test-drb December 2010

test-drb@ccmp.vtda.org

154 participants
208 discussions

FYI: Soroc IQ 120 terminal manuals now on bitsavers

by legalize＠xmission.com

I just noticed this, but Al added them on Nov. 25th. <http://bitsavers.org/pdf/soroc/IQ_120_Operators_Manual.pdf> <http://bitsavers.org/pdf/soroc/IQ_120_Theory_of_Operation.pdf> Theory of Operation has all the schematics, parts lists, etc., that you would need in order to repair one of these puppies. I have one with a slightly damaged case that will need some refurbishing/checkout before I turn it on. Thanks, Al! -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

14 years

Tektronix graphics, NASA and FORTRAN‏

by rdawson16＠hotmail.com

Hi Gang, While surfing, I found a repository of NASA FORTRAN code from the NASA-COSMIC library. Lots of graphics in here as you could imagine, supporting Tektronix, PLOT10 and VT100 graphics terminals. As I know there are lots of geeks here, like me still interested in this sort of stuff. I have attached a abstract list of the code. Let me know if you are interested in any of this - it certainly has application or useful as learning material; for example the calculation of satellite trajectories for us AMSAT ham guys. You can certainly Google yourself, but the download for me was a bit tricky - requiring a linux box and the Subversion version control system. How can I push it up to Bitsavers? Randy

14 years

Slashing the letter O (Was: Re: Service bureaus (Was: Tek 4051 firmware listing))

by derschjo＠mail.msu.edu

Interestingly enough, the Sharp PC-1211 (early basic programmable calculator) displays 'O' in a manner similar to what you describe. Zeros have no slash or other markings, but the 'O' has a notch in the upper right corner. See http://www.vintagecalculators.com/assets/images/SharpPC1211_1.jpg for an example. Josh -----Original Message----- From: Al Kossow Sent: Thursday, December 16, 2010 2:52 PM To: cctalk at classiccmp.org Subject: Slashing the letter O (Was: Re: Service bureaus (Was: Tek 4051 firmware listing)) There was an attempt at establishing what can roughly be described as an upside down Q for a slashed O. The only example I know of where someone used this are in line printer listings >from SDS in the late 60's. I would have to do some serious digging in magazines to find who was pushing this as a standard. They end up looking like misformed 8's. It does terrible things to OCR.

14 years

When did RSTS/E get networking?

by legalize＠xmission.com

Either as an option from DEC or built-in. Which version? -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

14 years

Free to good home: Ultra 1 and Ultra 5 (Montreal, McGill)

by joachim.thiemann＠gmail.com

Hi everybody, I have two Sun UltraSPARC machined to be picked up: a Ultra 1 (512 M RAM, with extra memory modules) and an Ultra 5 (also 512 M RAM). The 5 works for sure, runs NetBSD. These are for pick-up at McGill University in Montreal, contact me off-list if you want them. There might be a SS4 kicking around here as well to be gotten rid of. Contact me off-list. Joe. -- Joachim Thiemann :: http://www.tsp.ece.mcgill.ca/~jthiem

14 years

apple Lisa2. One working!! - one to go?

by dm561＠torfree.net

Date: Tue, 14 Dec 2010 00:05:05 -0200 From: "Alexandre Souza - Listas" <pu1bzz.listas at gmail.com> Subject: Re: apple Lisa2. One working!! - one to go? > An example to ilustrate the talk: http://tabalabs.com.br/c64/sx > +++++++++++++++++++++++++++++++++++++++++++++++ > > Definitely interesting and somewhat relevant, but not quite the same > thing; that deals with the common problem of replacing 24pin 8K 23xx type > ROMs (or 68764/66 EPROMs) with a 27xx equivalent EPROM (with multiple > images in this example), whereas Tony was talking about replacing a 2716 > with a larger 27xx EPROM, not quite the same thing or adapter. Thanks Mike, but please, read again: > An example to ILUSTRATE the talk: http://tabalabs.com.br/c64/sx +++++++++++++++++++++++++++++++++++++++++++++++++ I've read it again, and I'd still say that although it's somewhat relevant it's not what Tony was talking about. Although the pictures and schematic illustrate the general idea of (badly) making this *kind of* adapter (try reprogramming that EPROM ;-), I think it would have been more useful to link to an illustration and schematic of what Tony was actually talking about, i.e. adapting a 2716 (instead of a 2364). You can buy those adapters for $5.00, by the way. Am I missing something?

14 years

Unknown TI logic series

by tshoppa＠wmata.com

Brent wrote: > On 2010 Dec 10, at 2:36 AM, Christian Corti wrote: > > > > we've had a look inside our IME 122 calculator and discovered that it > > is full of SN14xx logic ICs. They are mainly from TI, but there are > > also some from Motorola and others. It seems that they have the same > > function and pinout as the SN74xx parts but there must be a difference > > since the machine has quite a lot of SN1401 (the SN7401 is a quad > > open-collector NAND), but there are no pullup resistors anywhere! > > Some of the types are SN1400, SN1401, SN1474, SN1490; the ALU is made > > up > > of SN1482 and SN1483. > > Anyone knows this series? BTW the supply voltage is 5V. > I can't find a reference for those numbers, and I haven't seen them > before, however I have seen TI inexplicably producing series identical > or similar to more-common series, but numbered differently. For > example, the SN3900 and SN4500 series are very similar to more-common > DTL series such as the 700/800/900 series, but I have never seen a > reference for the 3900 or 4500 series in TI databooks. One suggestion > might be they were a 'consumer-grade' series, a step below the standard > commercial-grade stuff. Remember this was the late 60's or early 70's, and the thought of 7400 as the "super series" with variants like 74L00, 74H00, 74S00 actually being inside the family had not quite taken over in the same sense that it did later, even inside TI. I don't think it's so much that the SN1400's/SN3900's/SN4500's were a step below commercial grade, but they probably had product-specific fanin/fanout/noise/current constraints and maybe even custom pinouts or built-in pullup variants in their specs. The 7400 "super series" of pin compatible parts in different speed/current/fanout levels organized by 74L00, 74H00, 74S00, 74LS00 with often identical pinouts was truly genius from a marketing-meets-technology point of view. Not too different than say the 9-pin dual triode with similar to identical pinouts but different gain variants (e.g. 12AU7/12AT7/12AX7) and a zillion commercial/aerospace/computer variants (e.g. 5814A, 5963, etc.) With regards to pinouts not everyone even inside a company had the same thoughts regarding pin locations for Vcc and gnd. TI did a pretty good job most of the time putting them at 7 and 14 or 8 and 16 for TTL which did simplify layout, but there are lots of exceptions even inside the TTL product space. And sometimes there were good reasons for the exceptions, other times I think it was just internal squabbling :-) You can see some of this playing out in TI's competitors logic families too, e.g. Signetics Utilogic with different subfamilies inside the Utilogic superfamily. Tim.

14 years

apple Lisa2. One working!! - one to go?

by dm561＠torfree.net

Date: Sun, 12 Dec 2010 20:32:00 -0200 From: "Alexandre Souza - Listas" <pu1bzz.listas at gmail.com> Subject: Re: apple Lisa2. One working!! - one to go? > However, it's also quite easy to use a 2764 in place of a 2716 in the > actual machine. What I normally do is make an adapter that will plug into > the oriignal EPPROM socket and will tkae the 2764. Most pins just > connect across, you need to connect the higher address lines on the EPROM > to ground (do this on the adapter, of course). Then program the ROM image > into the first section of the larger EPROM, and it should work fine. An example to ilustrate the talk: http://tabalabs.com.br/c64/sx +++++++++++++++++++++++++++++++++++++++++++++++ Definitely interesting and somewhat relevant, but not quite the same thing; that deals with the common problem of replacing 24pin 8K 23xx type ROMs (or 68764/66 EPROMs) with a 27xx equivalent EPROM (with multiple images in this example), whereas Tony was talking about replacing a 2716 with a larger 27xx EPROM, not quite the same thing or adapter. mike

14 years

68k s-100 board was [Re Decent Motorola 68000 - 68010 book]

by lynchaj＠yahoo.com

Andrew, The douglasgoodall website required a log in before viewing. Status posted anywhere else? Thanks Rob -----REPLY----- Hi You can check the N8VEM wiki for schematics, PCB layout, and parts list. http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder <http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder&param=S-100%2068K%20 CPU> &param=S-100%2068K%20CPU Otherwise the status of the S-100 68K CPU board is we've got a team of builders schematic captured & reviewed PCB layout done and verified 5 PCB prototypes ordered prototype PCBs sent to builders lead builder is currently doing build and test project wiki set up various pieces of TUTOR 1.3 software gathered We are not done with build and test. No ETA. There are some minor changes and items found so far but nothing of consequence. No cuts and jumpers identified for the board. After prototype build and test is done, we are going to focus on the software. Probably custom test/debug/monitor EPROMs first, then TUTOR 1.3 with a goal of CP/M 68K (maybe) The plan is the PCBs will be available for $20 each plus shipping. They are for educational purposes only. No kits or pre-built boards. There is no ETA for the manufactured PCBs. That's about it. Thanks and have a nice day! Andrew Lynch

14 years

Looking For MicroVMS Pre 4.6

by robert.jarratt＠ntlworld.com

Does anyone have any MicroVMS versions pre version 4.6? I'd love to find a version 4.1 if anyone has it. Regards Rob

14 years

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test-drb December 2010