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SB Live DOS emulation - my fight with SERR# to NMI routing (Developers)

posted by Japheth Homepage, Germany (South), 20.05.2008, 09:44

> > Maybe DMACHK from UMBPCI package?
>
> Well, it may be good start point. I tried DMACHK with various memory
> managers and OSes DOS 6.22, 7.1. Results can be divided to 2 groups.
IMO DMACHK is useless for this issue. The problem that upper memory cannot be accessed by DMA on some MBs is pretty unrelated to the SB PCI DMA problem. At best this tool tries to do some memory-to-memory DMA transfers using the legacy DMA controller, which has no relevance for the PCI problem.

> Then I tried some DOS sound test programs but I didn't heard sfx in any
> case. Programs hanged or played nothing. I also tested dstest.exe which is
> a part of HXDOS tests. Result with /v /p options, terminated normally but
> no sound:
Ok, this proves that your DOS SB emulator software has a problem. But this was pretty obvious already. You still don't even know for sure whether it is a hardware or software problem.

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MS-DOS forever!

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