unhd (Roger Gonzalez ) (05/25/90)
>From: ksh@vine.COM (Kent S. Harris) >Does anyone have any PD code for a pSOS SCSI manager and/or driver. >The driver chip will most likely be a NCR5380.... .. >Your thoughts and comments welcome and appreciated. I just finished a project to implement a standalone WORM file system, from the driver all the way up. It runs on both pSOS and Unix, with a few different #defines. I'm not sure if it would help, but the driver controls a NCR5380 on the system controller board over the VMEbus. Our application only uses one drive, so this driver *does not* support arbitration. It should be fairly simple to add. Basically, the driver is controlled by a simple state machine, and attempts to self correct errors by recursively calling itself with a request sense command. This driver is intended to be controlled by a single process, with disk access requests send to it by IPC. As an indication of the OS independence of the code, I even have most of the file system code (and driver as well) on a prom running with *no* operating system support (although how I handle alloc calls without an operating system would make your hair curl! Fortunately, these do not appear in the code until well above the driver level.) I'd be happy to send some/all of the code if you (or anyone else) are interested. System: Ironics P32, with IV3273 System controller board. Dev OS: System V Unix Targ OS: pSOS Drive: Maxtor RXT-800S SCSI: Version 1 -Roger -- UUCP: ..!uunet!unhd!rg | USPS: Marine Systems Engineering Laboratory BITNET: r_gonzalez at unhh | University of New Hampshire PHONE: (603) 862-4600 | Marine Programs Building FAX: (603) 862-4399 | Durham, NH 03824-3525