Unfortunatly I have neither the correct compiler installed nor the required DDK but it does seem to support LPT as you can specify to use LPT using the build:

1 NMAKE OPL_ON_LPT=YES

https://github.com/andreiw/adlib21/blob/master/MAKEFILE#L15

And to specify a different port:

1NMAKE DEF_PORT=0x3BC

https://github.com/andreiw/adlib21/blob/master/MAKEFILE#L19

Sorry to be totally useless... Hope someone can help you...

It would be a very useful improvement if the driver would be improved so that it would properly obtain the I/O base port address from the BIOS Data Area (BDA), instead of assuming a hard-coded address.

That's the "proper" way to write applications accessing the printer ports. LPT1, LPT2 and LPT3 can be looked up in the BDA, and this would then work even for most modern PCIe cards, provided that you load something like the PRTADD utility in your AUTOEXEC.BAT file, before starting Windows 3.x.

I'll create a GitHub issue for it.

Deleted

UPDATED Windows 3.1 Driver! Now doesn't depend on other 386 library.
Here we go. Patched, works!!!
https://github.com/andreiw/adlib21/tree/master/PUB
Can't wait to test over MIDI real-time playing!

Hey there! I am particulary interested in supporting the OPLxLPT devices in my OPL applications, as they seem to be a decent choice for laptops. Is there any possibility to detect in software if the OPLxLPT device is present on particular LPT port? For example, Stereo-on-1 devices (dual stereo Covox at single printer port) bridge pins 9 and 11 on the LPT connector together, so bit 7 of Data Register (base + 0) could be read as inverted bit 7 of Status Register (base + 1).

I'm still interested in one of these if you are going to do another run. Seems like you were working on one last year, but then there wasn't any announcement after that. Is it dead?

Thanks

The Serdashop mailing list message from April 2 stated that, yes indeed they are back in stock!

MadMac_5 wrote on 2024-04-10, 21:29:

The Serdashop mailing list message from April 2 stated that, yes indeed they are back in stock!

Aha. I wonder if this is only from Europe or if there is anyone in the US that is selling these