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From:	Martin Str|mberg <ams AT speedy DOT ludd DOT luth DOT se>
Subject:	Re: OT: Legacy Sound Blaster Settings
Newsgroups:	comp.os.msdos.djgpp
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Date:	11 May 2002 13:15:25 GMT
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Sahab Yazdani <sahaby AT vif DOT com> wrote:
: I am wondering, what *common* settings can the original Sound Blaster 
: take.  for instance, how many possible DMA values are there?

: i know that IRQ can theoretically be any of the 16 on the computer, but 
: what about its BASE ADRESS, DMA, or HDMA (for SB16).

If we are that theoretical, BASE ADDRESS == IO port -> 2^16 different
ones. DMA -> 4. HDMA -> 4 (numbered from 4 to 7).

Less theoretically some IRQ is used by the floppy, keyboard, hardware
clock, etc.; IO ports are often used in ranges and a lot of them are
used by the system, like the floppy and keyboard. Likewise for the DMA
channels. E. g. one is used for cascading the HDMA ones, IIRC.

For your problem I suggest you get hold of some manuals for the SB. In
them they should discuss the various settings the SB is capable of,
which is a lot less than the theorectical values discussed above.


Right,

						MartinS

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