Sony MPF520-1/04 PC FDD to Amiga conversion

The external floppy drive that I was using with my CDTV died and replacements were a little expensive (ok, they weren’t that bad but I was impatient).  So I figured, how different could an Amiga FDD be from a PC one?

Turns out there are a couple of differences, the signals on pin 2 and pin 34 are reversed (Density Select, Ready Change) and the drive needs to identify as DS0 if it’s the internal drive on a normal Amiga or the external drive on the CDTV (PC drives don’t because they’re generally picked up using cable select).

How this works will vary depending on your drive, but for my Sony model it was very simple.  It requires two wires, two track cuts and a jumper change.

Basically we need to cut the connection that pins 2 and 34 are on, and then put a wire from 2 to a solder point that was pin 34‘s original destination and between 34 and a solder point that was pin 2‘s original destination.

You should be able to work out where they are from the pictures, be careful when cutting to only cut the one track and don’t cut yourself.

If you want to revert the drive you can just run a wire between the pins and their original solder points.

The jumper is at the back of the drive, next to the motor.  If it’s on 0 and 1 (nearest the motor) then it’s set to be DS0, if it’s on 1 and 2 then it’s DS1.  If you want it to be internal on an Amiga or external on a CDTV then it needs to be DS0, if you want it external on an Amiga then set it to DS1.

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CDTV / CD32 Resources

Notes:

When creating a bootable iso for CDTV or CD32 do NOT edit the Startup-Sequence file outside of the Amiga environment.  You will add extra characters to the end of lines that will cause it to fail.  You can use an emulator to edit it.

If you are creating an iso for the CDTV then you need to call RMTM at the top of the Startup-Sequence to remove the CDTV trademark.  This isn’t required for CD32 but it won’t cause problems if it’s there.

the CD32.tm and CDTV.tm files are needed (if you want to make a cd for both then use CDTV.tm).  This file is selected in the options for ISOCD.

If you want to create a bootable Workbench CD then just create a hard drive folder in UAE and copy the Workbench files across (or install it for later versions).  You can then use this drive as the source for ISOCD.

If you want to create a bootable game then you’ll need to install it using WHDLoad.

Description Device Download
ISOCD, run on an Amiga device (or emulator) to create a bootable iso CD32 / CDTV ZIP
Basic Workbench 1.3 CD CD32 / CDTV (requires mouse) CD32 / CDTV ISO
Convert Sony MPF520-1/04 to Amiga Amiga / CDTV Instructions

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Commodore CDTV

Commodore CDTV

4th Generation Competitors
PC Engine Megadrive Super NES Neo Geo AES Neo Geo CD Philips CDI NEC SuperGrafx
Region Release Date Discontinued Lifetime Sales
Japan NA  NA  NA
North America Mar 1991 1993
Europe Mar 1991 1993

Commodore’s second attempt at taking the living room.  Unfortunately, despite the fact that this was based on the Amiga 500, a machine well known for it’s games, they did not position this as a console.  Instead the CDTV was advertised as an educational system.

The CDTV was also incredibly expensive, especially when compared to other consoles at the time.  The CD Rom drive was a very early model and, as well as being slow, needed a caddy to play discs.

The price meant that potential buyers would buy Nintendo or Sega instead and because of poor sales there was little support from developers.  This was especially galling considering how easy it was to port software from the A500.

The CDTV had extensive upgrade options available.  As well as all the bits needed to make it into a fully fledged Amiga (Keyboard, Mouse and Floppy Drive) there were several memory upgrade options and even upgrades for video.  By default the CDTV outputs to RGB or Composite, but there were options that added RF / RCA and Scart.

It was even possible to add genlock options, meaning the CDTV could be used for one of the Amiga’s strengths, video editing.

At the end it was too expensive and was aimed at a market that had already failed with the Philips CDI.  Considering how powerful the Amiga hardware was this was a poor result by Commodore.

All of these errors were fixed in the CDTVs successor, the CD32.

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