From 467ec78e894c8184144bfac039dc7d780abbd050 Mon Sep 17 00:00:00 2001
From: krolxon <krolyxon@tutanota.com>
Date: Thu, 8 Jan 2026 19:21:43 +0530
Subject: add SYS instruction

---
 README.md | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'README.md')

diff --git a/README.md b/README.md
index 717351e..af5513c 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@
 | MUL         | mul r1, r2     |
 | DIV         | div r1, r2     |
 | CALL        | call \<label\>     |
+| SYS         | sys \<syscall_no\> |
 | HLT (Halt)  | hlt              |
 
 
@@ -33,6 +34,7 @@
 | PC       | 16-bit | Program Counter                |
 | SP       | 16-bit | Stack pointer                  |
 
+
 ## Flags
 | Flag  | Description  |
 | ----- | ------------ |
@@ -40,6 +42,14 @@
 | C     | Carry/Borrow |
 
 
+## Syscalls
+| Imm | Meaning |
+| --- | ------- |
+| 0   | Exit Program |
+| 1   | Print register A as integer |
+| 2   | Print register A as ASCII char |
+
+
 # Usage
 ```bash
 cargo run -- --f <examples/filename.asc>
@@ -49,11 +59,12 @@ cargo run -- --f <examples/filename.asc>
 - [x] Assembler
     - [x] Lexer/Tokenizer
     - [x] Add label support (supporting JMP/JZ/JNZ)
-- [ ] Add instructions
+- [x] Add instructions
     - [x] CMP
     - [x] MUL
     - [x] DIV
     - [x] CALL
     - [x] RET
-- [ ] Error handling
-- [ ] Build Debugger
+    - [x] SYS
+- [ ] Better Error handling
+- [ ] TUI Debugger
-- 
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