Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Discussion about old sound cards, MIDI devices and sound related accessories.

Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby matze79 » 2019-10-05 @ 11:18

HOTFIXES for Older Cards Only, also for Tandy Lo-Tech Audio Compatible Card!!! has same bugs!:
68nf on SN76489, 2k2 Resistor on SN76489.

fixes.jpg


If you don`t add 2k2 Resistor you will get problems running Card together with a Soundblaster or maybe some other Cards on AT.. also some bios software get stuck until mcu circuit unmutes sn76489 (AT only)

2k2 from VCC to READY on SN76489.
68pf from 7 to 9 on SN76489. -> Fixes some Noise
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby dreamblaster » 2019-10-05 @ 12:41

Thanks Matze79 for the beautiful card, it works perfectly !
Highly recommended.
Here's a demo of Zeliard with TNDY card : https://youtu.be/CMAuSe2x4pQ

DSCN4840.JPG
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby root42 » 2019-10-07 @ 12:20

Finally, my kit arrived as well. Will try to assemble it and put out a video over the next week. :)
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby matze79 » 2019-10-07 @ 14:10

Glad you got it :)

Sorry for the messy Papersheet.
I had no better Idea :D as i have all parts in tubes.
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby hasnopants » 2019-10-07 @ 19:52

Got my card tested and working as well! Thank you Matze!

I got a 2nd bracket not sure if that was on purpose, but I dont think I need two. So if someone needs a spare bracket PM me.
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby matze79 » 2019-10-08 @ 10:49

This is Hot Spare ;D
you may want to keep it, for future replacement.
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby root42 » 2019-10-09 @ 21:08

Is it possible to get Lemmings to use the Tandy sound? It has two sound drivers as far as I can see: ADLIB.DAT and TANDYSND.DAT. However I feat that only TGALEMMI.EXE will use the tandy sound. Is that right? Would love to try Lemmings on the TNDY card...
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby matze79 » 2019-10-10 @ 11:38

Did you try copying TANDYSND.DAT over ADLIB.DAT ?

i have no idea i never tested Lemmings.
Several Games will only work with Tandy Graphics.. maybe some day one creates a FPGA based TCGA Card ;I
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby root42 » 2019-10-10 @ 12:12

Good idea. I‘ll try that. Supposedly the DAT files are basically COM binaries with the music data attached. Offering an API at int 61h to play the music. See also here:

https://github.com/tomsoftware/lemmings_music_player
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby matze79 » 2019-10-10 @ 14:09

If it checks Machine Byte or some kind of detection it will also not work ;)


You can also play the Lemmings MIDIs on the Card:
viewtopic.php?f=24&t=37630
viewtopic.php?f=24&t=37630&hilit=tronix&start=40#p709648

And here are the MIDIs:
http://www.lemmingsuniverse.net/downloads.html

EDIT: Ohh the MIDIs are no longer on the Site..
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby matze79 » 2019-10-11 @ 12:26

Jan is now trying to add support for machinebyte / string to the driver..
so more games will be able to run.
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby matze79 » 2019-10-13 @ 16:36

ERRATA:

The printing on the Card is wrong for Jumper Settings.

Update:
1E0h: JP2 1-2,3-4 JP1 2-3
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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Postby root42 » 2019-10-13 @ 18:53

Good news: I assembled my TNDY board. Went relatively well. The card seems to work as well. Outputs sound, but the bad news: it induces graphical glitches and system instabilities. Did anyone else have such problems? I tried on port 0C0h, but also on 2C0h and other ports with the tndy.com port remapper.
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