ralphw@ius3.ius.cs.cmu.edu (Ralph Hyre) (11/17/88)
I can reccomend the Adaptec ACB-4000(A) reference manual that you can request with the board (which converts SCSI to ST-412/506 that those cheap PClone drives want. It describes EVERYTHING, and even has a source listing for an 8085 (I think) driver in back. On the disk side, there are easily-interfacable custom chips, like the NCR 5380, which has CMOS and high-performance variants. There are lots of things to worry about when building a SCSI interface, although if you only plan to attach a single drive to a single computer then you can probably not worry about arbitration and other stuff. These days, I'd go and build a PClone backplane interface and buy the cheap cards for it. (For example, I think I saw a $49 SCSI interface in some random magazine the other day.) As always, be careful about TERMPWR, this is where some SCSI devices 'miss' obeying the SPEC. Good luck. -- - Ralph W. Hyre, Jr. Internet: ralphw@ius3.cs.cmu.edu Phone:(412) CMU-BUGS Amateur Packet Radio: N3FGW@W2XO, or c/o W3VC, CMU Radio Club, Pittsburgh, PA "You can do what you want with my computer, but leave me alone!8-)" --