vagosgta3
RetroNuts!
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- 7 Ιαν 2008
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Ενα ωραιο threat που βρηκα για floppy mod στην Amiga
http://eab.abime.net/showthread.php?t=39042
Hi,
I've just returned from the workshop after a testing session, this time with a new adaptor board. This board allows you to plug a PC floppy drive into the Amiga with no modifications what so ever, to the drive.
I used a standard PC FDD cable, it is important that it does not have the twist in it that swaps A/B on the PC, unless you plug this adaptor into the untwisted part. My cable only had 1 connector and a twist, which I removed.
Whilst it works with 1.44 MB HD drives, when used with the Amiga they only work as 880K SD drives.
A few pictures of the prototype.
Top side view of the PCB.

Underside of PCB,I built the PCB 4 months ago but only got around to testing it today.

Connections to the PCB

The lower cable comes from the Amiga, the upper cable goes to the PC FDD. Power comes from an ATX PSU3.5" power connector.
Connected to a test drive

Finally, testing the drive by loading up Speedball 2
infoI tested the adaptor with 3 different drives, 1 was the Epson SMD-300 shown, the other two were brands I had never heard off.
All worked fine.
Testing comprised
* Booting Workbench 2.0
* Playing Speedball 2
* Playing F29 retaliator
* Spaceballs 9 fingers demo
* State of the Art Demo
* Copying and formatting of disks using D-Copy 3.1 and Workbench.
My next step is a few tweaks to the PCB then maybe make a few?
Who would be interested in an adaptor PCB?
Like my ATX adaptors, I need interest for about 25 units to make it viable and reasonably priced.
Any features you would like added to the PCB?
My current thoughts are
1) Jumper to counter act PC FDD cables with the twist (drive select crossover) in.
2) Additional 3.5" power connector or a flying lead to the new FDD, ideal for systems running from the stock PSU.
3) Bigger mounting holes for either sticky feet or another fixing
4) Fitting 34 way IDC plugs with polarity cut outs so that you can not insert the cables the wrong way around.
The schematics need a quick tidy up then I will put them online.
Ian
http://eab.abime.net/showthread.php?t=39042