New boards

[kinmami]

Hello Yamada-san,

I have designed and shared a PCB for your project.
https://www.pcbway.com/project/shareproject/NEC_PC_98xx_serial_mouse_adapter_from_PS_2_Mini_DIN_6_USB_A_to_Mini_DIN_9_d6c5232a.html
I have added a double-footprint to accomodate an USB-A and Mini DIN 6 as well.
In addition removing the Arduino's LDO, D0 can easily connect the (power)LED.
All Arduino's solder jumpers must be OPEN.
Thanks for your fantastic contribution!

Cheers,
Edoardo from Tokyo

[tyama501]

@kinmami
Wow! Nice board!
Thank you for sharing!

[kinmami]

@tyama501 Yamada-san thanks very much
I have added the DE-9 (D-Sub) version.
Users with PC-98 could use it too.

I am open to any possible development (forking) if you are willing to update the code.
https://www.pcbway.com/project/shareproject/NEC_PC_98xx_serial_mouse_adapter_from_PS_2_Mini_DIN_6_USB_A_to_DE_9_6f63e564.html

[tyama501]

Thanks again!

Maybe I will order mini DIN9 type since I don't have the one for my PC-9801BX.

Please tell me if the code doesn't work for your system :)

[kinmami]

Hello 山田さん
PS/2 mice supported and successfully tested.
However USB mice that are supposed to be PS/2-compatible do not work.
Arduino's D0 remains high and do not detect the mouse.
Could you pls confirm USB D+ and D- connections to Arduino?
Thank you
Edoardo

[tyama501]

Hello @kinmami

Thank you for the reporting and great photos!

All of your USB PS/2 mouse didn't work?
Or did some of them work?

My BUFFALO USB mouse worked but th Dell one didn't. ( I don't know the Dell mouse supported PS/2 but...)

Maybe there are some differences for the USB type that I don't know.
I will see if I can find something.

Thank you.

[kinmami]

Hello 山田さん
All USB PS/2 mice do not work.

Tested:

• Logitech RX 250
• Microsoft Wheel Mouse Optical

Native PS/2 mice work.

Tested:

• IBM M-SBK IBM7 (manufactured by Logitech)
• NEC

Thank you
Edoardo

[kinmami]

Hi again
does those diagrams make sense for you?
Thanks

[tyama501]

Hello Edoardo,

I couldn't find the general document describing how the D-/D+ is assigned to PS/2 signals.
(Your diagram seems ok with D+ Pin3 is PS2 Pin5 CLK)

I used an attachment with the BUFFALO USB mouse and it worked, but I didn't actually check the connection.

I am assuming there are some differences for detecting and start PS/2 protocols instead of USB.

Thank you.

[kinmami]

OK. thanks for the confirmation. Schematic and layout are correct after all. Most probably it is due to the non-standard protocol that some USB mice implement.

[kinmami]

I have released the standard layout version for common Arduino Mini Pro at https://www.pcbway.com/project/shareproject/NEC_PC_98xx_serial_mouse_adapter_from_PS_2_Mini_DIN_6_USB_A_to_DE_9_Standard_32bc41de.html

[tyama501]

Great! That can be made outside Japan.

Thank you!

[kinmami]

thanks for your initial idea and effort into development