Home > Browse Our Collection > Software > Commodore PET > Disk-O-Pro

Disk-O-Pro is a ROM chip which plugs into your PET/CBM. It is intended to be used with upgrade ROM to produce a system that can recognise a whole library of new commands.

It is designed to fit into a PET without conflicting with other upgrades.

This means users can use the new commands without having to abandon existing program tools that the user has purchased. However, compatibility was not 100%...

Platform : Commodore PET
Format : ROM chip
Publisher : Calco Software
Authors : Robin Chang, Skyles Electric Works
Date : 1981
Product Code :

Other Software by Calco Software:

Item Manufacturer Platform Format Date
Disk-O-Pro Calco Software Commodore PET ROM chip 1981

Information About Calco Software:




This exhibit has a reference ID of CH68603. Please quote this reference ID in any communication with the Centre for Computing History.
  Disk-O-Pro Click on the Images
For Detail

Help support the museum by buying from the museum shop

View all items

Founding Sponsors
redgate Google ARM Real VNC Microsoft Research
Heritage Lottery Funded
Heritage Lottery Fund
Accredited Museum