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Home Forums 68kMLA IBM 1.44M <-> Mac 400k/800k/1.44M or SCSI Hack? — #12
Post #12 by Bunsen
Source Forum68kMLA
CategoryHardware
Post DateSun, 16 Dec 2012 - 17:37
Original URLhttps://68kmla.org/bb/threads/ibm-1-44m-lt-gt-mac-400k-800k-1-44m-or-scsi-hack.26825/
Post
Trash80, you can't just wave the words "microcontroller and/or FPGA" around like they can magically solve anything you throw at them. There are a billion and one different ICs that fall under those two categories, and their capabilities vary enormously. Someone has to spec it, design it, build it and code it - and in the case of a production unit, budget it.

This item will have the bare minumum IC required for the task it is designed and budgeted for. I used the words "completely unrelated" because this item is a floppy emulator. If you want to talk about this item, then it has nothing to offer us towards a SCSI solution.

It sure would be nice to go from USB to SCSI bi-directionally
Sure it would.

by hacking this production hack.
Total dead-end, waste of time, talking out your uhoh hat, barking up the wrong tree altogether. Not. Going. To. Happen.

The FDD Emulator and MicroController based SCSI or Mac FDD Adapter for that Emulator
So, you want a micro to convert from SCSI to PC floppy so you can talk to this emulator's micro to USB...

WHY. WHAT DOES THIS EMULATOR BRING TO THE PARTY WHEN YOU HAVE A MICRO OF YOUR OWN CHOOSING RIGHT. THERE. Let alone the triple backflip of data format conversions you're talking about, and choking the SCSI bandwidth down through the incredibly slow floppy bottleneck to reach a fast USB device on the other end.

Whatever you're smoking, I hope you brought enough for the whole class.

There are two useful things that could happen. They are totally unrelated in every conceivable way. I cannot emphasise that enough.

  • Hack this device's inbuilt micro to connect to the Mac floppy interface, with hopefully nothing more than some electrical conversion on the back end. ** NB MAY NOT BE POSSIBLE
  • Build a direct, full-speed SCSI-USB interface from scratch.

mp.ls