From Patrick:
> Hi, Yes thats pretty much what I guessed. The problem is howto get
> >4 Mbps out there on the bus ! A standard PC wont send RS232 in
> anything near that speed, right ? Even 1-2 Mbps would be nice.

Sorry I missed the point the first time. Yes, I see now. Have seen
some mention of fast RS495 cards for PC's before...wait a minute,
here's one... http://www.technman.com

They make a 690k baud RS485 card that interfaces to their
products, sure there are others around.

Making your own parallel/serial converter may be a good option.
Use EPP mode so the PC only has to do one instruction to read or
write 8 bits, standard mode means the PC has the significant
overhead of toggling the strobe line etc. From memory I think you
should be able to get about 1M byte/sec (8Mbps).

Brent Brown
Electronic Design Solutions
16 English Street
Hamilton, New Zealand
Ph/fax: +64 7 849 0069
Mobile/text: 025 334 069
eMail:  brent.brown@clear.net.nz

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