From f14cf20c92097f0fa1ad78f3a916a16f74706ee3 Mon Sep 17 00:00:00 2001 From: Paul Gardner-Stephen Date: Sun, 5 May 2019 00:54:53 +0930 Subject: [PATCH] explicitly compare read result with zero now that under ROM routines preserve P --- c64/basic/peek_pointer_null_check.s | 2 ++ 1 file changed, 2 insertions(+) diff --git a/c64/basic/peek_pointer_null_check.s b/c64/basic/peek_pointer_null_check.s index a476ae53..ff30acfb 100644 --- a/c64/basic/peek_pointer_null_check.s +++ b/c64/basic/peek_pointer_null_check.s @@ -4,9 +4,11 @@ peek_pointer_null_check: ldy #$00 jsr peek_under_roms + cmp #$00 bne ptr_not_null iny jsr peek_under_roms + cmp #$00 bne ptr_not_null ;; Pointer is NULL