VOGONS


OPL3LPT : OPL3 FM Synthesis on parallel port

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Reply 200 of 212, by Jinxter

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dreamblaster wrote on 2020-03-08, 13:40:
Jinxter wrote on 2020-03-08, 12:07:

Suggestion.
Sometimes i need to go to the back of the PC and press reset. Instead i start the opl3test which resets the OPL3LPT.
What about a reset util, or a parameter to the opl2test that only resets?

good idea

Wow that was quick. You already updated github with an oplreset.exe. Thanks. I have entered the oplreset.exe in my autoexec.bat

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Reply 201 of 212, by Jinxter

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The readme file states that you have to use EMM386 version 4.46 or later. I Tried the adlipt driver on PC DOS 6.00. With version 4.45 of EMM386. That did not work.
So then i copied the emm386.exe from a MS-DOS 6.22. I was surprised to se that PC DOS 6.00 had no objection to that.
So if you have an older DOS version on your retro PC, you probably don't have to upgrade DOS to a newer version. It is enough with the emm386.exe.
For me, this is important because i am trying to keep my Retro computers true to the time periode they were used.

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Reply 202 of 212, by dreamblaster

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Here's a new demo of OPL3LPT, running on IBM PS/2 Model 55sx, on youtube channel Retro Erik : https://youtu.be/bQZSTH5bQVQ

Visit http://www.serdashop.com for retro sound cards, video converters, ...
OPL2LPT, OPL3LPT, X2, S2, S2P, MCE2VGA, ... many projects !
Special vogons LPT bundle : https://www.serdashop.com/Parallel-port-retro-sound-bundle
Thanks for your support !

Reply 204 of 212, by matze79

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Yeah opl2lpt rocks! Great Device!!!

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 205 of 212, by Jinxter

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matze79 wrote on 2020-04-11, 19:08:

Yeah opl2lpt rocks! Great Device!!!

It there any reason so choose the OPL2LPT over the OPL3LPT?

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Reply 206 of 212, by root42

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Jinxter wrote on 2020-04-11, 19:20:
matze79 wrote on 2020-04-11, 19:08:

Yeah opl2lpt rocks! Great Device!!!

It there any reason so choose the OPL2LPT over the OPL3LPT?

Beautiful through hole chip of course!

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Reply 207 of 212, by appiah4

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Jinxter wrote on 2020-04-11, 19:20:
matze79 wrote on 2020-04-11, 19:08:

Yeah opl2lpt rocks! Great Device!!!

It there any reason so choose the OPL2LPT over the OPL3LPT?

Price maybe, also authentic OPL2 if you want adlib sound.

Retronautics: A digital gallery of my retro computers, hardware and projects.

Reply 208 of 212, by Jinxter

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appiah4 wrote on 2020-04-12, 05:06:
Jinxter wrote on 2020-04-11, 19:20:

It there any reason so choose the OPL2LPT over the OPL3LPT?

Price maybe, also authentic OPL2 if you want adlib sound.

Do they not sound exactly the same. Is not the only difference that the OPL3 has stereo?, and when using OPL2 games, will not the sound be the same?

Last edited by Stiletto on 2020-04-13, 05:24. Edited 1 time in total.

Check out my YouTube channel: Retro Erik https://www.youtube.com/channel/UCSUf7nCpwTgFbjGmcTYGZEQ
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Reply 209 of 212, by matze79

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But it feels different!

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 210 of 212, by appiah4

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Jinxter wrote on 2020-04-12, 11:59:

Do they not sound exactly the same. Is not the only difference that the OPL3 has stereo?, and when using OPL2 games, will not the sound be the same?

OPL3 has more voices, but is 100% backwards compatible. However, with Adlib/OPL2 you actually can't have the same amount of polyphony as OPL3, so it sounds completely different when playing chiptune music etc. as it completely skips some sounds.

Also, most sound cards featuring OPL3 have some kind of filtering going on that makes the resulting sound slightly different from the way an Adlib card does.

Retronautics: A digital gallery of my retro computers, hardware and projects.

Reply 211 of 212, by cde

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I have received and assembled my OPL2LPT and it is working very well! Thanks dreamblaster for the detailed instructions 😀 Also I got a few questions:

- Sometimes when I cold-start the PC the OPL2LPT will emit a sound or series of sounds. This isn't a real problem since it happens rarely and I can reset the OPL2LPT from DOS, but is this behavior to be expected or did I miss something about the assembly? Or could this be caused by the motherboard's BIOS (Abit KT7A) sending stuff over the parallel port?
- I tried to patch Monkey Island 1, and although the patch seems to proceed successfully (two locations were patch), I get no sound. OTOH the ADLIPT program will produce sound when the non patched MONKEY.EXE is run. Any idea?
- Are there particular noteworthy DOS games that make use of the OPL3 more advanced capabilities?

Reply 212 of 212, by dreamblaster

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cde wrote on 2020-04-25, 18:59:

- Sometimes when I cold-start the PC the OPL2LPT will emit a sound or series of sounds. This isn't a real problem since it happens rarely and I can reset the OPL2LPT from DOS, but is this behavior to be expected or did I miss something about the assembly? Or could this be caused by the motherboard's BIOS (Abit KT7A) sending stuff over the parallel port?

Yes it could be due to parallel port behaviour at bootup. The reset button or driver initialisation will resolve it.

cde wrote on 2020-04-25, 18:59:

- I tried to patch Monkey Island 1, and although the patch seems to proceed successfully (two locations were patch), I get no sound. OTOH the ADLIPT program will produce sound when the non patched MONKEY.EXE is run. Any idea?

no idea

cde wrote on 2020-04-25, 18:59:

- Are there particular noteworthy DOS games that make use of the OPL3 more advanced capabilities?

Cybersphere has very nice OPL3 music

Visit http://www.serdashop.com for retro sound cards, video converters, ...
OPL2LPT, OPL3LPT, X2, S2, S2P, MCE2VGA, ... many projects !
Special vogons LPT bundle : https://www.serdashop.com/Parallel-port-retro-sound-bundle
Thanks for your support !