Rafi keyboard from 1976

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stynx's picture
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Rafi keyboard from 1976
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Image icon Rafi keyboard 19761.63 MB
Image icon Rafi keyboard 1976 number1.39 MB

Hi,

 

I have a keyboard used in a german made accounting computer from 1976. The keyboard has possibly hall-effect sensors to recognize key presses. Im interested if anyone has seen a similar keyboard? Maybe it can be adapted to the Apple 1?

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From what I've read if it

From what I've read if it uses a strobed parallel ASCII output it can be made to work.  Made to work does not necessarily imply "plug right in".  Most likely some kind of adapter cable will need to be made at minimum, and it is possible that some additional logic like inverting signals, etc, may be required to make ti work.  If you've got any kind of specs on the output that will make it easier.  If not you'll need to figure out what the output is in order to figure out what is necessary to make it work on an Apple 1.

 

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softwarejanitor wrote:From

[quote=softwarejanitor]

From what I've read if it uses a strobed parallel ASCII output it can be made to work.  Made to work does not necessarily imply "plug right in".  Most likely some kind of adapter cable will need to be made at minimum, and it is possible that some additional logic like inverting signals, etc, may be required to make ti work.  If you've got any kind of specs on the output that will make it easier.  If not you'll need to figure out what the output is in order to figure out what is necessary to make it work on an Apple 1.

 

[/quote]

 

There is a 256x8 rom (1702 compatible) that may be used for keycode conversion.

 

-Jonas

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Something to stop this forum putting crap in this box

This keyboard is extremely rare. RAFI made at least two keyboard types like that (with the castellated alignment rails): the older unnamed series offered magnetoresistive and mechanical switches (patents filed in 1970), which was followed by Rafi-System 72, or RC 72 series, which was Hall effect and mechanical (introduced in 1973 it seems). I am not aware of anyone ever finding the older type, and I have only ever seen one example of RC 72, using newer switches with much smaller magnets than the design in the patent and the 1983 catalogue.

The pinout of the switches may help identify what’s what: I am guessing two terminals for mechanical, while magnetoresistive has three and Hall effect has four (for non-illuminated switches). The 5 code on the PCB is probably the PCB part; keyboards have 3 codes instead, and I don’t see such a code, as that code would also indicate the series.

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