I have tested the gampadLPT on 4 portable computers.
Tecra 500CDT:
MS-DOS 6.22
Printerport set as SPP (SPP = bi directional)
Atari 2600 joystick works fine
Spinner does nok work
Genesis does not work
IBM Thinkpad E600
Windows 98 DOS (MSDOS 7.1)
Was not able to set printerport type in BIOS.
Nothing worked.
IBM Thinkpad 390
Windows 98 DOS (MSDOS 7.1)
Set the Printerport as Bi-Directional i BIOS
Atari 2600 works fine
Genesis3 works fine. I tried with an original Sega megadrive controller (3 button)
Genesis6 works fine. I used a copy-genesis controller called retro-bit. All buttons worked.
The Genesis controllers ONLY worked when Jumpers was set for Atari mode! No power was needed.
Atari spinner does not work
IBM Thinkpad I Series 2611
MS DOS 6.22
Nothing worked.
Tried to set the printerport as Standard, bi directional and ECP
They all run with emm386 /NOEMS.
I tried with and without +5V