Apple-2-HW/unified_retro_keyboard
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192 Commits 9 Branches 8 Tags 62 MiB
1d2ccf8727
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8 Commits

Author SHA1 Message Date
Dave
1d2ccf8727 Update PCB to latest schematic 2020-05-21 13:51:19 -05:00
Dave
9482a3bf0e Adjustments for OSI RESET and shiftlock circuits 
- adjust RC constants to use simple, common values and reduce number of
different part values.

- Create add-on PCB to provide reset/shiftlock function for older 542 and SB2
keyboards.
 2020-05-21 13:48:38 -05:00
Dave
32e74986c5 More special keys and other circuit cleanup. 2020-04-27 17:16:08 -05:00
Dave
01f57f69e1 Circuit tweaks 
- Add power-on reset to reset circuit
- Modify Shiftlock circuit to require only one jumper
 2020-04-23 11:27:54 -05:00
Dave
0e70d49f44 Remove unused files 2020-04-21 14:37:25 -05:00
Dave
fe238606ff Delete unused filenames 2020-04-21 14:36:44 -05:00
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
Dave
784805adc7 first commit 2019-12-12 14:46:29 -06:00