The Sinclair QL Forum

Hello again! I populated the CST Ram Plus card and i have some questions. I used 2N2222A instead of MPS2369. Both are NPN transistors and from the datasheets they seem to be interchangeable? Second, at the block diagram the lower right resistor is a 47KΩ or a 4.7KΩ resistor? And final, all eproms ar...

HI to all! Recently i purchased a 512KB CST Rom Plus card. I want to ask which eprom programs i can burn to populate the four empty rom sockets. CST_Ram_Plus.jpg CST_ram_Plus (2).jpg Secondly, i assemble a CST QDISC v4 floppy disc controller, but it is not recognized on boot screen(green letters on ...

Hello everyone! Is by any chance available the PAL16R4ACN file, which is found on a Sandy Q board 512K RAM doughterboard?

Dave wrote:Yes. Sometimes, shocks can travel from the unprotected RGB socket directly to the 8301 and blow an output.

5.6V zeners to ground from all five lines would be prudent, if you're comfortable to retrofit them.

wouldn't be better to use 5.1V zener diodes?

Completed. A great game! Thank you!

dilwyn wrote:And for your QL's hairdressing needs, visit Llandudno...
(this is on Facebook so not everyone might be able or wish to see the page)

https://www.facebook.com/QDosSalon/

Maybe there is a problem with the Thor psu and the output voltages it produces.

Take a look at the HT part (including the HT transformer) of the pcb. Maybe there is a desoldered part.

Outsoft wrote:...or think like in Italy that when we vote and won a referendum...the governamente make the opposite...

that is also an issue in Greece! People vote and the government do the opposite! Do you remember last year's referendum here in Greece?

or maybe a Commodore 1083s, like the one i use!