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How to get compatibility of Tandy 3 voice / Tandy sound on Tandy 2500 RSX

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First post, by ychh0

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It is known that later Tandy models including Tandy 1000 RSX, 2500 RSX and so on do not have compatibility with previous model in terms of Tandy 3 voice and Tandy sound.

But there are several comments that some game titles inherently support Tandy 3 voice or sound of later models and for some Sierra titles using proper specific driver will get 3 voice and sound.

Today I tried to find ways to get 3 voice and sound on Tandy 2500 RSX but in vain, couldn’t find titles and Sierra drivers.

Are there game list that support later Tandy models inherently?
And which Sierra driver should be used to get Tandy 3 voice and Sound?

Thanks.

Reply 1 of 3, by Deksor

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According to this video https://www.youtube.com/watch?v=N1uxI3rHeoo&t=89s, the reason is because many games "think" that tandy graphic mode equals tandy sound support and no tandy graphic mode equals no tandy sound . Since this have a VGA chip the detection fails and you have no sound.

You may be able to find patches for these games though.

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 2 of 3, by Cloudschatze

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  • AGI Titles - Patch the Sierra executable (requires decryption), replacing the "out, c0h" instructions with "int, c0h". Run the modified executable with the -e and -t command-line parameters, in conjunction with Scali's "SNDTSR" port-forwarding utility.
  • SCI0 Titles - Supported via NewRisingSun's modified TANDY.DRV driver (01/29/1990)
  • SCI0.1 Titles - Supported via Sierra's aftermarket TANDYXL.DRV driver (12/18/1990).
  • SCI1 Titles - Native support via the TANDY3VD.DRV driver
  • SCI1.1 Titles - Native support via the TANDY3V.DRV and AUDTANDY.DRV driver combination

Reply 3 of 3, by ychh0

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Cloudschatze wrote on 2021-01-28, 19:15:
[…]
Show full quote
  • AGI Titles - Patch the Sierra executable (requires decryption), replacing the "out, c0h" instructions with "int, c0h". Run the modified executable with the -e and -t command-line parameters, in conjunction with Scali's "SNDTSR" port-forwarding utility.
  • SCI0 Titles - Supported via NewRisingSun's modified TANDY.DRV driver (01/29/1990)
  • SCI0.1 Titles - Supported via Sierra's aftermarket TANDYXL.DRV driver (12/18/1990).
  • SCI1 Titles - Native support via the TANDY3VD.DRV driver
  • SCI1.1 Titles - Native support via the TANDY3V.DRV and AUDTANDY.DRV driver combination

Thanks for detailed information.
Could you share or give information where the drivers could find?

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