 1;                                            /* restart */
     iosta = iosta | IOS_PTP;                                /* set flag */
     if ((uptr->flags & UNIT_ATT) == 0)                      /* not attached? */
         return SCPE_UNATT;