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We were having a clear out at the office and came across several reels of punched paper tape, used to store some code for use on a DEC-PDP11 minicomputer (1970s vintage)
You can read about punched tape here:
en.wikipedia.org/wiki/Punch_tape
Punched tape has actually been around for a long time - since the 1840s when it was connected with telegraph messaging.
As a rough estimate if we assume one byte per row of holes then this image (size of 631KB) would require roughly 1200 kilometres of punched tape.
For more information about The National Museum of Computing , visit www.tnmoc.org
Please take a look at www.retrocomputers.eu for more info about my retro computer collection.
Cards are as follows:
General Atomic-8 455-0500-2 Rev. T
027-0025-0C Rev C
0455-0600-03 Rev N
Custom TALLY Card
DEC M7892 Tape Controller
(These cards are no longer available)
Switch Mode Power Supplies were booming back then.
Stood in front of ATE 2, a in house build, made for testing 30W to 110W SMPS. Electronic 5 channel load, ripple, noise and timing measurement, variable AC and DC injector supplies all in one 19" rack. Controlled from a Commodore PET over IEEE-488.
We had several ATE (Automatic Test Machines). The first was probably 3H which was controlled by a DEC PDP11. Which used 8 inch floppy disks! I dread to think how that was scrapped in the end. The last (up until I left) was controlled by an Acorn Archimedes. Ah happy days (Probably hell back in the day).
Paul Rainer
Steve Osborne
Sue Mcnamara
Sarah (surname anyone?)
Robin Brown
Nick Norton
Who is the girl on the right?
LEFT TO RIGHT: DEC M7270 (SOLD) ; Terak 900007 -- Double Sided I/O Board UART Floppy Controller ; MMS 1122N3032 Rev D ; 6805-00168-0033 Rev H
Who knew RadioShack made a data terminal? Never see one these before I got this in a shipment of PDP-11s that I bought back in 2002
The Arselars we removed in the Great Upgrade of 2002 get put in the junk pile (along with some Indys Neal's been hoarding).
The Arselars* (or Pisspots**) used to be our core switches.
* actually, they were called Accelars but the only thing they accelerated was the speed at which the network crashed
** Nortel rebranded them as Passports
A classic! When he saw this, dad started waxing lyrical about the olden days when he used to stoke the boiler on one of these. This particular machine retired to BP from the Atomic Weapons Establishment seismology lab at Blacknest.
The paper in Bay City, MI, is still running a PDP11 to handle their classified advertising. Go figure. Yup, the whole thing takes up five racks.
[SOLD] Markings are as follows:
TALLY GSC2T63 F1873
604029-1 604028- ASSY
A custom card, designed & built by my dad, for Tally Corp, formerly of Seattle, WA. I think it was a printer I/O card for a line of high speed, wide format printers also designed & built by my dad.
The DEC PDP-11/23 has the following cards: DEC M8186, National Semiconductor Memory Systems 551103882-003 Rev C, DSD A2132-4, Sigma 400x00 (4th digit obscured by overprinting on the board), and an Emulex SU0210401 Rev G
The PDP-11/05 [SOLD] has: DEC M7280, M7281, M7847 and a small [double height?] card packed with a bunch of resistors and not much else (help here?).