From owner-pc532%daver@mips.com Tue Feb 27 06:18:27 1990 Flags: 000000000000 Reply-To: pc532@daver.bungi.com Date: Mon, 26 Feb 90 09:33:54 pst From: Bruce Culbertson To: pc532@daver.bungi.com Subject: Re: Sample SCSI driver code, anyone? Hello Jerry, > I've been looking at the full SCSI spec and trying to picture just what > hoops I'm going to have to jump through to implement it for the floppy In my Minix driver, I only use the SCSI commands READ, WRITE, and REQUEST SENSE. I really think for your (our) purposes, that should just about do it -- it certainly is enough to get started. I am sending along my SCSI driver. As you read it, you may sense the frustration I felt writing it. I found the both the 5380 and my 32203 DMA controller rather difficult to work with. The 5380, for example, has several "features" which are not mentioned in the documentation I have. Some control register bits can only be set when the 5380 is already in a certain state -- a fact that lead me to conclude my 5380 was busted until I bought another with the same problem. Anyway, you will see lots of debugging stuff in the code. Good luck, Bruce