Udo van den Heuvel wrote in a message to Gerard Gerritsen:

 GG> If you really want to do something with DMA, you'll have to start using
 GG> device drivers.

 UvdH> How do I write a small/simple one?
 UvdH> Does anyone have source?

You really need the OS/2 Device Driver Kit (DDK), which is available from
IBM as an add-on to a DevCon subscription.  Several informational files
exist:

DEMODD.ZIP     68K  4-11-93  OS/2 demo device driver programming examples and C
                             header files
GAMEPT.ZIP      8K  9-27-92  OS/2 Game Port driver with ASM source
OS2_DD.ZIP     17K 12-07-94  OS/2 Device Driver Kit: Another approach to
                             building OS/2 PDDs with Watcom C, based on
                             Mastrianni's "Writing OS/2 2.1 Device Drivers in
                             C"
SCSIPG.ZIP    313K  3-26-93  OS/2 SCSI Device Driver Programming Kit
SEAGPWR0.ZIP    6K  5-17-95  Example with source code of OS/2 base device
                             driver (BASEDEV) that supposedly disables power
                             saving mode on Seagate hard drives; for Clive
                             Goldman
WATCOM.TXT      4K 11-21-94  OS/2 Device Driver Kit: Information about Watcom C
                             being used in place of Microsoft C 6.0
WATDD01.ZIP    39K 10-09-94  OS/2 Device Driver Kit: Set of libraries for
                             developing PDD's using Watcom C++ V10.  (Use -d
                             switch when UNZIPPING with DOS PKUNZIP.)

 UvdH> Can I do this with VP?

I assume you cannot.
 
-- Mike


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