Home example 2

Amiga Floppy

inital results on error correction

While I have yet to actually implement the full-scale error correction as I want to, I did some manual tests today. I basically took a track that I was erroring out on, and swapped in 1-bit away values for the bad bytes. In some cases, it appeared...

keith

4 comments

Latest articles

Amiga Floppy

floppy.c’s mfm decoder

A couple days ago, whenever I got ahold of floppy.c, I wrote a quickie code stub that utilizes floppySectorMfmDecode from floppy.c of fellow (). Note you must use the mirrors to actually download anything…. This...

1,952 views

Oscilloscopes and Logic Analyzers

How to mount HPUX 10.20 VxFS logical volumes in a modern linux environment

This is a problem that I’ve wanted to tackle for quite some time. Since I’m using SCSI2SD and also messing around with a few different logic analyzers, I’ve got several HDD images that include both...

1,670 views

Oscilloscopes and Logic Analyzers

Setting up a SCSI2SD on HP 167xxA for CDROM and HDD targets

This quick guide contains instructions on how to setup, configure, burn, and launch an install from a SCSI2SD when inserted into an HP/Agilent Logic Analyzer on the 16700 series. A fresh install is always recommended...

1,666 views

Uncategorized

Trying to use mini-box picoPSU-120 to power Amiga but -12v rail is out of ATX compliance

So I purchased a mini-box picoPSU-120 kit which is in essence a very very small power supply that provides multiple regulated voltages. I want to power my Commodore Amiga 500 with the tiny power supply but there’s...

1,624 views

PAL REing

Why simply “dumping” a PAL isn’t always possible?

Contents Rom Dumping Dumping ROMs is a pretty common practice in the space of reverse engineering, and many eeprom readers are cheap, easily available, and there’s really not much to them. Plunk your ROM chip in...

1,592 views

Amiga Floppy

logic analyzer on Amiga 500 Paula chip

So I’ve attached my Intronix LA1034 to the Paula chip, the 16-bit wide data bus, and the DMA Request line. I triggered the logic analyzer on 0x4489, of course. Here’s the results: (click for a full size...

1,584 views

Amiga Floppy Amiga-VSC Inactive

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...

1,571 views

Oscilloscopes and Logic Analyzers

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...

1,550 views

Uncategorized

OT: Century III Mall, not quite a dead mall, but sure heading that way

Century III Mall is an ailing enclosed shopping mall located in the southern Pittsburgh suburb of West Mifflin, Pennsylvania. I lived nearby this mall, and this was definitely “our” mall for kids like me...

1,535 views

Badge Computer

Learning the YM2612 with a Sega Genesis Model 1

I’m planning on using the Yamaha YM2612 FM synthesizer chip that has been used in both keyboard synthesizers, but also in the Sega Genesis consoles. The purpose is to add audio capability to my DIY Tablet computer...

1,513 views