14 Jun
2016
14 Jun
'16
2:14 p.m.
Annnd, top-posting with an answer to my own question.
One has to patch PIP to modify the size of the partitions; this is actually spewed out
during assembly of MULTOS.BN:
2.32. 43 NOTE: SYS DEVICE SIZE = 2720
2.32. 43 NOTE: SET PIP LOCATIONS 13623, 13656,
2.32. 43 NOTE: AND 13657 TO 5060
(Values will vary depending on how your system is configured.) That'll teach me to
ignore the output of the assembler when there are no errors :).
Use ODT to hack up PIP, SAVE it and you're good. J1: through J4: are now 1432 blocks
in length.
The SYS: device is still reporting as ~3000 blocks, though. And since it comes with over
2700 blocks filled, I made sure to free up ample space, and did a SQUISH so things
won't collide (hopefully.)
Hopefully this saves someone some time in the future...
- Josh
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Josh
Dersch
Sent: Tuesday, June 14, 2016 10:14 AM
To: 'General Discussion: On-Topic and Off-Topic Posts'
<cctalk at classiccmp.org>
Subject: MULTOS/8 progress, and a question...
Hi all --
Having overcome my earlier issues with SIMH, I now have MULTOS/8 happily
running on the real hardware, with two terminals. (Yay!). I'd like to get the
system up to four terminals and here's where I'm running into trouble.
I've modified PARAM.PG appropriately (set JOBS to 4, TERMS to 4, and filled
in the device codes for the extra terminals). I've rebuilt JOBS.BN and
MULTOS, ran BUILD and inserted J1 through J4 and everything runs and the
system comes up with 4 terminals (yay!).
What isn't working properly are the job devices J1 through J4 -- each of these
provides each terminal/user his/her own "virtual" drive on the system's
RK05
pack -- effectively it partitions the RK05 into four smaller drives, J1: through
J4:. With the two user setup, J1: and J2: are approximately 3000 blocks in size
(so each basically gets one side of the RK05 pack). With the four-user setup,
I'd expect J1:, J2:, J3: and J4: to each be about 1500 blocks, but they're still
reporting as 3000 blocks each.
What's more, the actual starting offsets of J1: through J4: appear to be what
I'd expect (that is, J1 starts at 0, J2 starts at ~1500, J3 starts at ~3000, etc.).
So
if I start filling these drives, eventually they clobber each other.
The only manual I've found (http://www.pdp8.net/os/multos8/) suggests
that these should be appropriately sized (see section 2.1.1) automagically,
but this does not seem to be the case; doing a ZERO on them creates a
filesystem 3000 blocks in length.
I'm digging through the source code to look for clues, but I haven't found
anything yet.
Anyone fooled with this before?
Thanks,
Josh