ASCII interface update

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- Fix wrong direction DIP switch diodes
- Add buffers to permit ISP lines to also be used as output and LED drivers
- Allow 3 keyboard LEDs and 3 host outputs (RESET, CLEAR, BREAK, LOCAL, etc.).
- Outputs 1 and 3 are general purpose (can be open drain or driven).  Output 2
  is open collector (with optional on-board pullup).

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This commit is contained in:

David Fenyes 2020-01-02 22:13:36 -06:00

parent 4621770c31

commit dff3830307

3 changed files with 1923 additions and 1402 deletions

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hardware/interface-ascii/images/PCB-assembly-rendering.jpg

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hardware/interface-ascii/interface-ascii.kicad_pcb

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hardware/interface-ascii/interface-ascii.sch

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