From cb186b0f3b5e605c3296c1eb2e8f46d1041ea03b Mon Sep 17 00:00:00 2001
From: n loewen <nick@nloewen.com>
Date: Wed, 2 Aug 2023 15:09:35 +0100
Subject: [PATCH] Create test program for ADD and SUB

---
 test-programs/add-sub.asm | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 test-programs/add-sub.asm

diff --git a/test-programs/add-sub.asm b/test-programs/add-sub.asm
new file mode 100644
index 0000000..2052728
--- /dev/null
+++ b/test-programs/add-sub.asm
@@ -0,0 +1,18 @@
+;; test addition and substraction
+;  with direct addressing...
+LDA $FE
+ADD $01 ; $FF
+ADD $01 ; $00 + CF=1
+ADD $01 ; $01 + CF=0
+SUB $01 ; $00 + CF=0
+SUB $01 ; $FF + CF=1
+;  and with indirect...
+LDA $01
+STO $00
+LDA $FE
+ADD ($00) ; $FF
+ADD ($00) ; $00 + CF=1
+ADD ($00) ; $01 + CF=0
+SUB ($00) ; $00 + CF=0
+SUB ($00) ; $00 + CF=1
+END
\ No newline at end of file