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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

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16700A internals w/ SCSI2SD v3.0 installed

See my fan upgrade post here on quieting those noisy fans.
See my DIY logic analyzer cart here.
Here’s a couple closeups of the SCSI2SD in action:

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Oscilloscopes and Logic Analyzers

HP 16700A boot times and optimization

I’ve been playing with my HP 16700A Logic Analyzer and looking at boot times. Originally the HP 16700A came with an internal SCSI drive, which was still functioning after 15 or 16 years. This SCSI drive was a 4GB...

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Commodore Amiga Related

On building an A500++

Commodore Amiga 500 Plus In the 1980s, Commodore made a newer version of their very popular Amiga 500, called the Amiga 500 Plus. It added a few things, namely newer versions of Kickstart and Workbench — both 2...

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Reading Amiga Kickstart ROMs with a TL866A reader

I recently bought a TL866A from ebay with a bunch of adapters for a little under $100 shipped. Seems like a decent programmer except for the fact that it doesn’t support the 27C200/27C400 mask ROMs that hold...

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$28 Gonbes GBS8200 Scandoubler for use with Commodore Amiga

While I probably would have preferred to order an Indivision ECS scan doubler, a really nice alternative is a Gonbes GBS8200 video converter off of ebay. I had bought version 2.0 sometime in 2010 or 2011, and could not...

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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...

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Amiga Floppy

Samsung SFD-321B 3.5″ floppy drive and specifications

I plan to create a separate section for these type of documents, but I wanted to get this online for now. I purchased the Samsung (made by SEMA, the division split off of Samsung that mostly makes floppy drives) SFD...

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Amiga Floppy

how the amiga reads floppies

So I’ve forever wondered, at the hardware level, how the amiga reads floppy disks. I’ve gotten bits and pieces over the years, but I’ve never really understood the bulk of it. So there are four main...

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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...

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A501 Replacement Inactive

Schematics now available for A501 replacement card

Schematics now available for A501 replacement card!
Find them on the main project page, located here.

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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...

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Badge Computer

Watching YM2612 communication on Sega Genesis

I did buy a compatible 24-pin DIP clip to make it a little easier, and a little bit more reliable, to hook up the logic analyzer. The YM2612 sits on the Z80 Bus, and so there’s lots of communication not intended...

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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...

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inital results on error correction

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16700A internals w/ SCSI2SD v3.0 installed

HP 16700A boot times and optimization

Popular galleries

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Latest articles

Reading Amiga Kickstart ROMs with a TL866A reader

$28 Gonbes GBS8200 Scandoubler for use with Commodore Amiga

floppy.c’s mfm decoder

Samsung SFD-321B 3.5″ floppy drive and specifications

how the amiga reads floppies

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

Schematics now available for A501 replacement card

Bug Katcher on Agnus

Watching YM2612 communication on Sega Genesis

Learning the YM2612 with a Sega Genesis Model 1