30 Apr
2015
30 Apr
'15
1:05 p.m.
Noel,
Maybe you know about it, but here is the commented source code of all
M9312 bootloaders. I found it on www.ak6dn.com 5 years ago, but the page
seems dead now.
Very likely the actual PDP-11 code is identical to M9301, but the
organization of the bootloaders inside the ROMs is different:
M9312 has a modular structure, because ROMs can be changed
independently. M9301 has a central directory.
Hope this helps,
Joerg
Am 30.04.2015 um 17:06 schrieb Noel Chiappa:
From: Jorg
Hoppe
> Here's what I have so far:
> http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/M9301-YA.mac
Thanks for that effort!
Eh, de nada. Interesting and educational.
The M9312 code should be similar, at least it may
expose some ideas
Some parts of it (e.g. the CPU diagnostic) are mostly identical (and the
comments there, particularly on the single-op register instructions, are
useful to total understanding of that code in the M9301); but alas, I had
already done that part of the M9301 (at least, at a surface level)!
Much of the M9312 (including the functionality of most of what I had yet to
read in the M9301) was quite different. I did manage to get the 'print
number' code out of it, but that was pretty much it.
So I've done a lot of the remaining M9301-YA code (new version uploaded to
location above); not the per-device code, I'll probably blow that off, but
other than that, only a few tiny sections remain to be understood.
Can someone with a M9301-YA please verify for me that location 165450
contains 0770? I think that perhaps that is wrong, because the code makes no
sense if that's correct - maybe a bit has been dropped, or something?
And if anyone has a good M9301-YB, I would appreciate a dump. (I do have one,
but don't - yet - have a running UNIBUS -11 to plug it into.)
From: Don North
I've had two DL11-W in my 11/34A BA11-K box
for years and have never
had an LTC issue. I suppose if you had a a larger number (say four or
more) you might possibly see an LTC issue
Hey, all I know is what's in the manual (which Josh posted). :-)
I'd forgotten there was a jumper you could pull - I tend not to like to do
things like that as it makes the cards non-pull-and-plug interchangeable. Hence
my suggestion to 'just use an M7800'.
Noel