8088 32bit sub

 BBS: Inland Empire Archive
Date: 03-21-93 (13:23)             Number: 124
From: MARTIN RICHEK                Refer#: NONE
  To: DAVE M. WALKER                Recvd: NO  
Subj: 8088 32bit sub                 Conf: (1) 80xxx

Hi, Dave.

Quoted from DAVE M. WALKER on 3/20/1993 at 3:38 pm to DAVID
KIRSCHBAUM:

DMW> Start:     mov     es,[002Ch]      ;Grab environ seg in PSP
DMW>            xor     di,di           ;Start at offset 0000h
DMW>
DMW> FindEnd:   inc     di              ;Environ ends with a
DMW>            cmp     [WORD es:di],0  ;  double NULL
DMW>            jne     FindEnd

Although it doesn't occur very often, an empty environment begins
with two nuls, which your test will miss.

Regards,
mr
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