Intro If you’re into retro computing, you probably know the Commodore Amiga 500—a beloved classic with surprisingly capable hardware for its time. But like many vintage systems, the original power supply is often...
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Building a replacement Amiga 500 power supply
Intro If you’re into retro computing, you probably know the Commodore Amiga 500—a beloved classic with surprisingly capable hardware for its time. But like many vintage systems, the original power supply is often...
Validating my dataflyer BUSS PAL replacement GAL
As some of you that have been following my reverse engineering efforts over the last few years, one of the tasks I took on was reverse engineering the BUSS PAL TIBPAL16L8-25 present in on the Expansion Systems Dataflyer...
Recapping a Samsung 204B monitor
In September 2006, I bought a Samsung 204B SyncMaster monitor for $320 plus tax. It was a 4:3 monitor, ideal for specific tasks like my Logic Analyzer Cart. In July 2024, the monitor stopped working and wouldn’t power...
Amiga QB Extract recently updated
There was a HDD backup utility for the Commodore Amiga called Quarterback, part of a suite of tools called Quarterback Tools. This utility allowed you to backup existing files on your HDD, compress and/or encrypt them...
Couple hi-res images of 16902A mainboard
I just recently added another HP/Agilent logic analyzer to my collection. This time it is the 16902A. I needed to remove the CPU tray to replace the IDE HDD with a SATA SSD. As a result, I figured I’d take couple...
Agilent Logic Analyzer cable teardown photos
So for today ladies and gentlemen, I present a teardown of an HP/Agilent logic analyzer cable. I think this is part number 16715-61601. This cable is used to connect one of a series of 40-pin compatible modules (many of...
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Building a replacement Amiga 500 power supply
Intro If you’re into retro computing, you probably know the Commodore Amiga 500—a beloved classic with surprisingly capable hardware for its time. But like many vintage systems, the original power supply is often...
Validating my dataflyer BUSS PAL replacement GAL
As some of you that have been following my reverse engineering efforts over the last few years, one of the tasks I took on was reverse engineering the BUSS PAL TIBPAL16L8-25 present in on the Expansion Systems Dataflyer...
Recapping a Samsung 204B monitor
In September 2006, I bought a Samsung 204B SyncMaster monitor for $320 plus tax. It was a 4:3 monitor, ideal for specific tasks like my Logic Analyzer Cart. In July 2024, the monitor stopped working and wouldn’t power...
Amiga QB Extract recently updated
There was a HDD backup utility for the Commodore Amiga called Quarterback, part of a suite of tools called Quarterback Tools. This utility allowed you to backup existing files on your HDD, compress and/or encrypt them...
Couple hi-res images of 16902A mainboard
I just recently added another HP/Agilent logic analyzer to my collection. This time it is the 16902A. I needed to remove the CPU tray to replace the IDE HDD with a SATA SSD. As a result, I figured I’d take couple...
Agilent Logic Analyzer cable teardown photos
So for today ladies and gentlemen, I present a teardown of an HP/Agilent logic analyzer cable. I think this is part number 16715-61601. This cable is used to connect one of a series of 40-pin compatible modules (many of...
Creating a timeline of events
It’s often useful when trying to understand, debug, or reverse engineer a system to put together a timeline of operation from beginning to end. The result is a series of events where something happens first, then...
Identify PAL inputs and outputs
In order to properly reverse engineer a PAL, you need to correctly identify which pins are inputs, and which pins are outputs. This in some cases is trivial because some of the PAL’s pin functions are fixed...
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