Prolific based USB->Serial 8192 baud support

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Prolific based USB->Serial 8192 baud support

Postby antus » Thu Jun 24, 2010 9:58 am

Here is a registry file that should enable 8192 baud on generic prolific chipset usb->serial adaptors. Import the key in to the registry and restart your pc for the driver to pick up the new rate. Thanks to Malser for reporting this was possible, and how.
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Prolific_8192.zip
Prolific 8192 baud registry entry
(350 Bytes) Downloaded 673 times
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: Prolific based USB->Serial 8192 baud support

Postby delcowizzid » Thu Jun 24, 2010 10:50 pm

oh so it does work i added the extras into my driver reg but never got round to testing it out
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Re: Prolific based USB->Serial 8192 baud support

Postby Holden202T » Thu Jul 01, 2010 8:41 pm

does this only work on specific ones or is it generic .... i have one installed and did the path and no joy ?!?!

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Re: Prolific based USB->Serial 8192 baud support

Postby malser » Fri Jul 02, 2010 4:11 am

These options universal. I worked in many programs on speed 8192, and also on speeds 10400, 10472 (viewtopic.php?f=3&t=30&start=90). I made tests on 5 chipset of PL 2303 (H, HX, X, HXD chip version) and only one did not begin to work. That which without letters after 2303

Learn sets the speed by using the monitoring program requests to COM-ports, for example «Free Serial Port Monitor» of company «HDD Software». To do this:
• before the opening of a diagnostic run-monitor mode of the monitor port and choose the COM-port, which is used diagnostic program;
• select the presentation, which shows all the requests and responses from the driver COM-port (for example, "Table");
• Open a diagnostic program and try to briefly connect;
• return to the monitor ports;
• found in the log exchange request «Set baud rate» and transfer data rate from the field "Data" from hexadecimal to decimal format. Note that the first is the low byte value of the velocity:
See picture
Data: 00 20 00 00.
The velocity in hexadecimal: 00 00 20 00.
In decimal representation - 8192.

http://www.serial-port-monitor.com/free ... loads.html
8192.JPG
8192.JPG (190.83 KiB) Viewed 7341 times

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Re: Prolific based USB->Serial 8192 baud support

Postby Holden202T » Fri Jul 02, 2010 1:15 pm

mine is a PL2303 but it shows up as "usb/serial USB-HID -> Com Device (com9)"

the drivers listed are windows\system32\drivers\hidusb.sys (and others in the same folder)

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Re: Prolific based USB->Serial 8192 baud support

Postby malser » Sat Jul 03, 2010 4:21 am

For me a device is determined so: Prolific USB-to-Serial Comm Port (COM1)
C:\WINDOWS\system32\drivers\ser2pl.sys
USB\VID_067B&PID_2303
http://www.prolific.com.tw/support/file ... _v1210.zip

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Re: Prolific based USB->Serial 8192 baud support

Postby Holden202T » Sat Jul 03, 2010 8:42 am

yeah i've already downloaded that driver install, it doesn't seem to make a difference :(

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Re: Prolific based USB->Serial 8192 baud support

Postby malser » Sun Jul 04, 2010 6:06 am

How to detect a device in a system with a new driver? Prolific USB-to-Serial Comm Port? How it works on standard rates?

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Re: Prolific based USB->Serial 8192 baud support

Postby Holden202T » Sun Jul 04, 2010 10:54 am

hid compliant device

even when i try to update the drivers to the pl2303 ones it just never wants to use them.

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Re: Prolific based USB->Serial 8192 baud support

Postby antus » Sun Jul 04, 2010 6:47 pm

ive seen bad generic non microsoft certified HID device drivers cause all kinds of pain before. The ones I had were taking over my usb mouse. This was a long time ago and I dont recall the details but I had to do some registry hacking and file deleting to make them go away. After that my mouse was fine again, without it my mouse would not use any other drivers. You might have picked up some similar drivers along the way. :thumbdown:
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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