RX02 Difficulties

[Aaron Jackson]

Well, would you believe it. It was the disks after all. I can't believe
they are all bad!

Just booted straight into RT-11.

Thanks all for your help anyway. Time to play.

Aaron.



Aaron Jackson via cctalk writes:

> Hi everyone,
>
> I originally posted this on VCFed (which was new to me) but the
> moderation queue has had me waiting for about 3 days, so I thought I'd
> ask here as well, the usual of gurus. :)
>
> I was recently sent an RXV21 controller so I could test out my RX02
> drive. When I power up the PDP-11 or reset the machine I get the nice
> clunking sound which I have been told is normal. I expect I wouldn't
> hear this if the ribbon cable was in the wrong way.
>
> To test, I tried to use VTserver to dump the contents of a disk, but it
> immediately threw an error. I soon realised there are two DIP switches
> on the logic board of the RX02 drive which had to be adjusted to work
> with the RXV21. So, I had some progress. Output of VTserver almost
> looked promising but then it hangs, as below:
>
> ]] Tape record n from device xx is written as xx(0,0,n)
> ]] Disk drive xx is written as xx(0,0,0)
> ]]
> ]] Enter name of input record/device: rx(0,0,0)
> ]] Enter name of output record/device: vt(0,0,1)
> ]]
> ]] Opened copy.out read-write
> ]]
>
> So, following some advice I booted via TU58em into XXDP and ran the
> diagnostics:
>
> ]] DR>STA
> ]]
> ]] CHANGE HW (L)  ? N
> ]]
> ]] CHANGE SW (L)  ? N
> ]]
> ]] CZRXFB0 SYS FTL ERR  00040 ON UNIT 00 TST 011 SUB 000 PC: 003476
> ]]  CSR BITS - LGC TST
> ]]   AC LOW FATAL ERROR
> ]]       REG ACTUAL=000000
> ]]       REG EXPECT=000000
> ]]
> ]]   POSSIBLE FAILING "FRU'S":
> ]]             INTERFACE - M8029
> ]]
> ]]   UNIT#0 RXCSR=000000 RXESR=000000 CMD=000000 ->
> ]]  ->NO PWR, CABLED BACKWARDS, STRAPPED RX01, PDP-8
> ]]  DROP UNIT#0 FROM TEST
> ]]
> ]] PASS ABRTD THS UNIT
> ]] CZRXFB0 SYS FTL ERR  00040 ON UNIT 01 TST 011 SUB 000 PC: 003476
> ]]  CSR BITS - LGC TST
> ]]   AC LOW FATAL ERROR
> ]]       REG ACTUAL=000000
> ]]       REG EXPECT=000000
> ]]
> ]]   POSSIBLE FAILING "FRU'S":
> ]]             INTERFACE - M8029
> ]]
> ]]   UNIT#1 RXCSR=000000 RXESR=000000 CMD=000000 ->
> ]]  ->NO PWR, CABLED BACKWARDS, STRAPPED RX01, PDP-8
> ]]  DROP UNIT#1 FROM TEST
> ]]
> ]] PASS ABRTD THS UNIT
> ]] CZRXFB0 EOP    1
> ]]     2 TOTAL ERRS
>
> So, the possible errors according to XXDP:
>
> - Bad power - I get 25v, 5v and -5v. The motors are spinning, not
>   convinced it is this?
>
> - Cable backwards - I don't think I'd be hearing that clunk.
>
> - Strapped RX01 - I don't know what this means
>
> - PDP8 - eh?
>
> If anyone has any suggestions it would be great to hear them.
>
> Thanks,
> Aaron.


-- 
Aaron Jackson
PhD Student, Computer Vision Laboratory, Uni of Nottingham
http://aaronsplace.co.uk