Any OSs compatible with the Tandy brand double-density board in the Model I?

[kengr]

I recently acquired a Tandy brand double-density board for the TRS-80 Model I Expansion Interface.

I later read that the Model I double-density floppy operating systems are compatible with the more common Percom double-density board, but are not compatible with the Tandy brand double-density board without significant patching.

I see a reference to "DDOS" in the Tandy double-density board service manual, but haven't seen references to DDOS elsewhere.

Are there floppy operating systems available that are fully compatible with the Tandy brand double-density board, either as is or patched to be compatible?

Thanks.

 

[RedskullDC]

Hi,

Are there floppy operating systems available that are fully compatible with the Tandy brand double-density board, either as is or patched to be compatible?
Thanks.

LDOS certainly works with the Tandy Doubler board.

It's a case of loading the appropriate driver : PDUBL for (P)ercom, or RDUBL for (R)adio Shack.

I would very surprised to find there wasn't something similar for NEWDOS/80 or DOSPLUS.

Cheers,
Red

 

[Trash-Eighty]

From the NEWDOS/80 2.0 Manual:

 

[Eudimorphodon]

This page has the "Zap" listed for patching NewDOS80 v.2 to work with the Radio Shack doubler board. It didn't include support for it out of the box.

I'm pretty sure DOSPLUS and MULTIDOS also have support for it, but I've never used either.