Alexiev
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Description
ASCII to PS/2 Keyboard Adapter suitable for Apple and Apple II computers
This board converts either a PS/2 keyboard input or RS232 input into a ASCII keyboard interface. It has been tested with the Apple 1 and Apple II models, but other vintage computers that take a parallel ASCII keyboard interface should work. Apple IIe and later Apple computers will not work with this interface.
Features:
- Use a regular PS/2 keyboard on Apple II or other vintage computer that accepts ASCII keyboard input
- Upper and lower case support
- Support PS/2 numeric keypad (numeric mode only - cursor controls will not work)
- Use PC terminal program (hyperterm) running on modern PC, for vintage computer input device
- Echos PS/2 keyboard input to RS232 TX for input logging purposes
- cntrl-R - cntrl-S - cntrl-T reset sequence pre-programmed
- You can use terminal programs on a PC to send scripts of commands to target computer keyboard input interface. This is an easy way to load programs into vintage computers that otherwise must rely upon unreliable media, such as a cassette interface.
- Can be adapted to other vintage micro-computers by rewiring connection to target PC
- Operates from +5 volt supply (amperage requirements to be determined shortly)
- RS232 runs at 9600 baud
- Shift lock support - sending commands to change the LED status on the keyboard is trickier than one might imagine, but I finally have it working
- Arrow mapping to Apple esc-char cursor movement (Apple II specific)
- Cntl-Alt-Del reset support
- Easily jumperable keyboard 16 pin socket pinout - will allow apple 1 and other vintage computers with DIP16 header connections to use straight through ribbon cable connection
- Clear screen strobe support using cntrl-C cntrl-L contrl-R sequence (intended for apple 1)
- Optional automatic reset and clear screen after power up (version 2.2 and forward)
- Support for stretching strobe and holding strobe until acknowlegement (version 3.0 and forward)
Project page: http://www.willegal.net/appleii/appleii-kb-int.htm
Aug 27,2019
3,705 views
ASCII to PS/2 Keyboard Adapter suitable for Apple and Apple II computers
2 Layers PCB 50.8 x 76.2 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen
This board converts either a PS/2 keyboard input or RS232 input into a ASCII keyboard interface. Tested with the Apple 1, Apple II and clone
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Published: Aug 27,2019
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