So all the SMT parts have been ordered for the prototype PCB. Once they come in, I’ll be testing the placement of the parts on top of a printed layout to see if the chips/parts match the layout — if there was a package screw up, and so on.
This board was never optimized for cost per se, but here’s what the major components cost:
SMT parts will be ordered soon. Once they arrive, I’ll double-check the pad design/placement is good, and then order the PCBs!
Everything is coming along swimmingly and I should have a prototype PCB in a few weeks.
So I’ve got a reasonable number of memory tests passing with the prototype solderless breadboard.
There are some minor issues that are mostly related to the stability:
So I’m starting to make some progress here, but I still have some troubles with my expansion board prototype.
For the first time, the initial exec-rom-based check passed, and the memory auto-configured. This happens occasionally on powerup.
Also, memtest is running a quick memory check and passing it with zero errors, but I really think it’s because it’s not doing a comprehensive test.
Troubleshooting is ongoing……….
With help from Ralf on this comment I was able to
Found a bad flip/flip replaced it, and now I’m on my way.
The amiga appears to be getting past the initial boot stages including the ram memory checks! I see the blue screen, and the disk drives starts loading workbench but crashes soon.
If anyone can tell me the exact meaning of this guru, that would really help me.
I’m pretty sure this means address error at that address, but that isn’t horribly helpful. I mean, does this mean a write failed, a read failed, something associated with that address, what?
This version is much better, much cleaner.
I also ordered some new wires that I hope will clean up the latch <—–>memory connections and amiga connector (CNX) to the protoboard.
Things are coming along……..
