I'm happy to have a play around here.
I actually have two IIGS' I purchased the second to replace the one with the faulty clock chip, and then found it had its own problems ;-).
I must admit I don't full understand the relationship between the settings (pram?) store part of the chip and clock 1sec logic. When my IIGS was faulty The settings store continued to work but I could see no signals on the clock circuit (pins 1 or 2 or 3) - the IIGS was still happy to run.
With the tiny85 in place I get no clock pulse or settings being stored.
I've achieved my aim getting the IIGS working but I can see that other people have had similar issues (there is a specific error in the IIGS selftest that is clock related) - so I am more than happy to do some further testing/debugging here - I can purchase an Arduino if needed. That's if you have the time as well Phil.
In the meantime I will also try one of the other clock projects to see if SE aligned timing is better.
One final thing - I haven't ruled out that the issue is my inexperience with the tiny85's, I tried programming the the micronucleus Bootloader and use the USB adapter - but the tiny was still not recognised.
I actually have two IIGS' I purchased the second to replace the one with the faulty clock chip, and then found it had its own problems ;-).
I must admit I don't full understand the relationship between the settings (pram?) store part of the chip and clock 1sec logic. When my IIGS was faulty The settings store continued to work but I could see no signals on the clock circuit (pins 1 or 2 or 3) - the IIGS was still happy to run.
With the tiny85 in place I get no clock pulse or settings being stored.
I've achieved my aim getting the IIGS working but I can see that other people have had similar issues (there is a specific error in the IIGS selftest that is clock related) - so I am more than happy to do some further testing/debugging here - I can purchase an Arduino if needed. That's if you have the time as well Phil.
In the meantime I will also try one of the other clock projects to see if SE aligned timing is better.
One final thing - I haven't ruled out that the issue is my inexperience with the tiny85's, I tried programming the the micronucleus Bootloader and use the USB adapter - but the tiny was still not recognised.
Last edited: