Date   : Thu, 16 Oct 2008 11:34:27 +0100
From   : robert@... (Rob)
Subject: master keyboard

Sorry, no.

It's a matrix which is scanned by the system VIA and decoded by the
OS.  There is no decoding to ASCII or otherwise done on the board.
You might have trouble finding one that is, as such an arrangement
doesn't provide for any form of key status scanning (i.e. testing if a
key is held down..).

I used to have (might still have) an old viewdata terminal keyboard
that was RS232 ASCII based, but that's going back well over 20
years... Maplin used to do a keyboard kit that was ASCII, but again,
that was a long time ago!  PC keyboards now send seperate key-up and
key-down status codes, among other stuff.

Rob

2008/10/16 Alan <ap007h5122@...>:
> Hi  Can anyone here confirm that the BBC Master keyboard is an ASCII coded
> keyboard.
> i.e. If an unshifted 'a' is pressed would a binary pattern of  01100001
> appear on a rear edge connector. (or 1100001 if it is 7-bit ASCII ) - which
> is 61H, 97D
>
> I am asking because I would like to use it with a homebrew Z80 computer
> which requires an ASCII keyboard. The computer is an Interak which is
> working well with it's present keyboard but the Master one looks much
> better.
>
> I have already googled for this information with no success.
>
> Thanks, Alan
>
>
>
>
>
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