The Sinclair QL Forum

who knows something about this ql backplane ;

Its the tetroid one isnt it?

I think I remember seeing those on German ebay a year or 2 ago. Not sure who originally made them though.

XorA wrote: ↑Sun May 21, 2023 7:40 pm Its the tetroid one isnt it?

I think the Tetroid ones all have clear maker markings, like this.

thank you for answering ,
it looks like an evolution of the tetroid backplane ( earlier ? )

now to find some technical background on it ( and the chips needed to give it 512k )

Probably an AS6C4008 512k RAM chip and some sort of programmed GAL.... and the hardest part might be finding the file to program the GAL.

firstly try to find the person who is making these ......

maybe he is willing to share

M.K. if all is right with the world would be Marcel Kilgus.

Dave wrote: ↑Tue May 23, 2023 6:19 pm M.K. if all is right with the world would be Marcel Kilgus.

Nothing to hear from him....for a long time.

https://www.kleinanzeigen.de/s-anzeige/ ... 4-225-1739

Anyone recognise the address?