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Serial port issues was SP2 tickcounts ...



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> 1.  I guess that's the same for both external modems and Satellite, we need
> a high Speed Port, am I right ?

Yes.

> 2. If it's true, where can I check the speed of my port ?

If you are lucky you received some manual for the motherboard if 
these ports are on the motherboard. Otherwise you have to look for 
the serial port card and see what kind of chips are on there.

In general manufacturers have used better serial ports over the last 
years. Make sure you have at least a 16550 UART !!!

Important: Make sure the port does not share an interrupt with 
another device.

Even more important: If you have NT and a 16550 UART  read the 
following:

                 Using the Registry Editor (/system32/REGEDT32.exe):  
                   Select the key:  
                           \HKEY_LOCAL_MACHINE\System\CurrentControlSe
                           t\Services\Serial      Make sure you
                 have the following:  
                 ForceFifoEnable  REG_DWORD  1  
                 LogFifo          REG_DWORD  1  
                 PermitShare      REG_DWORD  0  
                 RxFIFO            REG_DWORD  8      or C  for a fast
                 machine TxFIFO            
REG_DWORD  10    - for
                 maximum write throughput  If not, change and/or add
                 values.  Exit the registry and reboot the system. 
                 The system event log should now have:  a. User
                 configuration data overriding firmware.  b. While
                 validating that COM1 was really a serial port,  
                   a FIFO was detected. The FIFO will be used.  


Make sure that no other setting in serial\parameters\serial0 etc. 
override these above settings. Basically the rxfifo and txfifo 
settings should match your hardware.  But txfifo can be higher to 
release resources to rxfifo.

Gerrit Jacobsen


> 
> ----- Original Message -----
> From: Gerrit Jacobsen <jrt@xxxxxxxxxx>
> To: Jim Johnson <jejohn@xxxxxxxxx>; <omega-list@xxxxxxxxxx>
> Sent: Saturday, May 22, 1999 6:56 PM
> Subject: Re: PS2k SP2 Update, Tick Counts and Rant
> 
> 
> > Jim,
> >
> > > 1. Will cable modems represent an improvement and elimate the need for
> > > me to get a high speed port?
> >
> > Depends, if this an external modem it will make your need for
> > high speed port even more urgent since the data has to get somehow
> > into your computer. If it is an internal modem you don't need any
> > port at all.
> >
> > > 2. What does a high speed port offer beyond my USR 56K VoiceWin modem?
> >
> > That you don't lose your data. The basic issue is that your
> > operating system cannot poll the data as fast as necessary
> > from the port. This is why the port must be able to store as much
> > data as possible.
> >
> > Gerrit Jacobsen
> >
> 
> 
>