Apple-2-HW/unified_retro_keyboard
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Project to provide keyboard replacements for various classic computers, as well as classic ASCII keyboard
135 Commits 12 Branches 8 Tags 62 MiB
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Ruby 7%
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Dave 5fa0f80b4e Add OSI interface schematic 
Provides a keyboard interface to interface with OSI computers.  Equivalent to an
OSI 542C.

- Includes sound circuits

- Includes RESET delay circuit

- SHIFT LOCK can be mechanical push-on/push-off or soft toggle, selectable by
jumper.

- Provide SHIFT LOCK LED output.
2020-04-21 14:30:59 -05:00
firmware/asdf Updated README to reflect progress 2020-04-15 15:23:42 -05:00
hardware Add OSI interface schematic 2020-04-21 14:30:59 -05:00
README.md Update README to include Sol keyboard 2020-04-16 13:53:17 -05:00

README.md

Unified ASCII Keyboard

This project aims to provide a (near) universal ASCII keyboard for vintage computers. Home computers of the 1970's typically either polled a switch matrix, or interfaced to a parallel ASCII keyboard via a parallel port.

The keyboard allows use of Cherry MX keys, or Futaba MD-4PCS (aka George Risk KBM-01-01) keys.

The keyboard is designed using KiCad in order to be the most useful for anybody wishing to modify the keyboard for more specific uses, or to add to the project.

This keyboard project so far consists of:

  • A classic retro-style ASCII keyboard, modeled after the ADM-3A keyboard, which can be also be populated to fit perfectly in an Apple II/II+ case (with corresponding Apple II keymaps), or an OSI case (with OSI adapter).
  • A Sol-20 compatible keyboard.
  • A keyscan/decoder interface module that can output parallel ASCII, and can be adapted for other protocols.
  • An OSI-compatible interface module.