| Title: | DECstation PC Conference |
| Notice: | register note 2, see notes 3 & 4 |
| Moderator: | TARKIN::LIN IND |
| Created: | Tue Jan 10 1989 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 7470 |
| Total number of notes: | 34994 |
Bill/Chet, Can either of you confirm whether the Venturis/Celebris FX 5xxx serial UARTs can transfer data at a 'sustained' rate of 115kbs using a null modem cable? I know the machines have "16550"s in them but the customer needs to know if the full speed can be acheived. If the UARTs can run long periods at this speed but cable type/length limitations are involved, please let me know what the rules are. Many thanx, Ron .
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 7358.1 | my opinion | TARKIN::LIN | Bill Lin | Thu Feb 20 1997 07:05 | 21 |
re: SNOFS1::16.153.96.192::powellronald
Ron,
Under the right conditions, even ancient 8088 processors can drive a
UART at 115kbps. But there's no way anyone can guarantee those speeds
without first characterizing the environment. It would be easiest
under a single-tasking environment such as MS-DOS. Win3.1/Wfwg/Win95,
don't even hint that it can be done. It would be easy to mess up, and
we'd get sued. WinNT, maybe. Again, it would be possible to mess up,
and again, we'd get sued.
Don't make any claims unless you're ready to first test/qualify it, and
then only use a real-time operating system. I don't consider any of
the above mentioned ones real-time OSes.
Maybe I've overreacted. I prefer to err on the side of caution.
Regards,
/Bill
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| 7358.2 | FX and UART speed | PCBUOA::GKELLEY | Thu Feb 20 1997 12:13 | 10 | |
The Venturis/Celebris FX use the SIS 5513 for serial IO. The chip is
spec'd at 115kbs. Bill's point as to whether or not the OS can support
this speed is correct.
I would suggest that the customer run a test to see if the application
can run at this speed, the chip is capable of it.
regards,
glen kelley
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| 7358.3 | thanx | SNOFS1::16.153.96.192::powellronald | Australia! | Tue Feb 25 1997 01:25 | 2 |
Thank you, Ron. | |||||