diff options
| -rw-r--r-- | .gitignore | 2 | ||||
| -rwxr-xr-x | nandgame/assembler/createbin.py | 14 | ||||
| -rwxr-xr-x | nandgame/assembler/disas.py | 29 |
3 files changed, 45 insertions, 0 deletions
@@ -7,3 +7,5 @@ *.vvp *.lxt2 verilator.*/ +*.bin + diff --git a/nandgame/assembler/createbin.py b/nandgame/assembler/createbin.py new file mode 100755 index 0000000..d4a2e7a --- /dev/null +++ b/nandgame/assembler/createbin.py @@ -0,0 +1,14 @@ +#!/usr/bin/env python3 + + +with open("allins.bin", "wb") as f: + ins=0x0000 + # ldi A, 0 + f.write(ins.to_bytes(2)) + + ins=0x00ff + # ldi A, 255 + f.write(ins.to_bytes(2)) + + for ins in range(0x8000, 0xffff + 1): + f.write(ins.to_bytes(2)) diff --git a/nandgame/assembler/disas.py b/nandgame/assembler/disas.py new file mode 100755 index 0000000..a68acf4 --- /dev/null +++ b/nandgame/assembler/disas.py @@ -0,0 +1,29 @@ +#!/usr/bin/env python3 + +import sys + +if len(sys.argv) != 2: + print(f"Usage: {sys.argv[0]} [filename]") + sys.exit(1) + +def decode(ins: int) -> str: + if (ins & 0x8000 == 0): + # mov? ldr? ldi? aaaaaaaaaaa.... + return f"mov A, #{ins}" + else: + return "<unknown>" + +try: + with open(sys.argv[1], "rb") as f: + while True: + insb = f.read(2) + if not insb: break + ins = int.from_bytes(insb) + print(f"\t{insb[0]:02x} {insb[1]:02x}\t{decode(ins)}") + +except FileNotFoundError: + print(f"File not found.") + sys.exit(1) +# head, tail... +except BrokenPipeError: + sys.exit(0) |