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About 1944GPW

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About 1944GPW
Location:
Brisbane, Australia

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318
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April 26th, 2011
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Recent Entries

IBM System/360 and System/370 console button replica inserts

by 1944GPW on December 9th, 2017 at 11:19 PM
In case you need some stopgap inserts in a /360 or /370 console, until you find the originals (which I have found is very difficult).
They pass the 'Six foot Rule' test ie. they look good from 6 feet away.



See https://www.thingiverse.com/thing:2703172
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PTAP2DXF - make paper tapes without a punch

by 1944GPW on December 1st, 2017 at 06:04 AM
If you have a paper tape reader and no punch, you can now make real working paper tapes using a normal home stencil-cutting machine.
I've written a small command line utility that can take a .PTAP (or any other binary or textfile) and generate output that these
machines will cut. that your reader will read.

It can easily make repair pieces for existing old broken tapes from any byte offset. In addition it can

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PDP-Lifter

by 1944GPW on October 6th, 2017 at 10:46 PM
Racking an old PDP-11 or its peripherals can take some care, owing to the weight and bulk. The task can be made easier with this simple equipment lifting cart you can build. You can quickly, easily and accurately rack, unrack and move heavy gear with confidence - and possibly save your back as well.




You'll find more information and complete construction

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DECals

by 1944GPW on September 29th, 2016 at 07:05 AM
A few months ago I experimented with some do-it-yourself decal material I'd bought at a scale model exhibition.
I'd bought two types of the special paper, one type was the traditional waterslide decal paper in which the image is printed normally as you would look at it, then cut out, dipped in tepid water for 30 seconds and carefully
slid off onto the receiving surface. This type is the same as you have in a model kit. The other type of decal paper is for printing a reverse image,

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IBM I/O Selectric terminal interface for a microcomputer, circa 1980

by 1944GPW on December 22nd, 2015 at 08:23 PM
Back in the late 70s early 80s Dad brought home an IBM I/O Selectric terminal - probably a 2741 or MT/ST I/O Writer, I don't recall - that we planned to use as the terminal for our Fairchild/Mostek F8 development kit board that Dad imported from the USA in 1978. A few of dad's IBM colleagues were also 'into' the F8 and, being the old-school engineers they were, came up with this circuit design.

Sadly we didn't build it, so I can't tell you if it works. At the time we kids were more

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