Is Com port CPU dependant?

[tuando]

Hello,

I had a 3D input device (SPACEBALL SPACETEC) hooked up in one of the Com port on a DUAL PII 266, 128 MB SDRAM PC66, #9 REV. 3D 8MB video card. When I touch the ball the 3D object seem to move (the response time of pans, zooms and rotates) much slower than when it is connected to a PIII 500, 256MB SDRAM PC100, ATI RAGE PRO 8MB. I am wondering if the Com port speed is CPU dependant. The faster the CPU is the faster the Com port will be. Any explanation is greatly appreciated.

[stylin19]

is it possible the baud rate is different on each machine ?

control panel\system\device manager
click + on Ports
click the port in question
select port settings and check Bits per second.

I was able to overrride the 115200 limit, but i forget if i used a reg hack, or just reset the settings in win.ini.

the settings in win.ini under ports might be set different for each machine. i beleive Windows default is 9600.

check under:
[ports]
COM2:=

try an set it to:
COM2:=921600,n,8,1p

then go back into control panel and see if you can set Bits per second to 921600.

not much...good luck




[This message has been edited by stylin19 (edited 04-26-2000).]