There has been some work going on emulating early Laserwriters in MAME and I was wondering
if anyone still has boards or firmware dumps from Laserjets.
It seems most have been scrapped.
"nobody collects printers"
Hi folks,
Could anybody spare a clue or some suggestions on how to access the contents of:
http://bitsavers.trailing-edge.com/bits/DEC/pdp11/floppyimages/rx02/BASIC-1…
under simh? I haven't had any luck mounting the contained BASIC.DSK e.g. on simh RY under RT-11. Looking through a dump of the image, there seems to be an "RT11A" signature. Tried putr under dosbox as well, but it seems to hang mounting the image.
Suggestions appreciated!
--FritzM.
> From: Jay Jaeger
> BTW, I have only the sales brochure for the DM11, near as I can tell.
> 114X-00871-1715/J . If you want me to drag the box of sales lit from
> the garage, and scan it, me know - could do it next week.
No major need for it; I found the DM11-AA Tech Manual in my PDP-11 fiche set.
So I doubt the brochure would answer any of the remaining questions; we'd
probably need the Engineering Drawings for that. But there's so little on the
DM11, it might be interesting to see the brochure.
The big issue with the TM is that it has the same erroneous diagram for i)
the boards in the DM11-A, and ii) their locations in the backplane, as the
one in DEC-11-HDMBA-A-D, "DM11-BB modem control option manual", on pg. 1-5.
The diagram there lists:
M7245 Transmitter E
M7244 Transmitter D
M7245 Receiver
M7242 Control C
M7241 Control B
M7240 Control A
So two 'M7245's, with different functions listed! And no M7243...
The DEC "Spare Module Handbook" shows:
M7243 "DM11 transmitter D"
M7244 "DM11 transmitter E"
M7245 "DM11 receiver"
so the M7245 probably _is_ the receiver; but this list shows that the
'transmitter E' card is the M7244, not the M7243 (as would be if the top line
>from the module diagram had a typo '5' for '3'.
Hence my observation that it would probably take takethe ED tostraighten
thins out. But as I said recently, no real need; the thing is a total
canine, and I doubt very much that there are any left in the world.
Noel
Does anyone have experience running the MTI MXV22M? It's a dual-height QBus card that emulates RX02 but uses a 5.25" 96 TPI drive. I've got a small heap of them and we're trying to get them going.
When trying to format diskettes using the process documented in the manual, the drive selects for maybe a second then deselects, and we get a drive not ready error. The controller isn't using the ready line, as the SA-460 for which it is designed doesn't supply it. No traces physically connect to pin 34.
Since we're close to out of ideas, we've also plugged in a pair of Shugart SA-800s, on the idea that maybe the MXV22M is close enough to the MXV22 to show some signs of life. It doesn't give a drive not ready error, and it will step the heads like it's really formatting, but never loads the heads.
Happy for any input on this one!
Thanks,
Jonathan
My KA655 CPU is freezing during the power up sequence, after test number 04:
KA655-B V5.3, VMB 2.7
Performing normal system tests.
40..39..38..37..36..35..34..33..32..31..30..29..28..27..26..25..
24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09..
08..07..06..05..04..
Any suggestions as to what might be wrong?
Hi,
I'm not prepared to lay out $200 for these Xerox ROMs, but if I do manage
to get them, I'll read and share them. I did not know there were 5.0 ROMs
for the 820-II, but it appears there were, and they are included.
https://www.ebay.com/itm/184980603844
Mark
--
Mark G. Thomas <Mark at Misty.com>, KC3DRE
Hi,
I'm not prepared to lay out $200 for these Xerox ROMs, but if I do manage
to get them, I'll read and share them. I did not know there were 5.0 ROMs
for the 820-II, but it appears there were, and they are included.
https://www.ebay.com/itm/184980603844
Mark
--
Mark G. Thomas <Mark at Misty.com>, KC3DRE
> From: Jay Jaeger
> ROTFL - especially given the earlier case, and since Noel knows about
> you folks quite well..
The joke's actually on you:
DQ11_RevL_Engineering_Drawings_Aug75.pdf 2021-08-09 14:05
^^^^^^^^^^^^^^^^
I'd actually looked in http://bitsavers.org/pdf/dec/unibus earlier that
morning (before I sent my request), and by chance I still had that
browser window open. I suppose I could have done a screen-shot...
> From: Al Kossow
>> You aren't by any chance sitting any DM11-AA manuals, are you? :-)
> probably. there are still quite a few drawings to go through
That was mostly a joke. I mean, there are no DM11-AA documents of any kind
online, so it would be interesting to get some (there are still a few
un-answered questions); but there's a good DM11 entry in "pdp11 peripherals
and interfacing handbook", 1972 edition, that enabled me to produce a decent
entry:
https://gunkies.org/wiki/DM11_asynchronous_serial_line_interface
which is probably more than good enough - the interface is actually
a dog, I doubt any still exist.
Noel
Hello,
During a clear out I found the following floppy disk sets, I am not sure if they are of any use to anyone:
Pathworks V5.1 (35 disks) plus LAN Mgr Setup - these are copies not originals
Mastering Windows Programming with Borland C++4 (Sams - don't have the book though!)
Borland SQL Link for Windows for Interbase 3.3 (3 disk)
Paradox for Windows V 4.5 (2 disk)
Paradox for Windows Object Converters for Forms (1 disk)
Turbo C++ for Windows 3.1 (7 disks)
Proto Gen V2.2 (1 disk)
Adaptec 7800 Family Manager Set for Win NT 3.5 or Win 95/98 (3 disks)
CDs -
Adaptec EZ-SCSI Deluxe Edition V5
Easy CD Creator & DirectCD
All are untried and I have no means to read them, but have been stored in a clean environment, some still in their original wrapping, free except for the cost of postage (I am in the UK).
Regards Mike Norris
