Restructure asembler as package

1 files changed, 40 insertions, 0 deletions

diff --git a/nandgame/assembler/createbin_main.py b/nandgame/assembler/createbin_main.py
new file mode 100755
index 0000000..e2497cd
--- /dev/null
+++ b/nandgame/assembler/createbin_main.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+"""
+Basically, iterate all 16-bit numbers,
+or rather, 15-bit, to have valid
+nandgame instructions, skip reserved bits.
+"""
+
+# ENDIANNESS = 'big'
+endianness = "little"
+
+
+def main():
+    with open("allins.bin", "wb") as f:
+        ins = 0x0000
+        # ldi A, 0
+        _ = f.write(ins.to_bytes(2, byteorder=endianness))
+
+        ins = 0x00FF
+        # ldi A, 255
+        _ = f.write(ins.to_bytes(2, byteorder=endianness))
+
+        for ins in range(0x8000, 0xFFFF + 1):
+            # unused bytes, force 1
+            if (ins & 0x6800) != 0x6800:
+                continue
+
+            f.write(ins.to_bytes(2, byteorder=endianness))
+
+
+import sys
+
+if __name__ == "__main__":
+    if len(sys.argv) == 2:
+        if sys.argv[1] in ["little", "le"]:
+            endianness = "little"
+        elif sys.argv[1] in ["big", "be"]:
+            endianness = "big"
+    print(f"Use Endianness: {endianness}")
+    main()