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From: tbrown@lehi3b15.csee.Lehigh.EDU (Thomas Brown [901015])
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: ZIP files over 640k
Summary: no problem
Message-ID: <1353@lehi3b15.csee.Lehigh.EDU>
Date: 22 Jan 91 03:51:24 GMT
References: <1991Jan2.182749.18111@eng.umd.edu> <B6iDV3w163w@cybrspc> <10799@darkstar.ucsc.edu>
Reply-To: tbrown@lehi3b15.csee.Lehigh.EDU (Thomas Brown [901015])
Organization: CSEE Dept. Lehigh University, Bethlehem, PA
Lines: 22

I have created ZIP files which are 4MB in size on a 640K system
with no trouble; PKZip does not hold the whole thing in memory.
PKZip needs a small amount of scratch work memory and enough
memory to load the program in DOS (or you will get the "Insufficient
memory to load program" message).  If you get that message before
the PKZip signon message, you probably have too many bulky TSRs
loaded which are eating up your conventional DOS memory.  If you
*do* get the signon message and then a memory error, then you have
just enough free conventional memory to run PKZip, but not enough
for the scratch area.  In either case, check your TSR usage.

BTW, I have worked with large ZIPs with PKZip v1.01 through 1.1 with
no difficulty.

-Tom
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