IEEE-488 a.k.a. HP-IB a.k.a. GP-IB is a parallel bus used in the
Commodore PET line of computers. For its home computers, Commodore
developed a very slow serial version of the bus.
Bill of materials and description of IEEE2IEC, an IEEE-488 to IEC
gateway based on the Atmel ATMega8515, to access IEEE-488 peripherals
on computers equipped with the Commodore serial bus, with or without
JiffyDOS.
This is the description of the IEEE488 interface published in the
German 64'er magazin a long time ago. It is basically modelled
after the 2031 schematics, the IEEE488 sister drive to the VC1541.
Code to patch the VC1541 ROM is provided. The original 2031 ROM
is different in both ROM chips, but the patch manages to get the
changes into one ROM chip only.