🚀 go-pugleaf

In <1992Aug19.135810.156@indyvax.iupui.edu> imhw400@indyvax.iupui.edu writes:

>WARNING:  newbie-type question follows.  I've been writing mainframe assembly
>language for years, but this is my very first program for MSDOS or the 80x86.

>I'm writing a gadget that needs to create or update an environment variable. 
>I'm writing in Arrowsoft Assembler (the only real-address-mode translator I've
>found for free :-) and have no libraries, so I have to code this myself.  I can
>find the parent process' environment block with no problem, and (I think) I
>understand the format thereof except for one thing:  how do I know the size of
>the environment block that I've located, so I don't run off the end and damage
>other structures?

Not bad.  From Ralf Brown's interrupt list (under "2152: GET LIST OF
LISTS") on memory control blocks, the answer is: the number of paragraphs
in the enviroment is the word at (envseg-1):3; the environment is a memory
block.  (This may not be compatible with some UMB managers.)
--
Arthur L. Rubin: a_rubin@dsg4.dse.beckman.com (work) Beckman Instruments/Brea
216-5888@mcimail.com 70707.453@compuserve.com arthur@pnet01.cts.com (personal)
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