PCP11E Qbus board

This board has a z80, a bit of memory, 2 Zilog 8420 Parallel I/O chips and a Counter Timer, Z80 CTC I/O chip.  40 pin connector off the edge to some sort of device.

AM9016EPC chips make up 16K of ram

DEC 19-13040-00 DC005 Transceiver logic chips are at U5,7,8,9, and 10

ECO applied to one of the Transceiver logic chips (U10) (pin 15)  Appears to go to one of the switch U7 positions.

DEC 19-12730-00 DC003 Interrupt logic chip is at U3

Dec Chip reference is here on Bitsavers CHIPKIT

Below are pictures of the overall board front and back, then various features

Reference information links

Olivetti Programma 101

http://www.retrocomputing.net/parts/olivetti/programma101/docs/service/

PDP 8, 11, etc. Kerten site.

http://dustyoldcomputers.com/pdp-common/reference/drawings/cpus/pdp8a.html

PDP 8/A system chassis

PDP 8/A 400 BP system chassis.

Krten PDP 8/A reference page  PDP8A

System configuration from DEC

System box with G8018 M840 plus Autotech board (unmarked)

M840 and Autotech board pull tab legends

Autotech etch etch side legend in etch

Unmarked autotech board

Left side of autotech board, IC markings removed

Right side of Autotech board, IC legends removed

Closeup showing ICs left side

center of boards showing ICs with legends removed

right side ICs Autotech board

Chassis backplane, quad sections on top, hex middle, quad bottom

cables for paper tape reader punch M840 board

System Badge 8A400 BP

PDP8/A system boards

M8315, M8316, and M8317

G850 16K memory H219B
G849 8K memory H219A

Doug Jones Info on 8A  PDP8A

Programmers Front Panel

Logo, ADDR display

End of rear of front panel

Connection to system cag

Front Panel Service Tag

M8317

M8317 option switches

M8315

M8315 Option switches

M8316

M8316 option (presumably baud rate)

16K core

8K core

HP ET-4382 Diode test set

It is a "minimum system" scope, w/ the classic "octopus" circuit built-in, and it is factory made.  I don't know if they used it internally only or it was a public offering.

The octopus is a short form, minimalist, simple curve tracer.  But it is incredibly effective for Q & D bench work.  All you need is a filament transformer, 3 resistors IIRC and a scope set for X-Y mode.

The Navy OS-8 scope has the same built-in w/ jacks on the panel for such testing diodes, transistors and junctions.
ET-4382 Diode Test Set


Testing a Diode






Internals


Schematic

Wang 320K Calculator Head (nixie display, and keyboard only)

This is the head to a Wang 320K calculator.  It is only a couple of circuit boards which has two circuit boards which have the keyboard, and the Nixie display tubes attached.

The head to electronics cable is missing.

Main view

Nixie Tubes

Nixie Display

Los Alamos Scientific Laboratory

Los Alamos National Laboratories was LASL prior to being renamed and repurposed.

Nixie display tubes

Nixie Display Tubes

Wang Laboratories 320K

Service TAg

Service tag inside bottom cover

Bottom Cover with product sticker (missing feet)

Display board (bottom), Keyboard (top)

Open connector would have had a cable to go to the electronics unit.  Frequently one calculator electronics module would have several of these heads attached with multi user capability.

I don't know that this one was programmable, it may be a simpler model.  Some had card readers which would read statically a single Hollerith card punched on a keypunch to load a program.