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.
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
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
> 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
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
> 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
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
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
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
