Hardware Flow Control/19200 vs. 9600 baud connections

[Marc Weinstein]

>From article <1991Apr21.160738.29629 at blilly.UUCP>, by bruce at balilly (Bruce Lilly):
> [ Followup set to comp.sys.3b1, since the other groups no longer exist... ]
> 
> In article <1991Apr21.020111.28633 at fithp> mhw at fithp (Marc Weinstein) writes:
>>[ ... ]
>>So, we then changed our PC-to-modem connection to 9600 baud, and everything
>>is working fine - no problems.  Our guess is that the port, and HFC, works
>>reliably at 9600 baud.
>> ...
> 
> Some questions:
> 1)	were you using the built-in RS-232-C port (/dev/tty000), or an EIA or
> 	combo card?

Originally, we were using the Combo card ports, and we wondered whether
that could have anything to do with it.  So, we switched to tty000, and
saw the same problems.  We're still loading 3.51m on the remote system,
so we're not sure where the problems are coming from.

> 2)	what loadable drivers are loaded, and in what order (run
> 	"/etc/lddrv/lddrv -s")?

/etc/lddrv/lddrv -s:

 DEVNAME  ID  BLK CHAR  LINE   SIZE    ADDR     FLAGS
    wind   0   -1    7   -1  0x9000   0x54000 ALLOC BOUND 
    lipc   1   -1   -1   -1  0x7000  0x360000 ALLOC BOUND 
     kbd   2   -1    9   -1  0x1000   0x5d000 ALLOC BOUND 
     cmb   3   -1   -1   -1  0x3000  0x367000 ALLOC BOUND 
     ate   4   -1   -1   -1  0x1000   0x5e000 ALLOC BOUND 

> 3)	have you tried transfers while other system activity was taking place,
> 	particularly while some large program was running (e.g. try switching
> 	windows a few times using shift-suspend or shift-resume)?

I had a lot of applications running at once.  Netnews software, mail tools,
changing windows, etc.  I exercised it pretty well.

-- 
Marc Weinstein
{simon,royko,tellab5}!linac!fithp!mhw		Elmhurst, IL
-or- {internet host}!linac.fnal.gov!fithp!mhw