Commodore 64: Double Dragon Loader loader

@DrWatson

Published in 

C64 tape formats

 · 27 May 2021

Double Dragon loader: used by Double Dragon (1, not 2 or 3), very similar to Empire loader, it only differs for a block ID in the header

Double Dragon Loader

info by Fabrizio Gennari <fabrizio.ge@tiscalinet.it>

Used by Double Dragon

Encoding :

Threshold : 360 clock cycles

Data Endianess : MOST Significant bit First

Lead-In Byte : $80
Sync Byte : $40

Structure :

After sync byte, the following information is given :

• 00 Block number (identifies the block)
• 01-02 Start Address of data (Low, High byte)
• 03-04 End Address of data (Low, High byte)
• 05 DATA

No checksum