gene heskett wrote:
> Based on the estimate that at least 95% of these aftermarket cards are 
> based on this MosChip 9815, could an insmod-able kernel driver could be 
> written that would make it work?
>
>   
Since the PPMC driver, and probably Mesa's, etc. go direct to the port 
registers with
inb and outb instructions, I'm not sure a driver could be inserted 
between the existing
EMC2 drivers and the hardware.

I know that you can run my boards with a completely software-driven 
handshaking in the
PS/2 bidirectional mode, but there is quite a lot of CPU overhead.  With 
a PCI parallel port
board, you can pump in or out bytes in 600 ns or less.  With the 
software handshaking,
it is more like 2 us per byte, although that measurement is from old 
motherboards, so it might
go faster today.

Jon

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