From ed2fa6e7d20a3185cfe698608819c9d11d713ee6 Mon Sep 17 00:00:00 2001
From: Joshua Bell <inexorabletash@gmail.com>
Date: Fri, 6 Oct 2023 22:11:36 -0700
Subject: [PATCH] No-Slot Clock: Hit PTRIG to slow ZIP/IIc+ accelerator before
 reading

This appears to improve reliability when reading the NSC on the
IIc+. More data is probably needed before declaring this a really
good solution, but "it works on my machine!"
---
 clocks/ns.clock/ns.clock.system.s | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clocks/ns.clock/ns.clock.system.s b/clocks/ns.clock/ns.clock.system.s
index f616e3f..abcaad0 100644
--- a/clocks/ns.clock/ns.clock.system.s
+++ b/clocks/ns.clock/ns.clock.system.s
@@ -278,6 +278,7 @@ loop:   lda     driver,y
 driver:
         php
         sei
+        lda     PTRIG           ; Slow ZIP, IIc+ accelerator, etc
         lda     $C00B           ; Ultrawarp bug workaround c/o @bobbimanners
 ld4:    lda     $CFFF           ; self-modified ($CFFF or RDCXROM)
         pha