On 2017-11-08 15:00, Paul Koning wrote:
On Nov 7, 2017, at 8:01 PM, Johnny Billquist <b...@softjar.se> wrote:
On 2017-11-08 01:54, Paul Koning wrote:
...RSTS definitely did not. It does support mixed RP/RM massbus, which is more
usual but not universal either, I think. But no mixing disk and tape.
Thanks. I was wondering about RSTS/E, but didn't dare saying something
definitive. That it allows mixing of RM/RP is nice. I think in plain -11M, even
that might not be allowed, but I would have to go and check and refresh my
memory.
M+ allows any kind of combinations.
It's possible that the first Massbus support in RSTS didn't allow mixing RP and
RM, but it certainly appeared soon after, I'm pretty sure by V7.0 at the
latest. So as of that point, RSTS supported two Massbus adapters for disks,
and each of these could have any Massbus disk on it. Even an RP07, on an 11/70
at least, though officially that was not supported (DEC didn't sell that device
on lowly PDP-11s).
Heh. I sortof noticed. I was running an RP07 on an 11/70 for several
years in the 90s. RSX more or less have support for it, but disk
formatting tool lacked the module for it, so I had to write that one.
The rest worked fine. All drivers, error logging, SYSGEN and so on
supported the RP07 just fine. I assumed that the issue with formatting
was because they in the end decided to not really care about the RP07
for PDP-11s, and there was also a formatting tool under XXDP, which I
assumed people would have to use instead.
And of course, documentation do not mention the RP07 either (it also
mostly omits the TU78, even though there was a device driver for that too).
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: b...@softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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