DOS ain't dead

Disgusted by FreeDOS 1.3RC installation CD (Users)

posted by Ringding, 03.05.2021, 20:36

This reproduces the function of REPACK.C in Python:

import sys
def main():
    outl = []
    bb = b"".join(open(sys.argv[1], "rb").read().split(b"\r\n"))
    for p in range(0, len(bb)-1, 16):
        t = bb[p:p+16]
        d = 0
        for n in range(4):
            v = 0
            for m in reversed(t[:4]):
                v = v*92 + m-34
            d = (d<<26) + v
            t = t[4:]
        outl.append(d.to_bytes(13, "big"))
    lcorr = bb[-1]-34-52
    assert lcorr<0
    open(sys.argv[2], "wb").write(b"".join(outl)[:lcorr])
main()


Complete thread:

• Disgusted by FreeDOS 1.3RC installation CD - Laaca, 29.04.2021, 13:44
  • Disgusted by FreeDOS 1.3RC installation CD - RayeR, 29.04.2021, 16:17
  • Disgusted by FreeDOS 1.3RC installation CD - tkchia, 29.04.2021, 18:23
    • Disgusted by FreeDOS 1.3RC installation CD - RayeR, 29.04.2021, 18:53
      • Disgusted by FreeDOS 1.3RC installation CD - tkchia, 29.04.2021, 19:06
  • Disgusted by FreeDOS 1.3RC installation CD - Japheth, 29.04.2021, 18:44
  • Disgusted by FreeDOS 1.3RC installation CD - glennmcc, 29.04.2021, 19:15
    • Disgusted by FreeDOS 1.3RC installation CD - glennmcc, 29.04.2021, 20:26
      • Disgusted by FreeDOS 1.3RC installation CD - glennmcc, 29.04.2021, 20:43
        • Disgusted by FreeDOS 1.3RC installation CD - glennmcc, 29.04.2021, 21:14
          • Disgusted by FreeDOS 1.3RC installation CD - RayeR, 30.04.2021, 14:59
            • Disgusted by FreeDOS 1.3RC installation CD - mceric, 30.04.2021, 19:00
              • Disgusted by FreeDOS 1.3RC installation CD - Ringding, 01.05.2021, 18:23
                • Disgusted by FreeDOS 1.3RC installation CD - tkchia, 01.05.2021, 20:21
                  • Disgusted by FreeDOS 1.3RC installation CD - mceric, 02.05.2021, 00:16
                  • Disgusted by FreeDOS 1.3RC installation CD - Ringding, 03.05.2021, 17:22
                    • Disgusted by FreeDOS 1.3RC installation CD - Ringding, 03.05.2021, 20:36
              • Disgusted by FreeDOS 1.3RC installation CD - RayeR, 03.05.2021, 22:49
            • Disgusted by FreeDOS 1.3RC installation CD - glennmcc, 01.05.2021, 18:26
  • Disgusted by FreeDOS 1.3RC installation CD - Laaca, 29.04.2021, 23:04