From: Marco van den Heuvel <blackystardust68@yahoo.com>
Date: Tue, 20 Mar 2018 21:05:55 +0000 (-0700)
Subject: Set X register to 0 so that 16bit promotion works as expected.
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=refs%2Fpull%2F619%2Fhead;p=cc65

Set X register to 0 so that 16bit promotion works as expected.
---

diff --git a/libsrc/c128/isfast.s b/libsrc/c128/isfast.s
index 01b597371..d40e2c7e9 100644
--- a/libsrc/c128/isfast.s
+++ b/libsrc/c128/isfast.s
@@ -14,6 +14,7 @@
 
         lda     VIC_CLK_128
         and     #$01
+        ldx     #$00
         rts
 
 .endproc