There are several documents which may prove useful here:tofro wrote:
The SuperQBoard version 2 was apparently produced in a severely downgraded (crippled?) version only partially populated as the "SuperDisk" interface. I recall seeing some messages on the mailing list that indicated how to upgrade that version with the missing parts to the full one with mouse and memory.
Tobias
http://www.dilwyn.me.uk/docs/hardware/index.html
1. "Circuits". A selection of text files showing most of the pin out connections of the QL & SuperQboard.
2. "Interfaces Guide". An article from IQLR magazine by the late Denis Briggs, listing most of the early QL disk interfaces and other cards, complete with simple diagrams to aid identification. The diagrams are PIC files to go with the QL versions of the document.
3. "Keith Mitchell Hardware Documents". A series of ASCII files drawn up by Keith as he has serviced some QL add-ons over the years. All should be viewable on an 80 column screen as they are basically plain text files.
4. "SuperQBoard Modifications". A set of text documents from Keith Mitchell about upgrading a SuperQBoard interface: the mouse interface, PALs and ROM upgrade and piggy back memory upgrade
There's quite a lot of overlap in some of these documents, I suspect various files have been merged over the years.
Standby alert 