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Forums > C64 Coding > Disk I/O secondary address meaning.
2012-06-29 07:21
Flavioweb

Registered: Nov 2011
Posts: 463		 Disk I/O secondary address meaning.

I see some sources like
LDA #$6F ;$60 + COMMAND CHANNEL $F
JSR TKSA

but i can't figure out what the $6f value really means.
Someone can give me infos on how secondary addresses works?
2012-06-29 07:26
tlr

Registered: Sep 2003
Posts: 1790		 Some info about the IEC protocol here: http://jderogee.tripod.com/project1541_downloads/IEC_1541_info...
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