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Necromancer's Dos Navigator (Announce)

posted by RayeR(R) Homepage, CZ, 28.09.2018, 21:34

> Also, the 64-bit version won't work with any of my DOS setups (I use JEMM
> on all of them) -- I get an error message: D3X: error 0xFB: V86 mode
> So, the 64-bit versions apparently won't work when a 32-bit EMM is already
> installed since they put the CPU into V86/protected mode.

Yes, I got the same. I tested WIN32, DOS32 and DOS64 version on Core i7-2600K and all are able to run. Except as you noticed the 64b version cannot run under V86 mode that is in my case a big disadvantage why not to use it. But it seems to not be a bug but a limitation of D3X extender. Any of other DOS64 programs don't run under V86 too but it runs under plain DOS or XMS+UMBPCI. As we know from 64-bit OSes it problematic/impossible a coexistence of V86 and 64-bit long mode. It may be possible to completly save a v86 state before switching to long mode and then restore it after switching back but there wouldn't be v86 functions while run in long mode...

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DOS gives me freedom to unlimited HW access.

 

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