Re: Microassembler, etc, available

2017-11-28 Thread Noel Chiappa via cctalk 
On 11/28/17 13:27, emanuel stiebler via cctalk wrote:

> Dave has a KV10 already in verilog, so why not port it to the uengine?

Well, the uengine would have to be considerably modified before it could be
used for a PDP-10 (e.g. wider data-paths); this version is very specialized
to the SD application (e.g. hardware CRC support, etc).

Noel

Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?

2017-11-28 Thread Paul Berger via cctalk 



On 2017-11-28 7:11 PM, Brent Hilpert via cctalk wrote:

On 2017-Nov-28, at 2:54 PM, Fred Cisin via cctalk wrote:

On Tue, 28 Nov 2017, Brent Hilpert via cctalk wrote:

I couldn't find the ebay listing for the NCR modem for some reason, either 
using the number or by searching by keywords.

https://www.ebay.com/itm/132411929563


That works . . . forgot about composing the URL directly from the item number.

Still won't show up with regular searches on ebay.com , although these do with "ncr 
acoustic":

https://www.ebay.com/itm/NEW-ACOUSTIC-REVIVE-RTP-4-absolute-Power-supply-box-outlet-From-JP-with-tracking/252956939311?hash=item3ae568942f:g:YAgAAOSwJH1ZJosl
Latest audiophool scam.

Wow and only $2512.99 what a deal!

Re: TRS80 Model 4P CRT contrast fail

2017-11-28 Thread Adrian Graham via cctalk 
> On 26 Nov 2017, at 21:06, Adrian Graham  wrote:
> 
> I replied to this thread a while back but managed to only reply to Tony and 
> not the list, oops! Rather than using my multi-transistor tester for TR103 I 
> tested it with a DMM in diode mode and it’s almost a dead short from B-E, I 
> get the same reading in both directions so I’m going to order a new one in a 
> bit.

Replying to myself here but to my surprise the replacement 2SC2228 arrived 
today and the machine is running nicely now, albeit with some screen wobble. I 
also tested the replacement in my transistor tester and it was correctly 
identified as a BJT NPN so I should’ve questioned it at the beginning but hey. 
Live and learn.

It’s currently running the built-in RAM test which is a lot more than it’s done 
for the last 15 years :)

Cheers folks!

> —
> Adrian/Witchy
> Binary Dinosaurs - Celebrating Computing History from 1972 onwards
>

Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?

2017-11-28 Thread Brent Hilpert via cctalk 
On 2017-Nov-28, at 2:54 PM, Fred Cisin via cctalk wrote:
> On Tue, 28 Nov 2017, Brent Hilpert via cctalk wrote:
>> I couldn't find the ebay listing for the NCR modem for some reason, either 
>> using the number or by searching by keywords.
> 
> https://www.ebay.com/itm/132411929563


That works . . . forgot about composing the URL directly from the item number.

Still won't show up with regular searches on ebay.com , although these do with 
"ncr acoustic":

https://www.ebay.com/itm/NEW-ACOUSTIC-REVIVE-RTP-4-absolute-Power-supply-box-outlet-From-JP-with-tracking/252956939311?hash=item3ae568942f:g:YAgAAOSwJH1ZJosl
Latest audiophool scam.

Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?

2017-11-28 Thread Santo Nucifora via cctalk 
On Tue, Nov 28, 2017 at 3:58 PM, Brent Hilpert via cctalk <
cctalk@classiccmp.org> wrote:

>
> Thanks for the additional datapoint.
> It does suggest Model A production may likely have started in 1968.
> Actual date codes in mine were 6908 to 7008.
> The larger caps are also a good place to look for date codes.
>
> I did the schematic, if you have an interest.
> Eventually I'll get a little web article up for the model.
>
>
For the record, I'm not sure what model I have as the deteriorated foam
from the top cover fell and stuck to the Livermore label between the two
cups and clean up wiped off most of the info.  Mine has a Motorola MC836P
IC on the middle board that has a date code of 7206.

Re: Livermore Data Systems / was Re: what is this NCR modem? what did it go to?

2017-11-28 Thread Brent Hilpert via cctalk 
On 2017-Nov-27, at 5:25 PM, steve shumaker via cctalk wrote:
> On 11/27/2017 2:26 PM, Fred Cisin via cctalk wrote:
 The Livermore Data Systems modems that I sold off were from about 1964?
>> 
>> On Mon, 27 Nov 2017, Brent Hilpert via cctalk wrote:
>>> Were those the Livermore Data Systems modems in a wood box you were selling?
>>> Did you have anything to ascertain the 1964 date for LDS, or were you 
>>> getting that date from the stuff on the web?
>> . . .
>>> Someone in some comments suggests LDS wasn't building these until 1968, 
>>> which strikes me as more plausible.
>> 
>> Thank you!
>> 
>> That is why I put a question mark after 1964.
>> I was basing it on nothing more than verbal comment by the guy that I got 
>> them from.   And, while I had them, I hadn't had any reason to particularly 
>> care.
>> 
>> 1968 does, indeed, seem more plausible.
>> 
>> It still serves to illustrate that 1971 is NOT too early for that NCR.
>> 
>> -- 
>> Grumpy Ol' Fred ci...@xenosoft.com
>> 
> I can add another data point to the discussion:
> 
> My LDS Model A with SN 0491 has two TI transistors both with data code "6914"
> 
> And for what it's worth, if you have one and have never opened it up, go do 
> so right now!The three small circuit boards have a 3"x4" piece of the 
> infamous black foam to pad the cards when inserted in the case.  Of course 
> the foam is mostly gone now except for where it wraps around the cards and 
> corrodes the components that it touches!


Thanks for the additional datapoint.
It does suggest Model A production may likely have started in 1968.
Actual date codes in mine were 6908 to 7008.
The larger caps are also a good place to look for date codes.

I did the schematic, if you have an interest.
Eventually I'll get a little web article up for the model.


I couldn't find the ebay listing for the NCR modem for some reason, either 
using the number or by searching by keywords.

Parts for old RS/6000's

2017-11-28 Thread Benjamin Huntsman via cctalk 
Anyone on here have any old RS/6000 parts?  I have an old C10 I'm trying to 
beef up a bit for a project.  I'm after the following (pardon the lame table):


FC FRU Qty Desc
3033 74G8824 2 2.2GB SCSI-2 Fast/Wide Disk Drive
4012 9H5583 8 32MB SIMM Memory
4224 02G7431 1 Ethernet 10BaseT Transceiver
3107 31G4126 1 Serial Port Converter Cable D/T 7008,7009
51G7737 1 System Unit SCSI Terminator


Also interested in some MCA blanks, if anyone has some extras lying around.

Thanks!

Re: Sun 3/50 processor board and unknown processor

2017-11-28 Thread Ian Finder via cctalk 
The second board is clearly out of a ComputerVision CADDstation.

On Tue, Nov 21, 2017 at 4:38 AM, Camiel Vanderhoeven via cctalk <
cctalk@classiccmp.org> wrote:

> On 11/21/17, 3:40 AM, "cctalk on behalf of Charles Dickman via cctalk"
>  wrote:
>
>
> >It looks like board 2 is for a Sun 3/50 workstation. Board 1 is some
> >kind of micro-programmed processor based on AM29331 and AM29331. There
> >are also some Analog Devices DSPs.
> >
> >AM29000 based processor with Analog Device DSPs
> >http://www.chdickman.com/board1.jpg
>
> In the bottom right hand corner, above ³COMPONENT SIDE², there is some
> lettering that seems to read ³COMPUTER Š BEDFORD MA². Given the DSP¹s, the
> MITRE corporation comes to mind. This might have been part of some
> military or civil aviation signal processing system.
>
> Camiel
>
>
>


-- 
   Ian Finder
   (206) 395-MIPS
   ian.fin...@gmail.com

Re: Microassembler, etc, available

2017-11-28 Thread emanuel stiebler via cctalk 

On 2017-11-28 08:54, Noel Chiappa via cctalk wrote:


and the whole thing is here:

   https://github.com/dabridgham/QSIC

including the Verilog for the uengine. Dave reports that it should be easy to
adapt his uengine design to other uses, it should run in pretty much any
FPGA. So if you want to build a PDP-15 (or a Multics! :-) in an FPGA, there
you go. Dave indicates he'd be happy to help anyone who needs to tweak the
uengine design for their particular application.


Hopefully someone will find this useful!


Dave has a KV10 already in verilog, so why not port it to the uengine?
;-)