konc wrote on 2020-11-14, 09:47:

1541 wrote on 2020-11-13, 20:56:

Sellets from CN offer them on amazon.
www.amazon.de/dp/B01F35XBS4
However this is not Mini USB but USB-A

Exactly, I couldn't find anything like in your picture

I found two sources in the U.S.:
Shipping may be cheaper within the U.S. here: https://www.performance-pcs.com/cables/usb-ca … m-minia-60.html
Free shipping world wide here: https://www.moddiy.com/products/4-Pin-Molex-t … Cable-40cm.html

1541 wrote on 2020-11-20, 10:24:

I found two sources in the U.S.:
Shipping may be cheaper within the U.S. here: https://www.performance-pcs.com/cables/usb-ca … m-minia-60.html
Free shipping world wide here: https://www.moddiy.com/products/4-Pin-Molex-t … Cable-40cm.html

Thanks a lot, yes the first one wants 20euros to ship a cable over to Greece. For the second with free shipping the total is about right.

In the original thread there was talk of using 9600 baud for the "high speed" mode and implementing the logitech command to change to said speed. The purpose was to allow high precision use with unmodified logitech drivers. Was there ever any progress on this?

Has the issue with no Windows 95/NT drivers been solved when using 19200 baud mode? If I recall, that was the main hurtle for my use of the product. And 19200 baud was required to eliminate pointer lag when behind several KVM types. I recall there had been attempts to hack some Logitech drivers to get around this, but I don't know what became of this.

EDIT: I had a setup which let me use my Arduino to blank out the MCU so I could reprogram the unit, but I have since disassembled that setup so I'm no longer available to test alternate firmwares. I may have one blank MCU that I can still program, but won't be able to erase it again easily.

feipoa wrote on 2020-11-21, 03:05:

Has the issue with no Windows 95/NT drivers been solved when using 19200 baud mode? If I recall, that was the main hurtle for my use of the product. And 19200 baud was required to eliminate pointer lag when behind several KVM types. I recall there had been attempts to hack some Logitech drivers to get around this, but I don't know what became of this.

EDIT: I had a setup which let me use my Arduino to blank out the MCU so I could reprogram the unit, but I have since disassembled that setup so I'm no longer available to test alternate firmwares. I may have one blank MCU that I can still program, but won't be able to erase it again easily.

What I was referring to in my previous post was the next step in trying to solve the 9x/NT problem. By using 9600 baud for the high speed mode, you can use unmodified logitech drivers.

You can use the 6 pin ISP header and erase/write the chips with a parallel port

I don't recall 9600 baud working with any generic or branded Logitech Win9x/NT driver when I did my tests. If there has been some positive progress in this regard, I'd be interested.

feipoa wrote on 2020-11-21, 05:57:

I don't recall 9600 baud working with any generic or branded Logitech Win9x/NT driver when I did my tests. If there has been some positive progress in this regard, I'd be interested.

Because it was never implemented properly in any version of the firmware. In order for a logitech mouse to work at 9600 baud it must first be initialized at 2400 baud and then the driver sends a command to change to the higher speed. The response to said command was never implemented properly

Looks like your memory is better than mine. Thanks for providing this clarity. I'd also like to know if there have been any progress on this front.

Translated PS2maset to english, hope its understandable now.

Drivers for 19200 Baud Mode:

Cutemouse 1.9 is recommended for MS-DOS.

19200 Baud mode reduces Lag, and enhances Tracking Speed.
Especially in SVGA Games for example.

Is it possible to power it on a system without USB?

it just uses USB Connector for Power only,
you can power it from any 5v source.

You can also use Molex to USB Cable and connect it inside the PC.

Saved the page. I probably can't afford them for a couple of months, but a couple will be useful at some point. Just bought two Molex to USB cables from China.

Also got an ISA PS/2 card to try out on systems with no onboard serial.

I really gotta stop buying everything in sight 😀

News ! Sebastian designed a 3d print enclosure for PS2TOSERIAL :
You can find the enclosure stl files here : https://www.langer-sebastian.de/gehaeuse-fuer … rial-converter/
Also his contact details in case you'd like him to print it for you.

I got my PS2TOSERIAL a few days ago and it works flawlessly! Thanks for releasing this and thanks to SerdaShop for carrying it.

Sebastian's case also works great. I didn't have the right size screws, so I just wrapped the whole thing in tape and cut a square in the tape on top for the vent holes.

I saw SmooBandit's idea (in this post) of using the PSU's own 5V supply to power the board and I wanted to see if it was possible to go the rest of the way and make it completely internal (with just a PS/2 port exposed through a plate on the back of the case). My 486 had an unused internal COM header, so it seemed like this should be possible. I still wanted the option of using it externally, so I ruled out any soldering (which would make the conversion mostly trivial). The final adapter chain looked something like this:

A: PS2TOSERIAL
B: PS/2 panel mount extension cable
C: Any short A-to-mini-B USB cable
D: CRJ 4-Pin Molex to 5V Female USB
E: DB9-Male to IDC 10-pin serial adapter (DTK or AT/Everex)

Just plug everything together and now your retro computer has a PS/2 mouse port on the back. 😁

For E, my 486 happened to need the DTK version of the 10-pin cable. To find out which pinout you need, just unscrew the two nuts and peek at your existing serial jack, comparing it to the pictures at the bottom of each of those PCCables pages.

It would be cool to see an internal PS2TOSERIAL variant in the future. I'd buy one of those, too! It would just take replacing the USB power with a 4-pin floppy power header (and rotating it 90 degrees) and changing the PS/2 part to one with mounting screws for a plate. It'd still probably be best to leave the serial port there internally. Then the user could provide whichever version (DTK or AT) serial header they needed.

Falonn wrote on 2021-07-02, 22:38:

I got my PS2TOSERIAL a few days ago and it works flawlessly!

I am guessing that you won't be using through a KVM?

I hadn't planned to use a KVM. My goal was to have it look from the outside like the machine had a native PS/2 port. That said, there shouldn't be anything in that adapter chain that would be incompatible with a KVM (besides maybe the overall PS/2 cord length getting a little long when combined with that extension cable). I saw a few mentions about possible delays when using PS2TOSERIAL with a KVM back on page 1, but are there other known issues?

I saw the mention of baud rates in your post above. My motherboard seems to run it all the way down at 1200 baud. While I wouldn't describe the pointer as extremely smooth, it's still about as usable as I remember from back in the day.

I use it with KVM and use 19200 baud patched intelli mouse driver for windows 3.x and dos.
It works Fine and I haven’t any lag at all.

But there is still no working Win95 driver for 19200 baud, correct?

Falonn wrote on 2021-07-02, 22:38:

I saw SmooBandit's idea (in this post) of using the PSU's own 5V supply to power the board and I wanted to see if it was possible to go the rest of the way and make it completely internal (with just a PS/2 port exposed through a plate on the back of the case).

Nicely done.

Have you mounted the PS2ToSerial inside the case somewhere, or is it just hanging around?

With the adapter in the 3D printed case, I was less worried about it shorting out on anything, so it's more or less just hanging around. One more benefit of using all of the extension cables is that there is a lot of slack. You can tuck the thing just about anywhere in the case without any trouble. I'm using a CF-to-IDE adapter for storage, so the HDD cage in my case was empty and offered a nice, safe, out-of-the-way place to just leave it sitting around.