On 7/9/20 7:02 PM, Robert Armstrong via cctech wrote:
I have an 11/04 with an RK11-D. I have a couple of RK05s, but I
wanted to test the controller before I start working on the drives.
The PDP11 Diagnostic Handbook says that ZRKJ?? "checks only the
drive-independent logic of the RK11 contr
I have an 11/04 with an RK11-D. I have a couple of RK05s, but I
wanted to test the controller before I start working on the drives. The
PDP11 Diagnostic Handbook says that ZRKJ?? "checks only the
drive-independent logic of the RK11 controller. no drive is needed..."
I assumed that meant it
The error signal was wire-or'ed through up to four drives, so it must be
terminated somewhere - IIRC there was a Unibus terminator in the last
drive, but it has been 45 years since I worked on them, the little grey
cells are fading _\:-)
cheers, Nigel
Nigel Johnson, MSc., MIEEE, VE3ID/G4AJQ/VA3MC
> On Jul 9, 2020, at 5:02 PM, Robert Armstrong via cctech
> wrote:
> I have an 11/04 with an RK11-D. I have a couple of RK05s, but I wanted to
> test the controller before I start working on the drives. The PDP11
> Diagnostic Handbook says that ZRKJ?? "checks only the drive-independent logi
