Hi there! Sorry for bumping this thread. I was looking at buying one of these off serdashop but had a question:

Does this adapter do *anything* to up the polling rate of the mouse in DOS? I hate using serial mice, and how imprecise and jerky they feel from the low polling rate. In Windows you can use a program called PS2rate with any PS2 mouse to up the rate and it makes mouse movement feel much more smoother in game.

Is this possible at all in DOS? Does this adapter help with that? (Would anyone be interested in looking at drivers?). Its the one thing that drives me insane trying to play FPS games in DOS.

Thanks!

Yes, you can use 19200 Baud and get improved mouse movement on serial.

Do we need to set the COM1 baudrate as well? with:

MODE COM1:9600,N,8,1,P

But DOS only allows max 9600 right?
Does the PS2MASET.EXE handle this already?

I've recently purchased PS2TOSERIAL from Serdaco shop.
My setup: I'm using Logitech Unifying wireless receiver connected to Belkin F1DS104J SOHO KVM USB mouse port. This KVM translates USB mice (also wireless) into PS/2 signals. From here the last hop I had to make is use PS2TOSERIAL in My VLB 486 (now with SC-55) which at time of writing is the only KVM client with no PS/2. Mouse worked out of the box but there was a huge lag making it unusable, same in DOS.

3 things had to be done:

1. Increase baud rate of COM port to 19200 (Windows 95 device settings)
2. Increase PS2TOSERIAL baud rate to 19200 with PS2MASET.EXE (setting is stored in device memory and applied after power cycle)
3. Use mouse drivers patched for 19200 baud rate (for MS-DOS and for Windows 95)

I then did some testing in games, switching back and forth, rebooting to MS-DOS mode, all good.

Useful links:
matze79 package ver. 1.1 (PS2TOSERIAL firmware, PS2MASET utility, patched CuteMouse driver for 19200 baud)
matze79 GitHub
matze79 thread on dosreloaded (in German)
CalamityLime post, 19200 baud rate patched Windows 9x mouse drivers. I used the "Win95C" version in my Windows 95 OSR1 by copying file to c:\windows\system\vmm32 when in MS-DOS mode and after reboot it works fine.
Serdaco thread on Vogons

Attached is a combined package of all files needed.

Hello,

Just wondering if the firmware (which appears to be 4kb in the repo, but the parts list has attiny2313 which is 2kb) above is good for the drilled rev3 version listed here at the beginning of the topic? That is much easier to build at home, so that would be a big relief.

Thanks

The latest Firmware will work on earlier Adapters too.
There where just some experiments with firmware updates from dos using a bootloader, thats why the 4kb mcu was used in some test versions.
I can't see any 4kb firmware image.