exodus@mfgfoc.UUCP (Greg Onufer) (08/25/88)
From article <226@greens.UUCP>, by matthew@sunpix.UUCP ( Sun NCAA): > I'm considering a project to build a Hard disk interface for a computer > that normally doesn't have the capablity to interface to one. What I'm looking > for is a good source of info on actually building a disk controller for > any (or preferably all) of the following hard disk interfacing protocols > > SCSI, ESDI, ST506, ST412, SMD Well.... the first step would be a Computer Interface. This could easily be done with National Semiconductor's DP8490 SCSI controller CHIP (yep... singular, line drivers and all...). That in turn could connect to an Adaptec 4000 (SCSI-> ST506) or directly to a native SCSI drive. The SCSI bus is beneficial in that 1/4" tape drives are also easy to connect. The Adaptec 4070 (?) (SCSI-> ST506 RLL) would also be a good choice if you can get a hard drive that works with it! You can also buy SCSI-> nearly anything boards (not all the same board!). Of course, a SCSI-> ESDI adapter will not be as fast as a direct ESDI interface, but at least it's flexible. --Greg