~NEW~ Sinclair QL Miracle Systems 768Kb Mini Trump Card

Sinclair QL Miracle Systems 768Kb Mini Trump Card
for the Sinclair QL

I am selling my own *new* revision of Alvaro Alea's QL MiniTrump 3. It comes with a flexible memory module (which you can manually configure) and a 256Kb solder-fixed module for a total of 896Kb (with your QL memory) when chained together. The board is running Miracle Systems V2.19 and TK2.26 additionally. Main differece is the jumper swicth to set memory support on off and ROM memory bank switch (so you can have two selectable roms). The board has been fully tested with two popular drive models (NEC FD1231H and MITSUMI D359M3) and altough it should be fine for most, be aware of compatibility problems as I simply could not test any other for obvious reasons :-) I have also successfully formated and did read and write onSONY and NASHUA disks both DS,HD and MF2 HD.

The left most memory module on the image is my own revision as well of Alvaro Alea's 512Kb Memory Expansion module. Main differece from the original project is that solder jumpers are replaced by pin jumpers and GAL is replace to PLCC counterpart making more space for the jumpers with good easy legends and also improving the routing by removing the through roles of the DIP gal (it has the same form factor as the original). The other memory module is the original run of the first revision, it works perfectly along the new revsion without problems. The pin jumpers are in range of the required current on the 5V rail, so it wont be a problem or put you QL at risk.

Feel free to ask any questions but be aware that I can only give very limited support, as I am not a store but a hobbyst as well like many of you.

The 7805 barely does any heat, but I havent tested with multiple drives at once as I only use one in my setup.

Lastly, WD1770 chip came from NOS batch I got.

(Projects will be eventually put on github when I finish my interactions)

** I ONLY SEND TO EU **
tracked and trace only.