[cctalk] Re: Data general MicroNOVA

[jos via cctalk]

On 08.07.24 13:40, jake utley via cctalk wrote:

I was lucky enough to pick up three MicroNOVA cards and one was a mN602 CPU 
card. I would love to rebuild the system it came from which was a MP/100 or 
MP/200 from my research since the mN602 is a nova 4 instruction set chip so is 
pretty powerful. Unfortunately I only have the CPU card a line printer 
controller and a mystery card I haven’t yet identified.



The MP/200 (I have one) is an AMD2901 based system, yours must have been a 
MP/100

Jos

[cctalk] Re: Help? Programming SCM90448 EPROMs

[jos via cctalk]

Gents, please be aware of the WSI 57C49 Eprom, 8Kx8 in a 24 pin DIP
It can go low as 25nS access time.

Note that addresslines A10,A11 and A12 are swapped, so the contents needs to be 
moved accordingly.
I used the C program below to create replacements for some Tektronix 4052 ROMS


Jos





#include 
#include 

/*
 * radapt 
 *
 * quick hack to transpose rom inages from mk36000 to wsi57c49
 * These are pincombatible except for A10, A11 and A12
 *
 */

#define        K8 8192
#define        K1 1024

unsigned char in[K8], out[K8];

void move(int a, int b)
{ int i;
printf("%d %d\n",a,b);
for (i=0;i

[cctalk] Re: VCF SoCal Saturday

[jos via cctalk]

- I guess while I'm at it, I've also been seeking for a working Datapoint
2200 (or equivalent variant, any 1974 or earlier) or Wang 2200.  Even just
seeing either of those in working condition would be neat (working in terms
of still booting to BASIC).   I was surprised I didn't see one at VCF in
Dallas last year (but they did have a HP9830 and Tek4051, those were neat
to see and still working)..  The Wang systems have some decent emulators,
but I don't recall emulators for the early Datapoints.-

There now  is a Datapoint 2200 emulator, see https://github.com/MattisLind/DP2200 

Mattis is trying to add DP5500 support.

Be aware that it does not show the true Datapoint fonts.

Jos

[cctalk] Re: Looking for datasheet of RTC M3001 ...

[jos via cctalk]

On 11.04.23 18:35, Bernd Kopriva via cctalk wrote:

Hi,
a friend of mine is currently working on a FPGA implementation of the CERES-3 
workstation (cpu-ns32k.net/TRIPUTER.html#Ceres).
He currently lacks of information of the RTC chip M3001 which was manufactored 
by Swiss company Microelectronic-Marin.
Does anyone have a pointer to the datasheet ?

Thanks Bernd


Did you try the company itself ? https://www.emmicroelectronic.com/welcome

Also the Ceres source code is available. I have assembler source for the 
bootstrap of the Ceres-1 system.

Jos

[cctalk] Re: WTB Any storage for a PDP 8/A

[jos via cctalk]

On 25.02.23 18:52, silvercreekvalley--- via cctalk wrote:

Thanks Vince - I knew about the RX emulators but not the serial disk - that 
sounds interesting. Is there any documentation on that - I had a look at the 
GitHub but seemed a bit sparse.

I can imagine the FFP8/A is hard to find and replicate. I can probably use 
emulation - but its nice to check with real hardware.


This is probably not the right place to link the youtube video of the guy that 
destroyed a FPP8/A set to recover the gold on the PCB-fingers...

I do have a rather complete 8/A, with RL01 ad FPP8/A. Alas no sockets inside so 
the PROMs cannot easily be read out.


Jos

[cctalk] Re: Philips P2000C restoration

[jos via cctalk]

On 25.01.23 11:08, Tony Duell via cctalk wrote:

On Wed, Jan 25, 2023 at 7:52 AM jos via cctalk  wrote:


Interesting and detailed description, thanks !

my P2000C "restauration" was much simpler :

I picked it up, including carrying case and all the original disks,  from the 
e-waste ( illegally..) and found it be be in pristine condition,

It booted straight up

Where's the fun in that?

-tony


Not much, agreed. But plenty of other stuff here to keep me occupied well until 
I am 130 years old !

[cctalk] Re: Philips P2000C restoration

[jos via cctalk]

Interesting and detailed description, thanks !

my P2000C "restauration" was much simpler :

I picked it up, including carrying case and all the original disks,  from the 
e-waste ( illegally..) and found it be be in pristine condition,

It booted straight up


Jos

[cctalk] Re: Diablo series 30 or Dec RK03

[jos via cctalk]

On 08.01.23 01:51, jake utley via cctalk wrote:

Hello everyone I’m a young collector (18) of 60s and 70s minicomputers and 
micros. I have been restoring a PDP-8L and would love to find ether a Diablo 
series 30 or Dec RK03 removable cartridge drive to go with this system.


Is it even possible to add a diskdrive to a PDP8/L ? My 1970 "Small computer 
handbook" only mentions TU55/TC01 and DF32 as mass-storage options for the 8/L. Both 
are essentially unobtainable.

Maybe sell the 8/L and get yourself an 8/E or /F ? Much more flexible.


  I am in the uk South Yorkshire to be precise and would love any leads anyone 
could provide on where I could find one would very much appreciated. If nobody 
know where one of these drives can be located any means of mass storage for a 
pdp 8L and data general nova system w


Which Nova precisely ?

As an aside to the list : I do have an 8/E & Diablo 44 combo for sale ate 5K ( 
which is what I paid for it) Located in CH

Jos

[cctalk] Re: Any working Datapoint 2200 systems?

[jos via cctalk]

On 13.11.22 21:14, Steve Lewis via cctalk wrote:

Thanks Jos, I hadn't realized how similar the DP1100 is.

This brochure has a great image of the font right on the front page (80x12
text):
http://www.bitsavers.org/pdf/datapoint/1100/Dataform_1100_Brochure_1974.pdf


Maybe something similar can be done for the old DP's?  I understand for
authentic/historical perspective all original components is prefered, but
using a substitute PSU is reasonable for checking out the rest of the
system.

The DP2200 needs secondaries of 450V, 120V,40V, 25V, -25V, 12V, -12V 5V and 
-5V. Yep, can be done, but.

What an amazing system those Datapoints were, for their time.  The
chicken-farm story in the DP2200 book is really fun - these farmers being
savvy enough to code up what they needed, and the systems compact enough to
fit in the farms and using modems even to sync up data (pre-1975).


They were, and are, indeed nice little systems...really need to get mine up 
again, also because I have a Diablo disk system for it. Must be extremely rare..


But, in extracting the data on those TTLs, it seems like a modern replica
of a DP2200 would be possible.

Sure, I even have the complete DP2200 MB in Kicad, see 
http://www.bitsavers.org/pdf/datapoint/2200/jdreesen_shematics/DP2200_mb.pdf

if anyone wants to go ahead I will gladly share my Kicad project ! Mind you, 
the diddlescan is a problem as that requires a CRT yoke with 3 windings

Jos

[cctalk] Re: Any working Datapoint 2200 systems?

[jos via cctalk]

On 13.11.22 07:13, Steve Lewis via cctalk wrote:

I've been looking for a video or image that shows what font the original
Datapoint 2200 used.

It's not shown in the manual.   There is one vintage image with the office
lady and the DP2200 on the desk- but the font isn't very clear in that.

In any modern video about the DP2200, none of them seem to power it on --
which is certainly understandable.   From what I've read, the power supply
of that system is prone to failure.  Also, the system is hard-coded to load
from Tape 1 -- which means both the tape drive, and tape media, still needs
to be in good working order (which would be pretty rare after this time).

In "the" DP2200 book, it only briefly mentions that the original tape
software was developed "on an HP system" (without any elaboration that I
could tell on which HP system that was).

Nothing in the manual suggests the original DP2200 could "program itself"
(i.e. no built in machine code monitor -- those TTL chips had one strict
boot up sequence: load from tape 1).   If there was a read error or no tape
available, I'm curious if any message showed on the CRT.

So, I was just wondering if there was any known pre-1973 Datapoint 2200's
that are still working? (and/or if any HD video of them powered on and
legible font can be seen)  Or any other more current system that we know
for sure used the same font?

Thanks!
-Steve



Not only  is the powersupply prone to failure, it is also the most dangerous I 
have ever seen, and I am hesitant on working it. Primary and secondary sides 
not separated,  isolation between the two almost nonexistant, many primary 
nodes exposed. Would never pass modern safety checks.

But here is a picture of my DP1100, a DP2200 derivative, while it was running a 
memory selftest, for a short time in 2021, before the powersupply blew again :

https://forum.vcfed.org/index.php?threads/its-alive-my-datapoint-2200-1100.1222197/#post-1222197

While the DP2200 is hardcoded to start from tape, the DP1100, otherwise identical, 
boots from a ROM. This ROM also contains a minimal machinecode monitor. I recovered 
& disasembled the ROM and Gordon Peterson, from Datapoint, commented it out : 
http://www.bitsavers.org/pdf/datapoint/1100/DisketteBootDisassemblyGEP2.txt

Note that there are multiple videoboard options : the later DP2200, my DP1100, 
and the DP5500 share the same videoboard. This relies on a programmable 
characterset. In the disassembly mentioned above above, starting at line 3660 
you will see a load of gobldecook, these are actually fondsets to be loaded 
into the machine.

The fontset has a very particular "look" to it. How much is due to 
fontdefinition, and how much is due to the diddlescan, that I dont know. Diddlescan is 
where they scan each character in full, before proceding to the next.

Note that a  ROM based bootboard for a DP2200 would be a trivial undertaking,  
and only involve changing the cassette reader board for the ROM board.


Jos

[cctalk] Re: datapoint 2200 programming

[jos via cctalk]

On 17.10.22 06:08, Steve Lewis via cctalk wrote:

Thanks.  I was curious about if I found a Datapoint 2200 "in the wild" --

You'd be very lucky to find one. They are much rarer than the contemporary and 
similar ICL1501. And if you find one, watch out. The powersupply is seriously 
dangereous...

into appropriate audio tones -- unless they didn't actually use audio tape?)

They did not use audio tapes, but the digital variant.

Sounds like the "systems debugging" might allow injecting direct machine
code at addresses


You can do just that on my system. If you have a true 2200 with the dual 
cassette system you do not have a bootrom : system hardware will just load the 
first block from tape and start from there. One of the tapes has a monitor 
similar to the one in my bootrom.

 My system is a DP1100/Floppy, has no tapes, but a PCB with the bootrom instead 
of the tape reader board.  I intend to make a combined bootrom / tape reader 
board, as I would like to extend my DP1100 with casettes.


Jos

[cctalk] Re: datapoint 2200 programming

[jos via cctalk]

On 17.10.22 03:30, Eric Smith via cctalk wrote:

On Wed, Oct 12, 2022, 14:54 Steve Lewis via cctalk 
wrote:


Datapoint 2200 [...] iinstruction set was said to be similar what became
the
8008.


The instruction sets weren't similar, they was identical.

Not quite, II believe, O handling is different between DP200 and i8008.

[cctalk] Re: datapoint 2200 programming

[jos via cctalk]

On 12.10.22 22:54, Steve Lewis via cctalk wrote:

Does anyone know how the 1970/1971 original Datapoint 2200 was programmed?
It had tapes containing terminal programs to access different types of
systems.  And the instruction set was said to be similar what became the
8008.   But how were these terminal programs created and how were the tapes
written?Were they under emulators on larger systems, like a PDP-10?
  Were there any tapes that had something like a machine code editor and
tape-write routines?  I assume no kind of ROM was built into the system
(unless it had a built in machine code editor, and routines to write that
content to a tape?)   Was a version of BASIC ever built for the 8008 that
ran on a Datapoint 2200 or similar system?

-Steve


Look here to wat was available for this class of machines :

http://www.bitsavers.org/pdf/datapoint/software/6_Datapoint_Software_Catalog_Sep1982.pdf


So, yes, Basic, RPG, Cobol ( for 5500 upwards), Databus, Datashare, Dataform 
were available.

Programs development could be done standalone, even on a cassette-only system.

Keep in mind that Diablo 14" diskdrives were available for these system, 
allowing for quite a comfortable environment. For early 70's standards of course...

My DP2200 does have a bootrom, allowing for booting from floppy, or some 
simnple ad-hoc systems debugging. Look for the deocumented source code for this 
bootrom on Bitsavers.


Jos

[cctalk] Re: Minicomputer front panel.

[jos via cctalk]

On 24.09.22 23:59, Adrian Stoness via cctalk wrote:

o?

On Sat, Sep 24, 2022 at 12:30 PM jos via cctalk 
wrote:


On 24.09.22 04:57, Adrian Stoness via cctalk wrote:

Wow someone mentioning à phillips p series
Has a p854 new old stock panel my self along with bunch of manuals and à
spare core memory pack in safe keeping


I have spare P854's.

Jos



I have spare Philips P854 systems and CPU cards. These are AMD2901 based 
implementations of the Philips P85x series. They have VFD-based panel.

They have semiconductor memories, as opposed to the P856/857 which use core 
memory. These use lights-and-switches panel.

Jos

[cctalk] Re: Minicomputer front panel.

[jos via cctalk]

On 24.09.22 04:57, Adrian Stoness via cctalk wrote:

Wow someone mentioning à phillips p series
Has a p854 new old stock panel my self along with bunch of manuals and à
spare core memory pack in safe keeping



I have spare P854's.

Jos

Re: seeking Motorola M68MM01A2 documentation

[jos via cctalk]

On 19.01.22 01:22, Chris Elmquist via cctalk wrote:

On Tuesday (01/18/2022 at 11:35PM +), Jonathan Chapman wrote:

How's about a Glitchbus board set that's compatible? I was planning on doing it 
anyway.

That would be very cool.  Something along those lines was my plan B and
I even dug out a tube of 6802's for the effort.  I think I could wire
up a prototype over a weekend.  MC6802 is a nice "cheat" as you don't
have to mess with the two-phase clock stuff.

What would be really slick is an SBC that has everything on it to be
either an Altair 680 or an SWTPC 6800 just by changing some jumpers,
switches, etc. and putting the correct ROM monitor on the board.


Something around these lines ?

https://forum.vcfed.org/index.php?threads/tektronix-board-bucket-6800.54128/page-5#post-835416

Yes, it runs, I still have some PCB's left.

Works with both 6800 or 6802, memory map is defined with a GAL.


Jos

Re: core matt repair

[jos via cctalk]

On 21.07.21 16:32, Tom Hunter via cctalk wrote:

Hi Jos,

Resoldered how?


These joints are located above the core-mat. I just used my tiniest tip to 
reheat, no solder added.

These joints were not broken, just highohmic,  several  100 Ohms . I am still 
wondering what the exact failure was.

I did not bother removing ( or reapplying ) that laquer.


Jos

Re: core matt repair

[jos via cctalk]

On 21.07.21 02:15, Brent Hilpert via cctalk wrote:


In general comment to the topic, I have seen planar arrays ("mats") with some 
number of randomly-situated wire splices in them.
These splices are in the gaps between bit arrays, not interior to a bit array 
(there isn't enough space between cores).
The splices are covered in a tiny dollop of (by appearance) silicon putty for 
insulation.


I have seen the same, and measured that these splices can turn highohmic. I 
recovered an 8/L coremat by resoldering these splices.

Re: 920M - and also the Argus 200 / 700

[jos via cctalk]

Yep, Europe was also active at the time.

in the UK around 1960 the Argus 200 was developed to control the Bristol 
Bloodhound anti-aircraft rocket. This computer was one of the very first 
transistor-based control computers.

In Switzerland the Bloodhound was on duty  until 1999 ! One of the sites, once 
top secret,  is now a museum, and well worth a visit.

Check out https://www.museums.ch/org/de/Bloodhound-Lenkwaffenstellung

Besides the rockets there is plenty to see for the tech enthusiast : the 
illuminating radar,  a fully functional Argus 700 computer that was a major 
update of the Argus 200, and some remnants of the orignal Argus 200 computer, 
for instance the programmable ROM module.


Jos

Re: Old mainframes in Finland

[jos via cctalk]

On 07.10.20 20:14, Cindy Croxton via cctalk wrote:

I received permission to share this link. These are in a personal collection in 
Finland. Don't drool too hard :-)


That is Johannes Thelens' collection, located not all that far fom Helsinki.

Johannes has very kindly showed me around his collection, and he sure has some 
nice stuff around !


Jos

Re: Old mainframes in Finland

[jos via cctalk]

On 07.10.20 20:14, Cindy Croxton via cctalk wrote:

I received permission to share this link. These are in a personal collection in 
Finland. Don't drool too hard :-)


That is Johannes Thelens' collection, located not all that far fom Helsinki.

Johannes has very kindly showed me around his collection, and he sure has some 
nice stuff around !


Jos

Re: Tips on reviving a TU56 + TD8E?

[jos via cctalk]

Does anyone have any hints on what I should check from here?



I have seen both open-circuit magtape heads, and reedswitches that do not 
operate correctly anymore.

Luckily in my latest TU56 it was just the reedswitch..


Jos

Looking for a Stride OS set

[jos via cctalk]

I currently have 3 Stride 420 boards in various state of repair, one presumably 
fully functional,  and would need an OS set for these.

Anyone have actual floppies or IMD images of either ucsd.p or Liason OS for 
these machines, or even just CP/M 68K ?

There are disk iimages under the header "Stride"  on the web and Bitsavers,  
but these are actually for the previous generation machines ( Sage II and IV)

Jos

ICL1501 Cobol manual available

[jos via cctalk]

Since you are all talking COBOL now :

ftp://ftp.dreesen.ch/ICL1501

There is the manual for the early 70´s COBOL implementation for the ICL1501, a 
small 8K or 16K TTL based personal computer ( TTL based CPU, with 2x 74181 ALU 
and a 32x8 CRT display)

Not the best of scans, but that alas reflects the material I have.

Some other  doku on the ICL1501 is also included :  an operator guide and tape 
utilities user guide.

I do have the tape with the COBOL itself, alas no way yet of gettig it on 
modern hardware.


And if anyone has dokumentation on the ICl1503 or 1501/43, in particular the 
Diablo drive interface then I sure would like to see it !

Have the kontroller, but no documentation...


Al, as always, feel free to add any and all to bitsavers.


Jos

Re: 4054 in Sacramento

[jos via cctalk]

On 26.02.20 20:43, Al Kossow via cctalk wrote:

https://www.ebay.com/itm/TEKTRONIX-Model-4054A-ALL-IN-ONE-Microcomputer-Vintage/372966927909

good price, it's BIG though..


Would have loved to pick that up

Did I mention on this list that i remade (and sell... )  the Tektronix Field 
service Diagnostic Rom Pack ?

This will greatly enhance (digital-) fault finding in 4052/4054 machines.

See ftp://ftp.dreesen.ch/TEK_DRP/DiagPack_Manual.pdf


Jos

Re: 4054 in Sacramento

[jos via cctalk]

On 26.02.20 20:43, Al Kossow via cctalk wrote:

https://www.ebay.com/itm/TEKTRONIX-Model-4054A-ALL-IN-ONE-Microcomputer-Vintage/372966927909

good price, it's BIG though..


Would have loved to pick that up

Did I mention on this list that i remade (and sell... )  the Tektronix Field 
service Diagnostic Rom Pack ?

This will greatly enhance (digital-) fault finding in 4052/4054 machines.


Jos

Re: Fwd: Crypto AG

[jos via cctalk]

On 13.02.20 10:13, Paul Anderson via cctalk wrote:

I thought some list members might find this interesting. I still like what
the British did and the tunnel under Berlin.


https://www.washingtonpost.com/graphics/2020/world/national-security/cia-crypto-encryption-machines-espionage/?fbclid=IwAR2s7TrU9nXVXx4kUy-n7-LnXz3GM754uEzJjlPeTRa-TrOWhqm_QcH1HUI


Very old news, I am afraid.

 Iranians knew/suspected  that already in 1992, which is why a Swiss 
salesengineer for Crypto AG found himself in a Teheran military prison, subject 
to ¨intensive examination¨

No help from the CIA in securing his release


On a related note : Enigma type machines were used in the Swisss army. A few of 
these found their way in the Swiss army surplus shop, sold for a pittance.

If only  I had  known  then that these would be worth between 50-100K USD 
today



Jos

And yet another batch of IBM big iron one Ebay Germany..

[jos via cctalk]

an IBM 4331 for 1000 Euro b.i.n. seems OK to me, if I was in that sort of thing 
!

See  https://www.ebay.de/itm/IBM-grosrechner/184010116585 and his other 
offerings...



Jos

Re: Philips mini computers

[jos via cctalk]

On 26.10.19 11:00, nico de jong via cctech wrote:

Hi all,

Back in the 70's and 80's Philips had a quite popular series of mini computers 
called P800, which also branched out to the PTS series and possibly other.

Could I be lucky to find other list members interested in these products? I 
know of a few, but there surely must be others. I'm trying to collect what is 
left of the documentation.

73, Nico



Wel I am of course, but then you knew that !


Currently I have -:

- a P857

- a P856 missing the box, PS & backplane ( simple enough to reproduce )

- a measuring system based on the P854 CPU ( the same I brought you )

- a P851, missing the backplane, frontpanel,  a serial card and the PSU.

- 2 single-chip P800 CPU's


I have documentation on the P852, P956, P833 digital cassette

On software side not much : a single cassette with Fortran & manuals.


Yes, we should get Al interested in these ! But AFAIK they never made in to the 
US.


Regards, Jos

Re: Update: Received my 50lb Datapoint 2200 computer from Austria via regular post.

[jos via cctalk]

On 23.09.19 23:36, steven stengel via cctalk wrote:

First, I have to rewire it from 220vac to 110vac.


Lucky you, I would have driven over if had known about it ! Only a one-day 
return trip for me

Be carefully : some parts on the big cooling block are directly connected to 
mains.


Second - what to do about that screen?


Repair / clean it of course. This is what I did to my DP1100 :

Before : ftp://ftp.dreesen.ch/Datapoint/Pictures/Console/CPU_before.jpg

During : 
ftp://ftp.dreesen.ch/Datapoint/Pictures/Console/Pull_off_remaining_goo.jpg

Result  : ftp://ftp.dreesen.ch/Datapoint/Pictures/Console/CPU_after.jpg

.. and the full machine, in its orginal Datapoint desk :

ftp://ftp.dreesen.ch/Datapoint/Pictures/Datapoint_1100.jpg



Jos

Re: Anyone have any Datapoint software on floppy?

[jos via cctalk]

On 07.08.19 20:00, Al Kossow via cctalk wrote:

I picked up Eric's DP 1500 Z80 system at VCF West this weekend, unfortunately
the boot disk has bad sectors. Anyone have any diskettes/images around for the
1500 or any other version of their systems?

I took pics and dumped the firmware from it along with a DP 1551 pcb I've had
for a while, and have been uploading the manuals to bitsavers that came with it,
as well as a bunch that I've had scanned in the backlog




I have Catweasel images of the 2 floppies that came with my 1550 Floppy drive ( 
 alas I do not have the 1550 itself ...)

ftp://ftp.dreesen.ch/Datapoint/FloppyImage

( these are multiple catweasel  scans of the same 2 floppies )

No idea what these actually contain.


Still hoping to find documentation and floppy images on the DP2200 / DP1100 
floppy drive electronics.


Jos

Core memory single-core datasheet

[jos via cctalk]

Not that I  expect anyone to have a need for it, but just for the heck of it :

here are a few datasheets for single cores ( From a Philips Databook 1973 )

ftp://ftp.dreesen.ch/Cores/CoreMemory_core_datasheet.pdf

Enjoy..

Jos

Re: Pleas ID this IBM system....

[jos via cctalk]

On 06.04.19 16:04, jos via cctalk wrote:


The seller clearly has no idea, but the starting price is right !

https://www.ebay.de/itm/seltene-Anlage-Puma-Computer-IBM-2020/202646831828?hash=item2f2eb142d4:g:izoAAOSwhV1cpw



Jos





And so the story continues

https://ibms360.co.uk/

Re: Unknown 1970 Tapedrive

[jos via cctalk]

On 29.04.19 22:28, Chuck Guzis via cctalk wrote:

On 4/29/19 12:56 PM, Jos Dreesen via cctalk wrote:



1970, also all TTL is dated 1969 or 1970.

Jos


That would fit right in with a key-tape scheme.   Can you tell if the
capstan motor is a stepper?

--Chuck




I put up some more pics (Tapehead & capstan drive). It does not use stepper.

It seems it was made by US firm Sangamo, as is etched in some of the PCB's

In view of the head's condition I will not persue this further.


Jos

Unknown 1970 Tapedrive

[jos via cctalk]

Was given a tapedrive in rather bad condition, but it has no manufacturers name 
on it.

Pics  on ftp://ftp.dreesen.ch/Tapedrive


Anyone recognizes this ? The paddle PCB says "paddle board, 7/9 level tape 
handler."

Not even sure if it is a computer tape drive or an instrument  / data logger...


Yours if you pick it up ( and be prepared to spend quit some time to clean this 
one up. Unit has seen more this its share of water over the years)
Location : CH

Jos

Pleas ID this IBM system....

[jos via cctalk]

The seller clearly has no idea, but the starting price is right !

https://www.ebay.de/itm/seltene-Anlage-Puma-Computer-IBM-2020/202646831828?hash=item2f2eb142d4:g:izoAAOSwhV1cpw



Jos

Re: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

[jos via cctalk]

On 10.11.18 13:03, Riesen Thomas via cctalk wrote:

Hi all

Any suggestions where to find two 50Hz-Pulleys for the 8" Floppy drive
Mitsubishi M2894-63B?

If there also the appropriate ribbon gummies available, I would be very
happy.

Regards
Thomas




Thomas's floppydrive is currently on my bench : as we were unable to find the 
rights parts I proceeded to 3D print them.
A sleeve for the existing 60 Hz pulley was made from PLA, a replacement belt was printed 
using "Ninjaflex".

The resulting combination is already running for several hours, the belt is as 
flexible as the original and shows no signs of wear yet.

( This particular drive has the distinction of using a true rubber belt, not 
the reinforced textile band you normally see )

This ninjaflex  material could potentially be very useful in producing 
capstans
Experiments will follow as soon as time permits !

Jos

Pascal Microengine disks images available.

[jos via cctalk]

Finally got around to imaging the +/- 80 floppies that came with my ACI-90 
Pascal Microengine system.

Disks of general interest can be downloaded on 
ftp://ftp.dreesen.ch/WD9000/MicroEngine.zip

These are mostly variants of the OS and  a set of system  selftests.

Image  SYSTEM/OS_F0_SingleDensity.IMD might be of particular interest as that 
is a single-density OS-disk, might be needed for those with very early systems. 
All others images are for double-density systems.


Sorry for the lack of documentation, I don have anymore than this, and have yet 
to check the contents...




As a sidenote, all BASF disks were unproblematic, unlike the  ControlData and 
noname parts that were also in the mix.


Jos

Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?

[jos via cctalk]

On 26.10.18 01:16, Al Kossow via cctalk wrote:



On 10/25/18 4:00 PM, Eric Smith via cctalk wrote:


If you need a sheet-fed duplex scanner for B-size, expect to spend a pretty
good chunk of change even for a used one.



I've been through several million pages with my Panasonic KV-3065CW
duplex tabloid color scanner

They can be found used for <$500 now

https://www.ebay.com/itm/292774459578




If you are willing to go with obsolete interfaces :

my Firewire-only duplex/A3 Kodak i280 scanner was mine for 100 Euro.

Sheet feeder works OK, unit even has a inkjet printer to label scanned sheets 
wit a code.
Can fully recommend it.


Jos

Re: DG microNOVA in Cleveland on CL

[jos via cctalk]

On 04.10.2018 20:03, John Foust via cctalk wrote:


https://cleveland.craigslist.org/sys/d/data-general-free-for-good/6714121268.html




A MP/200. 16 bit CPU  built with AMD2901.
Rare beast, alas mine doesn't post. Powersupply is OK.
Lack of schematics / detailed documentations hampers progess

Jos

Cossor DIDS 400 needs saving ( Paris )

[jos via cctalk]

This link from fr.comp.ordinosaures is interesting 
http://f6aoj.ao-journal.com/crbst_752.html

Would be a shame if this really ancient videoterminal goes to waste.


As an aside : what a beautiful name the french have for there old computers : 
"ordinosaures"

Jos

Some late fifties HP measurement equipment available. ( Switzerland )

[jos via cctalk]

All,

the following late fifties HP equipment is available in Switzerland.
Stored in less than ideal conditions, but seem otherwise quite OK.

Feel free to forward to more fitting mailing list / fora.

Not my equipment, my only interest in this is saving these from the scrapheap.


HEWLETT PACKARD TIME INTERVAL UNIT 526B
HEWLETT PACKARD ELECTRONIC COUNTER 524C
HEWLETT PACKARD DIGITAL RECORDER 560A

( Possibly a second HP524(b) , unsure of this )

I will forward email adresses tio the seller, up to you to complete.
He expects to raise some money, unsure if realistic or not.


Jos Dreesen

Re: Datic 2000 / Ampex 844 Documentation ?

[jos via cctalk]

On 23.08.2018 22:50, Al Kossow via cctalk wrote:

another one

https://forum.classic-computing.org/forum/index.php?thread/13826-datic/


...which is the very machine I was looking at...

And yes, that westernDynax drive looks remarkably similar.
The 2-pcb, TTL based, controller for the drives sports "diablo 20 40" markings 
in its etch.

Alas the Datic could not be persuaded to boot.
Next task is to test the 128 socketed 2114 chips in the system.

Jos

Datic 2000 / Ampex 844 Documentation ?

[jos via cctalk]

Ran into an early CP/M system today, from german company Datic.
It is a single-user 8080 system, featuring a delay-line based CRT output and an 
Ampex 844 fixed platter / removable 14" cartridge driver.

Is this simply a Diablo 44 equivalent, as I suspect, or is this a true 
standalone development from Ampex ?

First time I have seen a 14" drive on a CP/M system

Jos  

Re: Looking for Unisoft Unix for Colex systems

[jos via cctalk]

On 10.08.2018 16:37, Al Kossow via cctalk wrote:

funky..

I have the code for the VME version that used an 80186 running DOS for an I/O 
processor
Been watching for another one for 30 years, since I never dumped the firmware 
from the 186.

Does the 68K card have a 68451 on it?




No, it is just a 8MHz MC68K, 2 PALs to somehow kludge the 68K to the STD bus, and a 2732 
marked "Unix".

PCB pics on ftp://ftp.dreesen.ch/Colex

I also added a straight binary dump of the 10MB MFM disk that is part of my 
system, but that  is a cp/m 3.0 system as it stands.
That does contain source code for the Colex 820/850 system bios.
Very few Colex system still around it seems, but if someone needs that as 
separate files then I should be able to oblige.

Jos

Looking for Unisoft Unix for Colex systems

[jos via cctalk]

Unlikely, I know, but i am looking for Unisoft UNIX fo a COLEX system


I have a Colex 850 CP/M system, with a lose STD-68000 card and some more memory 
cards.
This should support the Unisoft UNIX that once was available for this system.

Anyone has a copy of this Unisoft version ?


Jos

Datasheet for Signetics spc16/10 ( Single chip Philips P800 processor ) ?

[jos via cctalk]

Subject says it all :

anyone has datasheets for this obscure single chip Philips P800-type 
microprocessor ?

Cant find anything but a student's report from 1981, and it is not listed in 
the Signetics databooks of the time ( +/- 1980)


( this is not related to the General Automation SPC16 family)

Jos

Unknown CDC unit , looks like a drum memory ?

[jos via cctalk]

Visited an older collector recently, and in his shed he has a strange thing, 
labeled CDC, that somehow looks like a drum memory, but then again not ( drum 
looks too small to be usefull )

The controller that goes with is  a transistor based  monster on countless 
small pluginboards.

Pictures on  ftp://ftp.dreesen.ch/Unknown_CDC_Stuff


Anyone can identify this ?



Jos

Tektronix 405 diagnostic Rom Pack copies available.

[jos via cctalk]

As mentioned before , i made a functional copy of the Tektronix 4052 Diagnostic 
Rom Pack .

PCB's are back, units do work ( minus a small issue with the wrong orientation 
of the LED's )


Go to

ftp://ftp.dreesen.ch/TEK_DRP

 and find my dokumentation DiagPack_Manual.pdf , decide if this is what you 
want, and order ( or not...)

Also please read the original TEK doku TEK4052_4054_Diagnostic_Rom_Pack.pdf in 
order to understand what this unit can and cannot do.

Prices, in short : PCB only 20 Euro/25 USD, populated and tested 60/75, add 
20/25 for a fitting 3D printed casing.

And do feel free to construct your own with the data from my FTP site.

This pack should also work on the 4054, but since I do not have such a machine 
this feature is untested.


Jos, now wondering whether I will ever sell the 20 PCB's I have...

Re: radar history

[jos via cctalk]

On 03.03.2018 09:35, Paul Birkel via cctalk wrote:

On Sat, Mar 3, 2018 at 12:46 AM, Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:


I dunno about these historical accounts.




A very interesting story in this radar history is how the Dutch managed to 
rescue the EF50 tube, essential for these early radar receivers, to England 
just hours before the Germans invaded holland.

Read here ( not my site ):

http://www.dos4ever.com/EF50/EF50.html#war

Jos

Re: Tek 40xx computer users

[jos via cctalk]

On 07.01.2018 07:01, Randy Dawson via cctalk wrote:

This was for Mike Hass, he was not in the email chain, and I do not have his 
address.


But it' s a general shout out to the other Tek 40xx users out there...




There are a number of us over and the vcfed forum, someone just brought his 
4052 back to live after countless years.

I myself restored my 4052 a couple of months ago, a second one needs 
powersupply checkout and has an as yet undetermined problem in the analog board.

I am in the process of recreating the 4052/4054 diagnostic pack.
Give a shout if you need one, less than 7 parties at the moment.


I'd therefore be interested in the source code for the 3D printed cartridge 
case.
This  will need updates to accomodate the LED and switches.


I myself would be interested in obtaining, or recreating, a suitable long term 
storage option for the 4052, i.e. floppy or even SD card.

Then again, TekBasic is really bloody awful, maybe we should spend time on 
brining somre proper software top the system.


Jos

RepaIr stepper motor of an 8 inch drive ?

[jos via cctalk]

Did anyone ever succeed in repairing a stepper motor

Currently restoring a datapoint floppy drive that has been stored in a 
disastrous environment.

The head stepper has a loose wire, currently I cannot even see how to open the 
stepper motor.

It is a Warner Electric SM-024-0045-AS

Cannot see any marking as to who the druive supplier is, it might have been 
Datapoint themselves.

Jos

Re: Almost PDP 11/05 on Ebay

[jos via cctalk]

On 21.11.2017 19:25, william degnan via cctech wrote:

"DEC PDP-11 Digital BA11-KE Mounting Box"

https://www.ebay.com/itm/DEC-PDP-11-Digital-BA11-KE-Mounting-Box/28265372079

granted "all you need are the cards and the front panel" reminds me of the


Guess who has all the boards, but no backplane & power supply...

Jos, that is

Interest in copies of the TEK 4052/4054 diagnostic ROM pack ?

[jos via cctalk]

Looking into fabricating a few (functional-only) copies of the Tektronix 
diagnostis rom pack

Seems quite a few people have non-functional units...

Any interest out there ?


Jos

Re: Almost PDP 11/05 on Ebay

[jos via cctalk]

On 21.11.2017 19:25, william degnan via cctech wrote:

"DEC PDP-11 Digital BA11-KE Mounting Box"

https://www.ebay.com/itm/DEC-PDP-11-Digital-BA11-KE-Mounting-Box/28265372079

granted "all you need are the cards and the front panel" reminds me of the


Guess who has all the boards, but no backplane & power supply...

Jos, that is

TEk4052/54 Diagnostic Rom pack docu available

[jos via cctalk]

There are a few people out there struggeling with their 4052's :

On ftp.dreesen.ch/FTP/TEK4052 they will find description, schematic, pictures 
and romdumps for the Diagnostic ROM pack, as used by the TEK engineers in the 
day.

Also listed are the the TEK-supplied CRC's for all ROMS in the 4052/54 systems.

No special components used, so nothing to stop you building your own Diagnostic 
pack. If anyone does so they can contact me if they need further info.

 Jos

Tek4052 V5 ROMdumps available

[jos via cctalk]

For the upcoming VCFe in Zurich / Switzerland (18/19 Nov )  I  repaired my 
TEK4052, which is now up and running ( no usable tapes yet...)

I took the opportunity to read all the programmable devices from the machine, 
you find these at ftp.dreesen.ch/ftp/TEK4052

They are release V5 for the ALU-(microcode), and release V5.1 for the 
MAS-(firmware) board.
They do not use patch-pla's, I believe them to be the latest revision for the 
4052.
These are for the 4052, not the 4052A which is a different beast. (differnt IO 
and MAS board, different microcode and firmware )

As a reference, the romdump's at Al's site are for the 4052A, the romdumps at 
the Stuttgart museum site are the earlier release V4.x for the 4052

Take note : a 4052 does not boot without the tapedrive attached...

I also dumped the contents of both 2716's onboard the diagnostic rom pack. ( 
also containg a 6810 )

I have (untested) spare boards if anyone in the neighboorhood wants to try some 
boardswapping...


Jos

Diablo 31 air filters / plugs ?

[jos via cctalk]

Looks like another computer will be joining the stable shortly, containing a 
Diablo 31 drive.

From the manual it looks that it does not need heads to be locked down for 
transport, so I should be save there.

But since i will need to fabricate cables : are connector plugs still 
obtainable ?
And what are people using for air filters these days ?



Jos

Re: ICL 1501 terminal available in Sweden.

[jos via cctalk]

Hi Mattis,


I am certainly interested, but Sweden is big
Where about are they ? What kind of money is he looking for ?



Best regards, Jos Dreesen




/Mattis

Re: Micral N (1974) for sale

[jos via cctalk]

On 01.06.2017 06:35, Sam O'nella via cctalk wrote:

That's a starting bid at 20,000 euros?
 Original message From: Stéphane Tsacas via cctalk 
 Date: 5/30/17  5:56 PM  (GMT-06:00)Subject: Micral N 
(1974) for sale
If it happens you're in Tours (in France, https://goo.gl/maps/BXNZ4YJixYq)
June 11 2017, a Micral N from 1974 will be auctioned.
More info -- in French -- on the auction house website
https://www.rouillac.com/fr/news-1252-le_micral_n_premier_micro_ordinateur

Starting price : 20 K€.

Good luck ;-)


They do claim that it is the only one in a private collection. So yes, will be 
interesting...

Jos