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- Path: sparky!uunet!cendata!mike
- From: mike@cendata.UUCP (Mike Heins)
- Newsgroups: comp.sys.sun.hardware
- Subject: Re: Do SPARCstations *really* support RTS/CTS flow control?
- Message-ID: <116@bif.UUCP>
- Date: 21 Jul 92 13:46:19 GMT
- References: <1992Jul20.192743.28639@tridom.com>
- Distribution: usa
- Organization: Central Data Corp., Champaign, IL
- Lines: 26
-
- >Actually, the 8530 doesn't support this mode of flow control. In fact I
- >don't know of ANY serializers that support this mode of flow control (in
- >hardware). RTS/CTS flow control is usually used in half-duplex, multidrop
- >or switched carrier systems in which RTS signals a request (by the DTE) to
- >transfer data and CTS aknowledges that request.
- >
- >The crossed RTS/CTS type of flow control that you're hinting at is actually
- >a standard "non-standard" that has evolved (I believe) out of the PC world.
- >
-
- In actual practice, since the RTS and CTS lines of most equipment are
- connected together, this type of flow control is eminently possible for
- any intelligent serial implementation and should be implemented. The
- newer modems require it to run fast without dropping characters,
- especially in heavily loaded systems that don't have the CPU power
- available to handle a full flow of incoming chars.
-
- Try our scsiTerminal Server. It has this capability, and works
- extremely well for connecting multiple modems to SPARCstations.
-
- Regards,
- Mike Heins
- ------------------------
- Central Data Corporation "Makers of the scsiTerminal Server"
- 1602 Newton Drive (800) 482-0315
- Champaign, IL 61821 mike@cd.com
-