Re: Driver for EMS boards.

Mike A. Harris (
Sat, 23 May 1998 05:27:44 -0400 (EDT)

On Wed, 20 May 1998, Anthony Barbachan wrote:

> >> possible. However if you have the original DOS drivers, you can get this
> >> information by disassembling the drivers and tracing down generalities of
> >> how they work.
> >
> >Yes, I have downloaded the driver for DOS from AST. It is
> >called: REMM.SYS. It is from the file REMM470.ZIP from their ftp
> >site. I used a DOS DEBUG script to disassemble the file, and
> CV.EXE on a running driver would work better.
> I think DEBUG.EXE also would also work on a running driver, but it will be
> alot more difficult to look around with debug.

Yeah, ok, sounds good. I'll use Turbo Debugger on it I guess.

> >Where DX is not easily determined because it is calculated from
> >some existing value via a prior INC or DEC instruction, or an OR
> >or AND instruction. ;o(
> >
> >Some of the hard coded addresses that I found are:
> >
> >0x43, 0xFB, 0xE8, 0xEA, 0xF9, 0xE072, 0xE872
> Any jumpers on the card? I think it may be unlikely that AST would have
> hard coded the address into their driver.

Yes, there are 5 jumpers on the card, labeled E1-E5.

E2 is currently turned ON, and a spare is turned OFF sitting on
E1. I suspect that the jumpers choose the page frame, and
something else... I don't know what though.

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