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My Machines
PDP-8/E Rebuild – Part 1 – Strip Down
A new arrival in my collection was a fairly clean PDP-8/E chassis. The box came with no cards but I have sufficient spares to populate. First step in rebuilding it is to strip it down and remove all the foam gunk before moving onto reviving the power supply. Join DiscussionPDP-8’s for sale
I’ve decided to sell of a few PDP-8’s as the hoard is getting rather large at the moment and so I’m prepared to part with the following:
PDP-8/M, 8KW core, M8650 serial UART, very clean machine in working order. This machine is currently listed on ebay here: http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=320762438517&ssPageName=STRK:MESE:IT
PDP-8/E, 4KW core, M8650 UART, requires a full rebuild
PDP-8/A,… »
Inventory: Flipchips
This is an inventory of flipchips in my collection:
M050 – 50mA indicator and relay driver
M100 x 2 – Bus data interface
M107 x 6 – Device selector PDP-8, Non Omnibus
M113 x 15 – 2-input NAND gates (x10)
M137 x 4 – high speed 4-input power NAND Gates
M139 x 4 – 8-input NAND gate (x3) (pinout different from M119)
M141 x4 – AND/NOR… »
PDP-8/M (number 2) returns to life
My second PDP-8/M is just about back in the land of the living. I followed largely the same process as with the restoration of my first 8/M. Luckily this examples case wasn’t corroded and so I didn’t bother respraying and left it in original condition.
The main sticking point with getting this machine back was a… »
INVENTORY: OMNIBUS spares
Here are a list of my spare OMNIBUS cards:
G104 MM8E 4K Memory sense/inhibit
G227 MM8E Memory X/Y drivers
H212 MM8EJ 8K Memory stack
M837 KM8E Extended Memory and Time Share Control
M8300 KK8E Major registers (x4)
M8310 KK8E Major register control (x4)
M8319 KL8A PDP-8/A 4 channel serial I/O
M8320 KK8E Bus loads (x6)
M8321 TM8E Magtape output control module
M8322 TM8E Magtape control… »
New Haul: PDP-8/L and PDP-8/E
A couple of new machines have joined my stable, a very clean PDP-8/L and another PDP-8/E.
The /L is complete with the (somewhat important) exception of its core stack which has been lost at some point. If anyone has or knows the whereabouts of a spare stack (I believe they were common to the /I and… »
H960 rebuild
My PDP-8s have finally got a new home in the form of a very rusty H960 that I recovered in my recent haul. Before fitting my -8s into it I decided to strip and respray to bring it back to its former glory.
Here are the steps I went through to achieve this:
Thoroughly wire brushed all rusty… »
Join DiscussionInside the 990
Whilst the CPU and memory cards are missing, some cards remain within my 990. Here are details of what is left:
Unmarked card
TRACE – Unknown function
CRT – An interface to a TI terminal?
FLOPPY – Interface to 8″ floppy drives
EIA – Serial card
PROM – Some kind of… »
New Arrivals – TI 990/4 and some Prime remnants
When I went to pick up a PDP-8 this week I also discovered in a fairly dismantled state a TI 990/4 mini computer and the rack, PSUs and disk of a Prime (model not known).
The TI 990/4 is in fairly good condition (despite having been rained on for the last week) although it is missing… »
My Model 74
A few years ago I was given a PDP-11/34a. When I went to pick the machine up, the owner also offered me an Interdata Model 74. I snapped this up immediately as it was such a beautiful little machine. Join Discussion