>>I recently aquired a couple of 8M SIMMs to increase my system's memory up
>>to 32M.  However, NetBSD 1.1B will not work now, and panics with a "ptdi:"
>>message right after "biomask, netmask, ttymask" when I boot with 32M
>>installed. 

>I wouldn't expect that exact result, but I believe there is a problem with
>your sound blaster.  The ISA bus only has 24 address lines (which allow for
>16 Mb of address space).  The Soundblaster uses DMA and is ISA, so any DMA
>request that happens to be above 16 Mb will cause a problem.  I believe
>NetBSD doesn't support bounce buffers, (like 95 and NT do I think).
>Normally you'll get a "DMA beyond end of ISA" message, but who knows...  It
>might be worth looking into.

Yes, but if I'm not mistaken, the SoundBlaster uses the motherboard
DMA controllers.  Those should work with >16MB because they're on the
"memory side" of the bus.

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  Michael L. VanLoon                                 michaelv@HeadCandy.com
        --<  Free your mind and your machine -- NetBSD free un*x  >--
    NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
        Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
    NetBSD ports in progress: PICA, others...

   Roll your own Internet access -- Seattle People's Internet cooperative.
                  If you're in the Seattle area, ask me how.
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