Wow, a micro-SD card drive for Commodore PET computers! PETdisk is now on the market in kit form for $25 (not including shipping). PETdisk is made of two components, the primary board attaching to the IEEE-488 port on the PET and the secondary board attaching to the cassette port of the PET.
To read up on the PETdisk description, see videos on PETdisk, brush up on the user instructions, and peruse the assembly instructions, go to
http://www.bitfixer.com/bf/PETdisk
To read a brief discussion about the PETdisk, go to
http://www.commodore.ca/forum/viewtopic.php?f=1&t=2997
Received mine today,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
The PETdisk developer says "other users [report] that the PETdisk works on C64 and 128 with an IEEE-488 cartridge interface".
Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug