Xref: utzoo comp.sys.mac.hypercard:2575 comp.sys.mac.programmer:9561
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ames!apple!dan
From: dan@Apple.COM (Dan Allen)
Newsgroups: comp.sys.mac.hypercard,comp.sys.mac.programmer
Subject: Re: Latest version (Re: Hypercard stack structure? Corrupted Stack.)
Message-ID: <35502@apple.Apple.COM>
Date: 9 Oct 89 19:39:38 GMT
References: <144cs-sunb@massey.ac.nz> <35236@apple.Apple.COM> <15945@dartvax.Dartmouth.EDU>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 18

In article <15945@dartvax.Dartmouth.EDU> mjm@dartmouth.edu (Michael McClennen) writes:
>- Does HyperCard 1.2.5 simply run large stacks more efficiently than 1.2.2, or
>  are there substantial changes in functionality?
>
>- Do the two versions use the same file format, so that we could develop using
>  1.2.5 and distribute for use with 1.2.2?

HC 1.2.2 verses HC 1.2.5: there are no substantial changes in
functionality, but there are two very small (but important) bug fixes
that cause large stacks to usually be corrupted.  One of the bugs would
corrupt a stack when it had more than 8000 cards, while the other one
allows stacks to grow to their theoretical maximum of 512 MB.

The file format of HC 1.2.2 and HC 1.2.5 is identical.

Dan Allen
HyperCard Team
Apple Computer