keith
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!
Bought a HP 16700A logic analyzer
So I recently bought an HP 16700A Logic Analyzer which is a large mainframe type unit. It has (3) 16715A modules in it capable of a total of 200+ channels of logic analysis at up to 667mhz. I’m pretty happy with...
my mini-review of the IKALOGIC Scanalogic-2 PRO logic analyzer
As many of you know, I maintain a comparison page of sub$1000 logic analyzers here. I previously owned both a LogicPort and a Saleae Logic unit. I just received in the mail an IKALOGIC Scanalogic-2 PRO logic analyzer. ...
