From 63d5b3448f0390511e2d8bce7ce5285a411650eb Mon Sep 17 00:00:00 2001
From: zanostro <zan.skvarca@gmail.com>
Date: Sat, 15 Nov 2025 12:16:56 +0100
Subject: [PATCH] added stack

---
 ass1/stack.asm | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 ass1/stack.asm

diff --git a/ass1/stack.asm b/ass1/stack.asm
new file mode 100644
index 0000000..e476b73
--- /dev/null
+++ b/ass1/stack.asm
@@ -0,0 +1,56 @@
+.code
+
+stack   START   0
+
+	LDA   #9
+   	STA   @stackptr
+   	JSUB  stackpush     . PUSHA
+
+  	JSUB  stackpop      . POPA
+	LDA   @stackptr
+
+halt    J       halt
+
+
+stackinit
+        STA     stacktmp       
+
+        LDA     #STACK          
+        STA     stackptr       
+
+        LDA     stacktmp        
+        RSUB
+
+
+stackpush
+        STA     stacktmp        
+
+        LDA     stackptr
+        ADD     #3              
+        STA     stackptr
+
+        LDA     stacktmp        
+        RSUB
+
+
+stackpop
+        STA     stacktmp        
+
+        LDA     stackptr
+        SUB     #3              
+        STA     stackptr
+
+        LDA     stacktmp        
+        RSUB
+
+
+.data
+
+stackptr    WORD    0
+
+stacktmp    WORD    0
+
+STACKSIZE   EQU     50          
+STACK       RESW    STACKSIZE
+
+        END     stack