test-drb

test-drb@ccmp.vtda.org

101090 discussions

by aek＠bitsavers.org

Has anyone seen a source for these clips? http://bitsavers.org/mysteries/salea_clip.JPG They come with the Salae logic analyzer, and are like the HP logic analyzer clips in that the wire is detachable, instead of the common style you can buy where you have to solder on a wire.

7 years, 9 months

source for smt probe clip

by cclist＠sydex.com

On 10/27/18 4:51 PM, corey cohen wrote: > >> On Oct 27, 2018, at 7:42 PM, Chuck Guzis via cctalk <cctalk at classiccmp.org> wrote: >> >>> On 10/27/18 4:19 PM, Al Kossow via cctalk wrote: >>> Has anyone seen a source for these clips? >>> >>> http://bitsavers.org/mysteries/salea_clip.JPG >>> >>> They come with the Salae logic analyzer, and are like the HP logic analyzer clips >>> in that the wire is detachable, instead of the common style you can buy >>> where you have to solder on a wire. >> >> Pomona 5790? >> >> > > I thought I saw some that would work at Halted/HSC in Santa Clara this past week. They were right across from the counter where you pay. > There's also these "micrograbber" clips at All Electronics for $2 the each: https://www.allelectronics.com/item/mtc-9b/micrograbber-test-clip-w/0.64mm-… I don't like them as much as the Pomonas--the cheapies use only a single contact, rather than the "pincer" style of the Pomona. --Chuck

7 years, 9 months

FP11-A Technical Manual

by jnc＠mercury.lcs.mit.edu

So, I bought a copy of the FP11-A Technical Manual (EK-FP11A-TM), but when it got here, it was the 'Preliminary' version (-PRE), with type-written text, some of the figures are hand-drawn, etc. This manual does not seem to be generally available online, although at one point a copy was available for download briefly; although it's not the greatest scan job, I have put it up here: http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/dload/EK-FP11A-TM-002.pdf So, is it worth my scanning the -PRE version, or should I just punt, and we'll go with that scan of the -002? Noel

7 years, 9 months

PinOut of DEC F11 Chips in a Professional 350

by jnc＠mercury.lcs.mit.edu

> From: Rob Jarratt > The chips where I believe the RESET is oscillating on pin 23 have been > labelled E151 and E152 ... But I am not really sure if I have > identified them and the pin correctly. E151 is the main CPU chip: http://gunkies.org/wiki/F-11_chip_set E152 is the KEF11-A floating point chip, and E150 is the KTF11-A memory management chip. Pin 1 of E150 is definitely in the lower left corner (in the photo); there's an indent on the left-hand side of the chip, for the usual DIP orientation. I'm pretty sure the other two have the same orientation. Noel

7 years, 9 months

PDP-8 screws

by wdonzelli＠gmail.com

One the original PDP-8 ("Straight 8"), the front panel has two aluminum strips on the sides, one on the left and one on the right. Each should have a pair of flathead countersunk screws, likwly Phillips head. Can someone tell me the exact specs, basically thread, length, head, and material of the screws? Thank you. -- Will

7 years, 9 months

PinOut of DEC F11 Chips in a Professional 350

by jnc＠mercury.lcs.mit.edu

> I'm pretty sure the other two have the same orientation. They do; I looked at the KDF11-A prints in the /23 print set, and then looked at an actual /23. (I should put a hi-res picture of one on the CHWiki page; the one that's there is pretty miserable.) Noel

7 years, 9 months

TRS-80 Model I modification

by bill.gunshannon＠hotmail.com

Does anyone have a description of how to put 48K of memory in the TRS-80 Model I without using an Expansion Interface?? I seem to remember there being some published back in the old days but can't find anything on the web.? I think it was done with 4164's and a few pieces of wire wrap wire to jumper the missing address lines. bill

7 years, 9 months

PinOut of DEC F11 Chips in a Professional 350

by robert.jarratt＠ntlworld.com

As I mentioned in an earlier thread, I am trying to repair a DEC Professional 350 system board. I think I know the pinout of the F11 chips >from a KDF11-A printset, can anyone confirm that pin 23 of the DIL package is the RESET signal? If that is correct then it is oscillating and resetting the machine constantly. I am trying to trace the source, but it seems to go through quite a few chips and I haven't yet traced its source. The chips where I believe the RESET is oscillating on pin 23 have been labelled E151 and E152 in the following photo: https://rjarratt.files.wordpress.com/2018/10/system-board-labelled.jpg But I am not really sure if I have identified them and the pin correctly. Thanks Rob

7 years, 9 months

70's computers

by jnc＠mercury.lcs.mit.edu

PS: > Not the simplest machine to implement, mind - the -8 is a lot > simpler. As a rough measure of how much more complex, the -8/E and -11/20 are roughly contemporaneous, and built out of the same technology (SSI TTL on larger boards): the -8/E CPU is 5 quad boards, and the -11/20 CPU is 9 quad board (equivalents - some are duals, etc). Noel

7 years, 9 months

DAT tapes anyone?

by db＠db.net

I rescued a pile of DAT and a drive from scrap locally. I have no use for it. I'd rather not ship :-( but I am two hours drive from Montreal 4.5-5 hours from Toronto here in Ottawa. Anyone want this box? Diane -- - db at FreeBSD.org db at db.net http://artemis.db.net/~db

7 years, 9 months

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