Abacus DOS problem Lock Selector

[Bruce McGovern <brucemcgovern@earthlink.net>]

A lawyer in California is trying to change to linux. In CA, there are a
number of programs required by the courts, and so far none are ported to
linux at any price.  His reason for wishing to change has to do with
the fact that Microsoft now controls his access to his own files, and he
finds this unacceptable.

I tried one of his apps, an old DOS version of Abacus.  Using the
WINe with Redhat 7.3, I get an error:

Warning: unprotecting the first 64KB of
memory to allow real-mode calls.
         NULL pointer accesses
will no longer be caught.
fixme:int31:INT_Int31Handler lock selector not supported
err:int31:INT_Int31Handler int31: unknown/not implemented
parameters:
int31: AX 0a00, BX 0005, CX 0000, DX 0000, SI 2bb2, DI 2bb2, DS 0267, ES
0267
wine: Unhandled exception, starting debugger...
err:seh:EXC_DefaultHandling Unhandled exception code 80000102 flags 0
addr 0x43

After some Google research, I found DOS PROTECTED MODE INTERFACE
listing, which says:

DPMI 0.9 + Lock selector Int 31/AX=0004h.

I tried all the versions for wine with no different result.

I am betting it is also missing Unlock selector 0005h.

I downloaded all monthly summaries of this mail list from Feb. thru part
of August, and did word searches with Open Office. No luck.

I have looked at dosemu, but simply do not relate to what they are saying
about building a .dexe file, 
sigh.

Any ideas at all?

Bruce McGovern writing from Mexico City