68kMLA Classic Interface
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| Click here to select a new forum. | | RaSCSI without ICs? | Posted by: tanuki65 on 2019-01-23 12:03:24
So I'd really like to make this project, but I don't have the ICs they use.
Would it be OK if I just direct wired it?
Also, wiring stuff/pinouts is not my strong suit. I might have more questions about wiring later.
Thanks in advance!
| Posted by: Gorgonops on 2019-01-23 13:48:35
No, I don't think so. The GPIO pins on the Raspberry PI are not spec'ed to be 5v tolerant so it's a pretty sure thing you'll smoke it without the buffers. (I dunno, maybe for the pins that are only inputs or outputs you could get by with some current-limiting resistors if the 3.3v output swing of from the Pi turns out to be enough to work the inputs on the SCSI bus side, but the bidirectional data pins realistically need to have some voltage shifting buffers in front of them.)
The buffers aren't exactly an exotic part, you should be able to buy them.
| Posted by: MrGasS27 on 2019-02-05 11:41:18
I used RaSCSI with my Macs with a Pi 3 and Zero W, every time with a direct wiring, but honestly it doesn't work so good.
My Macs and their SCSI controllers are still alive.
| Posted by: Michael_b on 2019-03-04 19:41:47
I used RaSCSI with my Macs with a Pi 3 and Zero W, every time with a direct wiring, but honestly it doesn't work so good.
My Macs and their SCSI controllers are still alive. Were you able to make it work with 68030 Macs?
| Posted by: MrGasS27 on 2019-03-28 11:26:15
Were you able to make it work with 68030 Macs? Nope, I tested it with a IIci and a IIsi, nothing work...
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