Here you will find firmware and technical data of Commodore's professional disk drives, equipped with the IEEE-488 interface, and of Commodore's professional line of computers, the PET.
Most of the disk drive information was supplied by William M. Levak <wlevak@umich.edu>.


6545-english.txt 2009-08-18 6256
6545-german.txt 2009-08-18 6410
Description of the MOS 6545 CRTC (Cathode Ray Tube Controller). The description in petio.txt is inaccurate.
PET8032rom.doc 2009-08-18 10647
PET 8032 ROM labels.
data-4 2009-08-18 130
labels-io 2009-08-18 389
labels-ram-4 2009-08-18 2336
mkdis4 2009-08-18 249
Files that can be used to produce a disassembly from the BASIC 4 ROMs.
petdis 2009-08-18 249715
A disassembly of the BASIC 4 ROMs.
petio.txt 2009-08-18 72934
Description of the I/O circuitry and the PET firmware. See also the 6545 description.
petram.txt 2009-08-18 12036
PET memory map
rom-1.hdr 2009-08-18 5988
Control file for recomment, used to generate rom-1.html.
rom-1.html 2009-08-18 373793
A disassembly of the PET 2001 ROM set.

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