Commodore 64: Unil ODE loader

@DrWatson

Published in 

C64 tape formats

 · 3 years ago

ODEload

Used in

• Pipe Mania (Empire)
• Better Dead than Alien (Electra)

and probably in

• Block Busters (TV Games)

First character in CBM filename is: ">" (0x3E)
CBM Data CRC32: $D5961DB0

 Threshold: $1B0 clock cycles (Tap value: $36) 
 Bit 0: $25 
 Bit 1: $50 
 Endianess: MSbF 

 Pilot byte: $20 (x64) 
 Sync Byte: $DB 
 

Header

• 2 bytes: Load address (Low/High)
• 2 bytes: End address (Low/High)

Data

1 byte: XOR checksum of Data

Trailer
a longer pulse

Note
the first TURBO file contains a copy of this loader (load address may vary) and the string with loader's name which is sometimes shown during load (not in PipeMania):

 05 0E 28 6F 64 65 4C 4F 41 44 20 31 39 38 39 29 "..(odeLOAD 1989)"