Copy Link
Add to Bookmark
Report
Commodore 64: Firebird Tape loader
Two types are found so far, the only difference is thresholds.
T1 used on...
- Denarius
- Pitfall
- River Raid
- Zenji
T2 used on...
- Black Lamp
- Druid 2
- Sidewize
- Micro Rhythm
- Scary Monsters
------------------
T1 Threshold = tap byte $62 ($320 clock cycles)
Bit 0 : $44
Bit 1 : $7E
T2 Threshold = tap byte $52 ($29A ms)
Bit 0 : $45
Bit 1 : $65
Endianess : LSbF
Pilot byte : $02 (*254)
Sync : $52,$42.
Then...
2 bytes : Load Address (LSBF).
2 bytes : End Address (LSBF).
n bytes : Data
1 byte : XOR checksum of all n Data bytes.
