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: Sometimes my memory board steps on the built...
Archive - 2013
Sometimes the amiga recognizies my ram board, some very basic memory tests are passing
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...
Testing shows databit 10 is always stuck high on commodore amiga expansion
With help from Ralf on this comment I was able to Disable the memory by no-longer grounding PIN 32, and sometimes forcing CE high on the SRAM chip. Boot a workbench disk, and then break it on startup. Insert a disk...
Amiga Guru Meditation number 00000003.00C06560
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...
Ended up destroying the v1 prototype, too many damn wires
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...
Finished wiring of the prototype, hooked it up
So I finished cabling up the solderless breadboard, and after checking connections, and checking pwr and gnd, I plugged it into the amiga. The amiga boots, which is a good sign, but then it never recognizes the memory. ...
first night wiring progress
Now I remember why I like FPGAs so much, no freakin’ wiring!@!# Here’s a start to what the monster looks like. I think I’ll like the PCB form factor a little better. 🙂 I thought a little bit about how...
ISSI memory chip mounted
So I can’t believe how freakin’ tiny those pins are coming off the memory chip. The pads on the surfboard were huge by comparison. I actually thought there was a manufacturing defect on the memory chip and...