Re: netbsd on vax 11/730; booting in sim

[Anders Magnusson <ragge%ludd.ltu.se@localhost>]

Johnny Billquist wrote:
> Anders Magnusson wrote:
>> Brad Parker wrote:
>>> Anders Magnusson wrote:
>>>> Hehe, interesting :-)
>>>>
>>>> I might put the dust off an old 11/750 with an RP07 disk and see if
>>>> it works with 5.0... :-)
>>> >From what I saw the 750 support should work fine.  Only the 730 code
>>> was
>>> missing.  Certainly with 2.0.3.  I have not tried anything more recent,
>>> but I will.
>>>
>>> mmm.  an RP07.  Have you spun it up recently?
>>>
>> About a year since last time.  I also have a RP06, but the disk formatter
>> has some problem and I haven't fixed it yet. Usually connected to a
>> DEC 2020 :-)
> 
> Formatter as in software? Just whip some together. The documantation is
> available. Or drop by Uppsala and we could format the pack on our 11/70.
> 
No, the hardware.  Hm, I think formatter is the corresponding word on
tape drives.  Gee, I haven't used these words in so long time so I
may even use the wrong words :-)


>> The RP07 should not be able to connect to 11/750 due to the high Massbus
>> data rate, but I have never encountered any problem.
> 
> The RP07 can be set to two different transfer speeds. It's a jumper
> configuration in the drive, and it just changes the data transfer speed.
> If it's set to the lower speed an 11/750 should probably be fine. Don't
> know if it was officially supported though.
> 
It wasn't.  I assume that even with the lower speed (1300KB/s) so could
it be too high if multiple disks were connected, or something.  RM80 was
supported though (1200KB/s).

-- Ragge