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- From: mrapple@quack.sac.ca.us (Nick Sayer)
- Newsgroups: comp.sys.sun.hardware
- Subject: Re: Additional RS232 ports
- Message-ID: <fQ0kyzh@quack.sac.ca.us>
- Date: 12 Aug 92 14:43:46 GMT
- References: <1992Aug11.000955.7170@leland.Stanford.EDU>
- Organization: The Duck Pond public unix: +1 408 249 9630, log in as 'guest'.
- Lines: 34
-
- bumbles@leland.Stanford.EDU (Steven Alexander) writes:
-
- >We have a need for using 15-20 serial RS232 ports on our
- >Sun Sparcstation 1. It comes with 2 serial ports. What
- >are our options for the additional ports?
-
- I know of two I can recommend: one is an Sbus card made by a company
- called CO/Systems. They make a version with 8 serial and one parallel
- port per card, as well as other combinations. It uses an on-board
- controller to lower the interrupt rate and consequently the load on the
- host CPU. They also have VME 6U and 9U versions and support sun3
- architectures, last I checked.
-
- Another is Central Data's line of SCSI serial expansion devices.
- They hook into your SCSI chain(s) and look and feel just like the
- typical Sbus expanders. It's not quite as good a solution, since it is
- an independantly powered intelligent device, which makes it not quite as
- subservient as if it was plugged directly into the machine's innards,
- but I have gotten good service out of it. And, of course, it's really
- the only choice for people with [SE]LCs. They have versions with two
- serial one parallel, 8 serial one parallel and 16 serial, as well as
- other configurations.
-
- In have used both products extensively and they pass my requirements.
- In both cases, I discovered a bug but also in both cases it was fixed
- quickly and patches were free.
-
- Apart from the above I have no connections with either firm.
-
- --
- Nick Sayer <mrapple@quack.sac.ca.us> | "My friends used to say I was such a nerd
- N6QQQ @ N0ARY.#NOCAL.CA.USA.NA | But I refused to touch that strange bean curd!
- 37 19 49 N / 121 57 36 W | Ah ee oh! Killer tofu! ee-ah-ee!
- +1 408 249 9630, log in as 'guest' | Ah ee oh! Killer tofu!"
-