Programming

[Icelvlan88]

Should I be able to program the atmega88 soldered right on the board with the ISP pins? I've tried multiple times with 2 different programmers and have no luck.

I keep getting "chip enable program error" and "stk500_getsync()..."

Maybe I have a dead chip.

[Hojo-Norem]

That's what the ISP pins are for. I've had no problems with my cheap USBAsp clone with AVRDUDE. Your programmer should be supplying +5v and don't program while plugged into your C64. Depending on your programmer you may need to reduce the programming speed. The USBAsp and AVRDUDE at default speed is too fast for a fresh mega88. With my USBAsp I either need to enable its slow mode jumper or add the command '-B 8' to AVRDUDE's command line.

If one of your programmers has a socket that you can slot your mega88 directly then try that. That should prove if it's faulty or not.

[Icelvlan88]

I just tried that and still no luck. I just ordered a new atmega88pu to try another.

[Icelvlan88]

Do you have a 3D printable case? I saw some pictures online of some.

[Hojo-Norem]

I guess that it's possible to have a DOA chip. As for the case, I didn't design that.