The Sinclair QL Forum

I published the pcb and EPM160S files at the hackaday.io site, https://hackaday.io/projects/hacker/357657

lliont wrote:I published the pcb and EPM160S files at the hackaday.io site, https://hackaday.io/projects/hacker/357657

Thanks I have downloaded all the files, I will see about making some PCBs...

lliont wrote:I published the pcb and EPM160S files at the hackaday.io site, https://hackaday.io/projects/hacker/357657

Although I have no personal need for a ZX8301 replacement, my greatest respect and appreciation for this excellent work!
Also for your QUBIDE clone, a very thoughtful and nice design as well.

Thank you Peter

Here a new pcb with the EPM7160STC100-10 that is smd and fits also in QL's with socketed rams.
It was difficult to solder it now that I'm older and can't see very well but finally I did it.
It gets hot, hotter than the PLCC84 cpld, I'll put a small flat heat-sink on it even I don't think it is necessary, now there is enough space.

Here

kudos to the soldering skills for that beast - was that done using a lot of flux and dragging a blob technique, as no one has an iron that small

Pr0f wrote:kudos to the soldering skills for that beast - was that done using a lot of flux and dragging a blob technique, as no one has an iron that small

I have a soldering iron this small but still prefer the drag technique Nice job anyway, I just wonder if it's normal that it would get this hot.

Don't know but it is a 5 volt small device with almost all its macro-cells used, clocked at 10 and 15Mhz (clocks derived from a 30Mhz active oscillator) and continually drives a lot of QL lines, maybe it is normal. It runs for hours with no problem so far with that small heatsink. You can touch the heatsink only for a couple of seconds.
Powered from an external ps when I was programing it not connected to the QL the whole circuit drew about 200ma. Do you think there is something wrong with the ic;

from datasheet:
Supply power (P) versus frequency (fMAX in MHz) for MAX 7000 devices is calculated with the following equation: P = P INT + PIO = ICCINT × VCC + P IO
The P IO value, which depends on the device output load characteristics and switching frequency, can be calculated using the guidelines given in
Application Note 74 (Evaluating Power for Altera Devices).

Yes I used something like the dragging a blob technique with lot of flux

The turbo bit option was in auto by default, I change it to off and the temperature dropped without affecting the operation!
Now it gets just warm but not hot.
This is cool!

Thank you Leon!

For the first time in QL history, we have a viable replacement for one of her core ULAs!

Truly, a magnificent accomplishment!