From 21d45b9a201234f3da4244015c4a6973c48e8fa6 Mon Sep 17 00:00:00 2001
From: uvok
Date: Wed, 7 Jan 2026 19:41:03 +0100
Subject: disas: endianness

---
 nandgame/assembler/disas.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'nandgame/assembler')

diff --git a/nandgame/assembler/disas.py b/nandgame/assembler/disas.py
index ea6cfcf..b8f5dba 100755
--- a/nandgame/assembler/disas.py
+++ b/nandgame/assembler/disas.py
@@ -15,6 +15,8 @@ JUMP_NONE = ""
 JUMPS_IF_NZERO = ["jgt", "jlt", "jne", "jmp"]
 JUMPS_IF_ZERO = ["jge", "jle", "jeq", "jmp"]
 
+ENDIANNESS = "little"
+
 def decode_jump(ins: int) -> str:
     if (ins & 0x7) == 0:
         return JUMP_NONE
@@ -203,8 +205,13 @@ def main():
                 insb = f.read(2)
                 if not insb:
                     break
-                ins = int.from_bytes(insb)
-                raw_ins = f"{insb[0]:02x} {insb[1]:02x}"
+                ins = int.from_bytes(insb, byteorder=ENDIANNESS)
+                if ENDIANNESS in ["big", "be"]:
+                    raw_ins = f"{insb[0]:02x} {insb[1]:02x}"
+                elif ENDIANNESS in ["little", "le"]:
+                    raw_ins = f"{insb[1]:02x} {insb[0]:02x}"
+                else:
+                    raw_ins = f"?? ??"
                 decoded_ins = print_decoded(ins, False)
                 decoded_ins2 = print_decoded(ins, True)
                 if decoded_ins == decoded_ins2:
-- 
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