The Sinclair QL Forum

Because of that system and CPU clock may be different from 24 MHz. Have you tried any other clock speeds? What worked? I tried several clock generator. 25 MHz - works 32 MHz - started and crashed after several seconds. 20 MHz - works 16 MHz - started but dont work properly, have video issues in HiR...

kordics wrote:I have just purchased one! Now, I have to choose a colour...

Thank you.

I notice the blue SGC has a slightly different layout to the red and black ones. Is it an earlier or later revision? What caused the change? The blue board - experimental. The differences: 2 clock : 24 MHz oscillator for floppy disk controller and other - system clock generator. Because of that sys...

Got several EP1810 chips.

https://www.sellmyretro.com/offer/details/32756

Dave wrote:I'll keep my eyes open for you.

Thank you.

For use the modern CPLDs we need to redesigned all SGC. At first I was hoping to make the map as close as possible to the original. Tetroid, I probably will not understand the answer to this question, but, If the package is the same, and the functionality can be reproduced, why would all of the SGC...

Tetroxide, Are there any more modern CPLDs / FPGAs that can be used in place of the EP1810? Having asked that I would like to thank you for all of the, obviously, hard work that you have put in designing and developing your QL accessories. You have produced wonders with very limited resources. Whop...

Dave wrote:

tetroid wrote:I think is possible on USA only , but I have no access to US warehouses.

I am based in the US. If I can find or order parts for you on your behalf, let me know.

Thank you , Dave.
I would be grateful if this happened.
I need EP1810LC-20(T) or LC-25(T) , date code from 1990 to 1995.

Peter wrote:Hi Tetroid,

thanks for your comments. Do you think it would be realistic to replace the PLD by a new one like the Lattice LC4128 or LC4256?

Peter

Yes, I think this is possible.

Thank you. I am think not real to make the new batch of this clone. I am sorry, I cant find the original NORMAL old date code EP1810. I tryed to buy several EP1810 parts - all parts from China / Taiwan is fake - refurbished ( remarked from new date code ) or programmed. I have no chance to find the ...