Re: Mouse funny.
- From: Theo Markettos <theom+news@xxxxxxxxxxxxxxxxxxxxxx>
- Date: 06 Nov 2008 15:06:34 +0000 (GMT)
Rob Kendrick <nntp@xxxxxxxx> wrote:
No - it converts the PS/2 protocol to Acorn's quadrature encoding for
the dedicated (and weird) mouse port.
Well it's not that weird. And it's not Acorn's quadrature encoding. It's
'bus mouse' format which was popular in the 80s:
http://en.wikipedia.org/wiki/Bus_mouse
For some reason Acorn carried this on. Bus mouse was a sensible format in
1987 (serial was always horrid, and the PS/2 wasn't released until the
Archimedes hardware was already complete) and perhaps they thought people
might want to transfer their old mice to their new RPC. That was a bad
decision. A better decision would have been to have two PS/2 ports on the
RPC in addition and drive them through the one connector (laptop PS/2
splitter style) - which would have required minimal extra silicon in IOMD.
Theo
.
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- Mouse funny.
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- Re: Mouse funny.
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- Re: Mouse funny.
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