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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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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...

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Oscilloscopes and Logic Analyzers

Corrosion near/underneath HP Logic Analyzer module plastic runners

The problem is corrosion….. Corrosion appears to be happening either directly under or nearby the various sized (but typically 5″ long) plastic runners that line the bottom of the large PCB modules. These...

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Oscilloscopes and Logic Analyzers

Effects of upgrading SCSI2SD from v5 (4.8.3) to v6 (6.2.1) analysis HP 16700A

If you compare this graph with the previous one in this post, there’s a few things you should notice: First, the overall boot is happening about 1 minute quicker, with a fully loaded chassis coming in around 2:35...

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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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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

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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Badge Computer

Fixed point number formats: might use 16.16

So for my fixed point number format for my 3D project, I’ve come up with a few possibilities : I think a 16.16 number format might work for me. This means I’ll represent the whole portion via one 68k word...

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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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inital results on error correction

Popular stories

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

Corrosion near/underneath HP Logic Analyzer module plastic runners

Effects of upgrading SCSI2SD from v5 (4.8.3) to v6 (6.2.1) analysis HP 16700A

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

Schematics now available for A501 replacement card

how the amiga reads floppies

Fixed point number formats: might use 16.16

Bug Katcher on Agnus