>>Perhaps the coolest thing I've seen so far is that you can almost use
this
>>thing to create a front panel for an LSI-11 system. You can certainly
>>deposit and examine memory and start and stop the processor :-)
Really? LSI-11 never stops, it idles in a microcode loop. Also LSI-11
has
microcode ODT, that is the front pannel.
Allison
Does anyone out there get manuals for HP5036A microprocessor trainer kit?
Please let me because I am looking for this manual. Please reply to
augustineudoh(a)aol.com. Thanks
A. Udoh
From: Eric Dittman <dittman(a)dittman.net>
>I'm trying to write some RX50 disk images
>using Teledisk. I can use 22DISK and PUTR
>to format the floppies, but Teledisk will
>not write to them. I get an error that
>the drive or controller is returning an
>unsupported status.
The MSDOS floppies MUST be bulk erased first PRIOR to formatting.
I have had poor results otherwise.
Allison
From: Eric Dittman <dittman(a)dittman.net>
>> > I'm trying to write some RX50 disk images
>> > using Teledisk. I can use 22DISK and PUTR
>> > to format the floppies, but Teledisk will
>> > not write to them. I get an error that
>> > the drive or controller is returning an
>> > unsupported status.
>>
>> What happens if you format them as MS-DOS floppies, and then try to
get
>> Teledisk to write to them? I believe that is the way Teledisk expects
them
>> to be.
>
>I'll try that and see.
Dont bother. MSdos formats as 9 sectors of 512bytes, RX50 format is 10
sectors of 512bytes. Putr I think will do that as would some DEC
diagnostics.
RX50 format is:
10 sectors, 512bytes
96 TPI, 80 tracks single sided, double density (250kbs)
Allison
Since I've now got my Pro380 reloaded from scratch
and working, I'm now looking for a DECNA Ethernet
interface card so I can connect the Pro380 to my
network. If anyone has a spare they'd be willing
to sell, please let me know.
--
Eric Dittman
dittman(a)dittman.net
Hi Michael,
When I read your post about a pallet of ten PDP-8's, it reminded me
of an old Far Side cartoon, which had something to do with two
cats watching the scene of a truck crash between "Bob's Small
Furry Rodents" and ... I don't remember what the other truck
said. Anyway, I imagine your message set off salivation glands
around the world.
I saw a PDP-8 bring in $800 on e-bay a couple of weeks ago.
Someone on this list said that a year or two ago, they were going
for upwards of $2K. I don't know what they go for at swaps/
hobbyist fairs. In any case, the supply of them is very scarce,
due, no doubt, to electronics shop owners who've hoarded
them by the pallet load. Whatever you pay for them, I don't
think you'll have any trouble getting rid of the ones you can't keep.
I'm not yet a collector but have recently started looking for
a PDP-8 and a PDP-11. I learned programming on these
things and I'd really like to have one to restore and maintain.
Whatever happens with this pallet, could you let me know
if and when one becomes available? I'd really appreciate
it.
Thanks
Brian Knittel
well, the boxes with intended for multidrop or high-bandwidth
serialized
compressed digital video are not on topic for this thread. We're
trying to
establish whether there really are digital interfaces to the old
(get
it...classic computers... over 10-years old ... using interfaces of
that era)
Sorry but digital video wasn't new when I started in broadcasting in the
early 80s.
The BBC used digital for distribution and moving captions were stored
digitally
(remember the translucent spinning globe? Megabytes of data compressed into
a 600kbyte EPROM store).
So you'be suggesting 5 bnc's? three for video and two for sync
signals?
No, one.
Lee.
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On May 12, 8:23, John Allain wrote:
> I't just that an RJ45 didn't Have to be ethernet, so I had to check.
Indeed, it could be a serial connector, a phone jack, ISDN, or even (if you
were looking at an Asante FriendlyNet adaptor) the AUI side of a
transceiver.
> Also, it was small enough that I wasn't even thinking it was a
> transciever, so thanks Pete T. Most modern networking cards
> pin out at 10bT anyway, wonder what the native signals are here
> (Quadra)?
Well, I'm assuming that what you have is a small box with an RJ45 socket,
and a short cable with something that looks like a tiny Centronics printer
plug, but with fewer pins? That's the AAUI (Apple Attachment Unit
Interface) connector.
> Also I wasn't thinging of the cost angle.
> Oh, Apple! Yeah that costs.
:-)
--
Pete Peter Turnbull
Network Manager
University of York
Take a look at ftp://zane.brouhaha.com/pub/dan/20ma.gif
Dan
-----Original Message-----
From: Megan <mbg(a)world.std.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Thursday, May 10, 2001 11:35 PM
Subject: In search of 20ma to eia converter
I have an old serial paper tape reader which runs with
20ma and would like to use it to archive all my pdp-11
(and some pdp-8) paper tapes. But I need a converter...
Can anyone help? Any pointers to a simple schematic?
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
> > What happens if you format them as MS-DOS floppies, and then try to get
> > Teledisk to write to them? I believe that is the way Teledisk expects them
> > to be.
>
> I tried to format them as MSDOS floppies. Track 0
> writes okay, but then Teledisk fails with the message
> that Track 1 Side 0 Sector 10 can't be found.
I searched around and found another Teledisk 2.15
archive. This archive had two different sets of
Teledisk, one of which used the BIOS and the other
a direct method to access the floppies. I'm now
able to write using the direct method.
--
Eric Dittman
dittman(a)dittman.net
