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Type: Posts; User: dfnr2

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    About 6 years ago, I picked up a PDP-8/m and some...

    About 6 years ago, I picked up a PDP-8/m and some spare parts from a fellow who has been supplying and servicing DEC PDP-8 and PDP-11 controllers for boot and textile stitching machines since the...
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    Nicely done, and great write up! Dave

    Nicely done, and great write up!

    Dave
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    Cherry MX key preference

    I'm looking into the possibility of building up some ASCII keyboards for those who prefer not to build their own. The options for keys are Futaba MD-series keys and the various Cherry MX options.
    ...
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    Charles Mangin designed a 3D model for the power...

    Charles Mangin designed a 3D model for the power cap, and made it available on Thingiverse. You can order one for USD$18 each from shapeways, plus USD$12 shipping. Or USD$1.80/each from Jawstec or...
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    The keyboards can use Cherry MX or Futaba...

    The keyboards can use Cherry MX or Futaba MD-series switches. The 0.157" is the spec for the hole diameter, and that's what I originally used. The genuine Cherry MX Red keys, and Cherry Clone Brown...
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    Mainly because I just don't have the time. ...

    Mainly because I just don't have the time. However, I am happy to answer questions or otherwise digitally help out anyone out who is interested in building up a keyboard. Perhaps there might be...
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    With a volume discount, the keycap set set me...

    With a volume discount, the keycap set set me back about $65/set, including shipping and tax, and I'm making them available for $65/set if anyone wants one. The set includes more keys than needed...
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    Yes, this is a drop-in replacement. I had the...

    Yes, this is a drop-in replacement. I had the keycaps custom made. It would be great if these fit the original keys, but unfortunately they don't. Also, this keycap set uses a regular keycap for...
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    New Apple 2 keyboard replacement

    My recent project may be of interest to Apple II owners, and I'd like to share it. I've been working on an ASCII keyboard that can be used in general for the Apple II, as well as other...
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    It is because of RMS and the GPL that Linux did...

    It is because of RMS and the GPL that Linux did not have the same legal issues. And when presented with a serious challenge from SCO, it survived, not in a small part because of Linux's GPL and the...
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    You can see the base keycap set on a "classic"...

    You can see the base keycap set on a "classic" asr-33/adm-3a style keyboard here
  12. I don't have hard data, but given that it might...

    I don't have hard data, but given that it might be hard to control behavior of user programs, it might be nice to free up the full stack size. Could this be configured at compile time (i.e., just...
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    New keycaps are in!

    I finally got the keycaps in. Here's a photo of the keys loaded onto a slightly older version of the PCB. The current version of the PCB has an extra key to the right of the arrow keys at the...
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    I haven't yet built one up, but the Sol keyboard...

    I haven't yet built one up, but the Sol keyboard should give you an idea of how it will look, since it is based on that keyset. The base keyset is all the same gray color. Once I have one built up,...
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    Last night I experimented with adding in a...

    Last night I experimented with adding in a wire-bender to the PCB, but I got the most consistent results using a pair of pliers and a couple of guide holes, so I added the guide holes to the Cherry...
  16. I'm curious about the rationale for putting the...

    I'm curious about the rationale for putting the line buffer at $0100. Is it that the system + user programs are just unlikely to get deeper than $0180? I honestly haven't ever looked that deeply...
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    I tried the following metal rods: ...

    I tried the following metal rods:

    McMaster-Carr: Tight-Tolerance Easy-to-Machine 303 Stainless Steel Rod
    Ebay: 1.5MM STAINLESS STEEL ROD BAR SHAFT 300MM MODEL MAKER 316 MARINE GRADE ROUND

    It...
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    For future reference, I have sorted out the...

    For future reference, I have sorted out the stabilizers.


    - For both Cherry MX and Futaba spacebars, use the screw-in PCB mounted stabilizers. The PCB is ready for these at the Spacebar and 2x...
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    Thanks! I contacted the manufacturer, and they...

    Thanks!

    I contacted the manufacturer, and they will remake the RETURN key in the dark gray (near black) color. While they are at it, I am also ordering the DEL key and the centered decimal (.)...
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    Here is the keyboard next to the original: ...

    Here is the keyboard next to the original:

    61345
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    I finally got the keycaps in! Bear in mind...

    I finally got the keycaps in!

    Bear in mind that the basic keycap set has to be a good fit for several different machines, and therefore won't be an exact match to the Sol. The Sol-specific add-on...
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    Unfortunately, no. I inquired, since many...

    Unfortunately, no. I inquired, since many keyboards at the time did have angled keycaps. The company I used (Signature Plastics) doesn't offer it.

    One option (used in the Apple II/II+) is to...
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    60936

    60936
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    The keyboard is working with my SOL-20. The...

    The keyboard is working with my SOL-20. The behavior is faithful, with the above exception of CTRL+REPEAT for reset, instead of ALL_CAPS+REPEAT. This keyboard is configured for autorepeat (in...
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    The keyboard is pretty much fully working now,...

    The keyboard is pretty much fully working now, except that I'm still waiting for keycaps.

    There's one functional deviation from the original. The Sol keyboard produces a reset when...
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