globalsat bu-353 usb gps using serial or ps2 port

Because I believe my P200 laptop can't handle the USB gps and playing
mp3s at the same time (without skips in mp3 playback), I tried hooking
up the BU-353 gps via the ps-2 port with one of those adapters you get
for the mouse. The gps gets power and is blinking, having locked it's
coordinate position (in my bedroom!). However, Deluo Routis 2004 does
not "auto detect" the gps, saying there is no gps hooked to the
computer. Is there any way to make this work?

If anyone has seen a USB -> Serial -> Serial Port adapter, I can try
that in addition to my current USB -> PS2 -> PS2 Port adapter I have
now.

TIA,

Spacey

[For-Soft]
Is USB support slow in windows 98?
USB mouse vs. PS2 or COM mouse. USB mouse does not work smoothly quite
often when CPU is heavily used. PS2 mouse simply works.
Reason?
PS2 port requires much less CPU time in order to be serviced by the OS.
Theory:
The USB bus is run by the controller software driver. Any trasmition
requires the driver to process it, because the USB bus is designed to
be shared by many different devices in the same time. So, it is
necesary to manage the USB bus with complicated and time consuming way.

PCMCIA is a very interesting system. The PCMCIA card after initiating
by the PCMCIA manager software behaves like a hardware component
connected directly to the motherboard bus (ISA or PCI depending on the
PCMCIA controller type). It is possible to access the PCMCIA card
registers using CPU IO ports without any additional PCMCIA drivers.
To put it simple PCMCIA driver is necesary only to configure the PCMCIA
device. After that, the device works with it's own driver and it is not
necesary to use PCMCIA controller software, any more.

The point:
The multi purpose of the USB bus is the cause of it's weakest point:
high CPU demand.

The USB is good for very fast computers. But, IO devices like LPT, COM
or PS2 are handled faster by the OS.
[/For-Soft]

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