Activision tape
---------------
By Luigi Di Fraia
Used in Activision releases ("Ghostbusters", "Hacker", "On Court Tennis" and probably many others).
After CBM files (DATA size: bytes, CRC32: $8E027BD2) there's another CBM Data block containing the loader. It checks for autostarting cartridges (eg. SIMON's BASIC) and disk drives. If any is found, usually load doesn't end successfully.
Turbo blocks:
Threshold: $0118 (280) microseconds (TAP value: $22)
Bit 0 pulse: $1F (very close to threshold)
Bit 1 pulse: $31
Endianess: MSbF
Leader: Bit 1 pulses (no less than x256, typically x2048 about) with last one being bit 0
Sync byte: $33
Header: Load address (low/high bytes)
End Address-1 (low/high bytes) (add 1 to this to get end address)
Data
1 byte: XOR checksum of all data bytes
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