This isn't quite the way I remember the CMU instructions working. Nor
is it exactly how I've implemented them in my emulator.
>Another oddball thing was then then-new Cyber 72/73 CMU. An interesting
>beast, but not present on the 74.
Presumably because an instack loop could move data faster.
Possibly a long shot since I think the MPF was only a UK/Europe thing but
At least one made it to South Africa.
But no, I have neither the expansion board nor the manual I'm afraid.
W
Hi all.
is there a list of equivalents for DEC ic's?
I've made a mistake in attaching our BA-8 to the PDP8/f and twisted the
ribbon cable connecting connector C and D. some magic smoke came loose
and there are a few chips broken . :-(
by comparing the signals on those connectors, I made a
On 03/09/2015 09:05, simon wrote:
is there a list of equivalents for DEC ic's?
I've made a mistake in attaching our BA-8 to the PDP8/f and twisted the
ribbon cable connecting connector C and D. some magic smoke came loose
and there are a few chips broken . :-(
Ow.
I don't have a list, but I
While I was trying to read the ROM in my 9121 for Eric Smith I found
out that my Wellon VP-280 could not do it (it could not recognize it
and only read FF FF FF FF). I could use it however to dump the ROM of
an IBM PS2 that I cannot boot anymore (so it is not entirely useless).
So I am asking what
You may know all of this but just in case ...Assuming you have reader that
can detect ROM type and compatible with ROM you are trying to read. May be
jumper change required? For example my Logical Systems Shooter has a
different jumper thay must be installed for each EPROM type.
Bill Degnan
twit
RK05 would be suitable
Guy Sotomayor wrote:
>
>
>On 9/2/15 8:42 AM, j...@cimmeri.com wrote:
>>
>>
>> On Tue, Sep 1, 2015 at 11:39 AM, Jay Jaeger wrote:
>>
>>> On 9/1/2015 10:01 AM, Ethan Dicks wrote:
> run Unix V1
I am very interested in the MEM11 for this exact reason. I have a
>>>
Here's what I did to replace a broken 8235 before I found an exact
replacement.
http://imgur.com/a/QVRLs
Kyle
On 09/03/2015 4:56 AM, Vlad Stamate wrote:
While I was trying to read the ROM in my 9121 for Eric Smith I found
out that my Wellon VP-280 could not do it (it could not recognize it
and only read FF FF FF FF). I could use it however to dump the ROM of
an IBM PS2 that I cannot boot anymore (so it i
Hi folks,
as you might remember I made about 20 OmniUSB Omnibus to USB adapters. Since a
few month they're all sold.
The last days I got some inquiries for more. So I think of making a new batch.
As my board supplier has doubled (It was so cheap before..!) the price for gold
plated contact P
At 07:56 AM 9/3/2015, Vlad Stamate wrote:
>So I am asking what you all use to dump various ROMs from vintage
>PCs/peripherals/etc?
For 1980s ROMs I still use the Serial EPROM Programmer published in BYTE by
Steve Ciacia in the mid-80s.
Dale H. Cook, Roanoke/Lynchburg, VA
Osborne 1 / Kaypro 4-8
On Thu, Sep 3, 2015 at 10:24 AM, Philipp Hachtmann wrote:
> As my board supplier has doubled (It was so cheap before..!) the price for
> gold plated contact PCBs,
If you don't mind sharing, which supplier is it? Is the connector
plating hard gold over nickel? How many microns (or micro-inches) o
Haha, it's down for lack of articles. See my other post :-)
Von meinem iPhone gesendet
> Am 02.09.2015 um 22:57 schrieb Jay West :
>
> And the online store is apparently "down for maintenance" :\
>
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf
On 03/09/2015 14:52, Kyle Owen wrote:
Here's what I did to replace a broken 8235 before I found an exact
replacement.
http://imgur.com/a/QVRLs
Impressive!
--
Pete
Pete Turnbull
On Fri, Aug 28, 2015 at 5:08 PM, Lyle Bickley wrote:
> On Thu, 27 Aug 2015 14:28:30 -0500
> Ben Sinclair wrote:
>
>> The CHM has a bit of information, and links to three other 1620's that
>> they know about:
>> http://www.computerhistory.org/projects/ibm_1620/ibm1620/
>>
>> From what I've been re
I was going to ask a similar question here, and I am sure it has been asked
before. I do have a HP 82901 and a HP 9121 but I am not equipped to read
ROMs, so I can't really help yet. Plus I will soon need the ability to burn
ROMs for my HP 85 and HP 1000. Not only the standard 24 pin ROMs but the
Some ROM don't have the same enables as 2716 or other EPROMs.
I usually make up a header that I ensure that the programming voltage
can't get to the ROM and I make high low switches for the various select
lines. Then I use a standard eprom programmer to read ROMs.
I could make something with an Ard
Marc wrote
HP 1000. Not only the standard 24 pin ROMs but the small 14 or 16 pin
bootloader ROMs that Jay showed me at VCF. What would be a good ROM
programmer that could read and write these of older HP equipment ROMs?
---
The Data I/O 29B works perfectly for those old fusable link p
A pal could have worked as well.
Dwight
I'm doing a bit of cleaning out of random things I don't use much
anymore; hopefully these can find a good home.
Make an offer on these, I'd prefer local pickup (for the VDP-80 I
require it, it's just too large/heavy/fragile to trust with shipping)
near Seattle.
Thanks,
Josh
Here's what I h
On 09/03/2015 08:49 PM, dwight wrote:
A pal could have worked as well. Dwight
A GAL should also be useful--and maybe a bit more flexible. To emulate
the OC outputs, one can simply manipulate the output enable so that a
'1' output is High-Z and '0' is, well, '0'. I believe individual oput
I'm looking into a road trip from Champaign to Maine via Indy, Detroit,
Windsor, Niagra Falls, Buffalo or 1000 Islands, Syracuse to Boston area,
and up to Maine. Not sure about the return Route.
I'll be leaving late Sep or early Oct.
I have talked to a few list members about dropping off/picking
Hi Simon,
As others have implied, the DEC8235 is a Signetics 8235N. It's available
from obsolete part distributors. A quick search turns up this source:
http://www.4starelectronics.com/part_detail/8235N.html
While the RFQ instead of a price is bad news in some places, I've had
good results wi
Dear Wayne,
If anything comes up from Nemonix let me know and I will see what I can do.
Since I work for neither company I can volunteer some time for Nemonix as well.
I am going to post the link to the Nemonix DSSI link.
Sue
> On Sep 3, 2015, at 3:31 PM, Stephen Lafferty wrote:
>
> Hi Si
On 03/09/2015 20:31, Stephen Lafferty wrote:
--- Thought I had a longer list somewhere but this short list is what I
find at the moment:
I think you'll find a 380 and a 384 are not the same :-) But the 8270/8271
substitutions by 74178/74179 seem to match and are good to know.
A leading additi
My dad shops out prototype PCB manufacturing to a firm called Omnitrace (
http://www.pcb4u.com). He sends them layouts and they send back bare boards
which he stuffs in the lab ... He says the price is the best he's found,
there's no minimum run size (not sure on the plated edge connectors,
though)
On Thu, Sep 3, 2015 at 6:57 PM, Vlad Stamate wrote:
> I am not sure about the part number it was under the sticker with the
> ROM version (which btw was 09121 15510 REV A) and I put it back into
> the unit.
The PCA silkscreen diagram in the service manual shows F2364, which is
an 8Kx8 masked ROM.
On 3 September 2015 at 10:15, John Robertson wrote:
> Some of the early ROMs had extra voltages and unusual select logic and for
> those you either need to make an adapter or get an ancient Eprom programmer
> to be able to read them.
>
> I use Data I/O 29B with a Unipak for most of my old timers,
On 9/2/2015 9:51 PM, tony duell wrote:
"FMPS" is.?"_ _ print set"?
Field Maintenance Print Set
-tony
Thanks! I've seen the term before but never saw it defined. Very
little experience with the pdp docs environment. These are specifically
defined sets of diagrams and
>> Field Maintenance Print Set
On Thu, Sep 3, 2015 at 6:39 PM, steve shumaker wrote:
> These are specifically defined
> sets of diagrams and/or schematics for a particular part/module/assembly?
Sometimes a module, sometimes an assembly, sometimes an entire
computer or computer system. Some FMPS
On 09/02/2015 11:05 PM, Jeff Woolsey wrote:
This isn't quite the way I remember the CMU instructions working.
Nor is it exactly how I've implemented them in my emulator.
Sorry that my explanation was scrambled with a few blown synapses. I'll
try again.
CMU was implemented in the lower Cyber
Holm Tiffe wrote:
> Since the capacity of 2x RF31 and 1x RF71 disks is a little bit low
> for VMS with some compilersi (~400MB every disk), I've looked for a bigger
> disk, at least for the sytem itself. (I've already relocated the pagefile
> to the 2nd disk).
> Ok, there are RF73 available at eba
On 09/03/2015 8:45 PM, Jay West wrote:
Marc wrote
HP 1000. Not only the standard 24 pin ROMs but the small 14 or 16 pin
bootloader ROMs that Jay showed me at VCF. What would be a good ROM
programmer that could read and write these of older HP equipment ROMs?
---
The Data I/O 29B wor
On Fri, Sep 4, 2015 at 2:01 AM, Holm Tiffe wrote:
> Hmm.. I see, I must be the only one that has ever seen a DSSI disk...
>
> Thanks to all that haven't answered.
Sorry I can't help. I own no DSSI gear, never had to fix it, and from
your well-written description of the problem, clearly know far
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