AT&T 3B1 Unix PC

[Eric Smith]

Ethan Dicks wrote:
> Did anyone ever come out with a SCSI interface for these, even a home-brew
> one?

I wire-wrapped one, using a 5380 chip.  It wouldn't fit in the 3B1, so I 
had to put it in the expansion box.  I wrote a driver to test the 
hardware, which had ioctl() calls to read and write registers of the 
5380.  I didn't get a real block driver going, though.

The 99-pin connectors for the bus are really hard to find; I wonder 
whether AT&T or Convergent were trying to make it difficult for 
third-parties to build peripherals.  Possibly one could cut down a 
120-pin connector.  Maybe if the 3 pins at one end aren't necessary, one 
could butcher a 96-pin connector.

Eric