>>There are some things you can try. Firstly (if you have the programming >>info - if not I'll find it), you can try transfering 256 bytes from the >>PDP11 to the sector buffer and then transfering it back again (without >>going via the disk). This will test most of the controller logic and the >>sector buffer RAM. My guess is that this will fail.

>> -----Original Message----- >> From: steve.lubbers(a)barco.com [mailto:steve.lubbers@barco.com] >> Sent: Tuesday, August 03, 1999 8:51 AM >> To: Discussion re-collecting of classic computers >> Subject: RX02 Repair >> >> >> I've been trying to bring my old RX02 drive back to life, >> with little >> success. >> >> I just received a good bootable floppy, and get the same >> results as with all >> my old disks, so now I'm looking for hardware problems. >> >> On a PDP-11/03, With RXV21 controller, and an RX02 drive, the RX02 >> initializes, attempts to read the boot block, and crashes >> to ODT at 000600. >> >> >> > In examining what my system reads as it attempts to boot, >> it looks like I >> > read every other 128 byte chunk correctly. I haven't >> figured out a >> pattern >> > to the corrupt sections. >> >> >> Does anyone have any RX02 diagnostics, or hardware trouble >> shooting tips? >> >> >> Steve >> >>