[PDP8-Lovers] *** Possible Rare DEC Cards Available ***

From: Robert Lash <boblash_at_slip.net>
Date: Mon May 10 23:02:25 1999

Hi! Some of these flip-chips are listed in my copy of the Digital Logic
Handbook (1970 Edition)... in addition to the information below, if you
need pinout information I can make some scans... :)

> W103

PDP-8 Device Selector.

 "This module is used to decode the six device selector bits transmitted
in complement pairs on the PDP-8 or PDP-8/S I/O bus, and it provides
standard pulses to the selected device. The device code is selected by
cutting one diode of each pair, BE or BF, etc. off the board. Device
coding can also be accomplished by selective wiring of the bus inputs to
the diode pairs. Power: +10V (A)/6.4 mA; -15V (B)/57 mA. (New list price
was $52 in 1970!!)

Below are details on the other modules listed in this handbook:

> All cards listed are in neither the DEC field guide or Doug Jones' Omnibus
> module guide.
>
> Here's the list:
>
...

> M051

The M051 (Level Converter) contains 12 level converters to shift K and M
series logic levels to negative logic levels of ground and -3 volts.

> M111

The M111 inverter consists of 16 TTL inverters.

> M113

The M113 consists of 10 2-input TTL NAND gates.

> M206

The M206 is a hex D flip-flop.

> M302

This is a negative edge-triggered Dual Delay Multivibrator, which is
adjustable from 50 nsec to 7.5 msec using it's internal capacitors.

> M506

This is a Negative Input Converter for interfacing negative logic levels
to M and K series logic. It consists of six non-inverting converters.

> M624

The M624 provides 15 TTL bus drivers for driving PDP-8/I or PDP-8/L's that
use positive input busses. These also contained gating to support Program
Interrupt, I/O Skip, and Clear AC functions.

> R002

Diode network for expanding inputs of R, W, and A series modules.

> R205

Dual flip-flop. Requires +10 and -15V supplies.

> R405

Crystal clock (frequency should be stamped on the can).

> R650

Dual inverting bus driver for high-current loads.

> W640

This is a pulse output converter for use with "Digital Laboratory and
System Modules".

> W707

Teletype transmitter.


Hope this helps!


Best wishes,


Bob Lash
bob_at_bambi.net

-------------------------------------------

On Mon, 10 May 1999, Kevin McQuiggin wrote:

> From: Kevin McQuiggin <mcquiggi_at_sfu.ca>
>
> Hi Gang:
>
> I'm on a semi-yearly business trip to Ottawa, Ontario. I stopped in this
> evening at the friendly local computer recycler. Looks like I might have
> hit a jackpot in regard to many pounds of old DEC cards.
>
> These are of the "Flip Chip" variety, and if I recollect correctly, they
> may be cards from a STRAIGHT 8!!!!!
>
> The machine is nowhere in sight, as they are a scrap metal place it was
> like chopped up over the last couple of weeks.
>
> Here is a list of the cards. Those in the know, can you advise me and
> others whether these are of interest. I had the owner put the box aside
> until I call him back.
>
> Total is about 30 pounds of cards. The list contains a sample only. There
> are, in some cases, 5-6 cards of each type. There are some Q bus and Unibus
> cards listed too, can you identify them?
>
> All cards listed are in neither the DEC field guide or Doug Jones' Omnibus
> module guide.
>
> Here's the list:
>
> B014
> G180
> G208
> G603
> G808
> G808
> G938
> M051
> M111
> M113
> M206
> M302
> M3106 4 LINE MUX
> M3118YA
> M3118YA
> M506
> M506
> M624
> M7164
> M7270 LSI-11/02 CPU
> M7608 2-4 MB RAM
> M7819 8 PORT SERIAL I/O
> M7942 VT72 BOOT
> M7946 RX01 CONTROLLER
> M8029 RX02 CONTROLLER
> M8029 RX02 CONTROLLER
> M8203 RS449 WITH MODEM
> M8956
> M8956
> M8957
> M8957
> R002
> R205
> R210
> R210
> R211
> R220
> R220
> R405
> R650
> R650
> S111
> S181
> S202
> S203
> S603
> W026
> W103
> W640
> W707
> W998
>
> If these cards are indeed rare, or of value to anybody on the list, LET ME
> KNOW OVER THE NEXT COUPLE OF DAYS, so I can pick them up and hold them for
> you, for shipping and my out-of-pocket costs, of course.
>
> Please post to the list, and email me directly,
>
> Kevin
>
>
>
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Received on Mon May 10 1999 - 23:02:25 BST

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