In article <[EMAIL PROTECTED]> you write:
>As far as I understand a regular 25 pin serial port has 2 serial ports
>built-in on one chip. All serial lines which are needed for most
>communitcation devices (TxD RTS DTR RxD CTS DSR DCD RI) are doubled!
>The secondary ones are almost completely specified by the RS232
>(STxD SRTS SDTR SRxD SCTS SDCD) one would need to choose SDSR and SRI and
>I think that is possible with some pins left.
While the standard defines the secondary pins, most hardware doesn't
implement them. Some Sun workstations did. (Port was labled A/B.)
Many PCs use dual or quad serial chips, but they wire the ports to
different connectors (or leave them unwired).
--
Blars Blarson [EMAIL PROTECTED]
http://www.blars.org/blars.html
"Text is a way we cheat time." -- Patrick Nielsen Hayden
