keith
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...
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...
Let the fun begin!@#!@#
Everything has arrived! I think the first order of business is soldering this darn memory chip…. Not sure how hard this is going to be, but I’m going to give it a shot!@#
Parts ordered for the A501 replacement card
I placed an order yesterday for some prototyping parts to get this project off the ground. Some of the key parts are: ISSI 256kx16 SRAM chips. IC SRAM 4MBIT 25NS 44TSOP A surfboard to do 44-pin TSOP II to DIP. Wish me...
Converting Rigol DS1102D Logic Analyzer .csv files to OLS data file format using Linux
How to convert .csv files exported from a Rigol DS1102D MSO to OLS data file format. So I own a Rigol DS1102D 100mhz MSO which has two-channels of analog and 16 channels of logic analysis through the active logic head...
Amiga 500 A501 RAS/CAS dynamic ram timing
So I found myself looking at the dynamic ram timing with a logic analyzer attached to an Amiga 500. I’m still learning all of this stuff, and after about 45 minutes, I gave up thinking that I was either too tired...
Replacing HP 16700A Logic Analyzer’s Panaflo loud fan with new Noctua fans
Goal: Replace the loud 45dbA Panaflo side panel fan on an HP 16700A Logic Analyzer with two new Noctua fans. While I love my HP 16700A Logic Analyzer for a multitude of reasons, it sounded like a jet engine when it was...
my minimig with 4mb upgrade and ARM controller
Finally got some time to play with minimig!
Of course there’s a great community at .
Bug Katcher on Agnus
I swear I already posted about this but heck if I can find the post. Anyways, here’s a photo of a bug katcher installed on Agnus on a Commodore Amiga 500. This gives me the ability to attach a logic analyzer to...
EEVBLOG does a video teardown on the Amiga 500!
Dave just posted this! I’m so glad to see him take this on!
