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Groups > comp.sys.apple2 > #27398
| Newsgroups | comp.sys.apple2 |
|---|---|
| Date | 2016-04-12 09:45 -0700 |
| References | (13 earlier) <69ebcb70-27b6-4dd5-9084-c1b8030a4fbc@googlegroups.com> <f6f75c62-e05c-4659-ab0d-b82e04604948@googlegroups.com> <6ec76147-cbfd-4dfc-aee1-0184da015d5e@googlegroups.com> <a564fdbc-9dbe-41ef-abef-75a88bc17134@googlegroups.com> <nej6ds$c7b$1@dont-email.me> |
| Message-ID | <0fcde020-e797-4e28-b7b0-804965b846da@googlegroups.com> (permalink) |
| Subject | Re: new DOS ports |
| From | qkumba <peter.ferrie@gmail.com> |
> > Was it intended to run on a machine with less than 48KB of RAM installed? No, it's freely accessing regions above $8000. > MUCH more likely is that it was done that way in an effort to > hide/destroy code as part of preventing (or at least making it as > difficult as possible) copying and/or code analysis. Doing things like > that was VERY common back in the day - Stash a bit of crucial protection > code in the keyboard buffer, or the stack area, or on the text screen, > or any of a few other places that are, for whatever reason, "extra > volatile", so that if some "naughty" person manages to somehow bypass > whatever other protections are involved, they destroy that "magic" code > by trying to type a command or call a ROM routine, or do a register > dump, or... etc. That's a good theory. If you lose the input prompt code, you're stuck with no way to change the controls.
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new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-08-19 21:54 -0700
new DOS ports Jorma Honkanen <jormahonkanen@gmail.com> - 2015-08-20 04:07 -0700
Re: new DOS ports bpiltz@gmail.com - 2015-08-20 14:56 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-08-20 23:55 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-08-21 19:23 -0700
Re: new DOS ports Steve Nickolas <usotsuki@buric.co> - 2015-08-22 05:08 +0200
Re: new DOS ports Jorma Honkanen <jormahonkanen@gmail.com> - 2015-08-21 22:26 -0700
Re: new DOS ports Antoine Vignau <antoine.vignau@laposte.net> - 2015-08-21 23:51 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-08-29 21:19 -0700
Re: new DOS ports Jorma Honkanen <jormahonkanen@gmail.com> - 2015-08-30 00:22 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-08-30 06:41 -0700
Re: new DOS ports Jorma Honkanen <jormahonkanen@gmail.com> - 2015-08-30 09:31 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-08-31 14:58 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-02 13:11 -0800
Re: new DOS ports Steve Nickolas <usotsuki@buric.co> - 2015-11-02 23:01 +0100
Re: new DOS ports Steve Nickolas <usotsuki@buric.co> - 2015-11-03 10:03 +0100
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-03 16:20 -0800
Re: new DOS ports bpiltz@gmail.com - 2015-11-02 15:16 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-03 16:23 -0800
Re: new DOS ports John Brooks <jbrooks@blueshiftinc.com> - 2015-11-03 16:40 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-03 16:59 -0800
Re: new DOS ports John Brooks <jbrooks@blueshiftinc.com> - 2015-11-03 18:15 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-03 20:38 -0800
Re: new DOS ports John Brooks <jbrooks@blueshiftinc.com> - 2015-11-04 00:05 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-04 08:29 -0800
Re: new DOS ports sicklittlemonkey <nick.westgate@gmail.com> - 2015-11-04 13:31 -0800
Re: new DOS ports Steve Nickolas <usotsuki@buric.co> - 2015-11-05 03:14 +0100
Re: new DOS ports gids.rs@sasktel.net - 2015-11-05 16:55 -0800
Re: new DOS ports Steve Nickolas <usotsuki@buric.co> - 2015-11-06 02:00 +0100
Re: new DOS ports gids.rs@sasktel.net - 2015-11-06 14:34 -0800
Re: new DOS ports Steve Nickolas <usotsuki@buric.co> - 2015-11-07 02:19 +0100
Re: new DOS ports Jorma Honkanen <jormahonkanen@gmail.com> - 2015-11-10 21:24 -0800
Re: new DOS ports Jorma Honkanen <jormahonkanen@gmail.com> - 2015-11-18 01:34 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-18 08:22 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-18 10:08 -0800
Re: new DOS ports J. Random Hacker <jrh@fake.com> - 2015-11-18 12:34 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-18 22:49 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-11-19 09:45 -0800
Re: new DOS ports Jorma Honkanen <jormahonkanen@gmail.com> - 2015-11-20 02:12 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2015-12-13 07:57 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-01-01 08:49 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-01-05 20:29 -0800
Re: new DOS ports BLuRry <brendan.robert@gmail.com> - 2016-01-06 07:15 -0800
Re: new DOS ports "Michael 'AppleWin Debugger Dev'" <michael.pohoreski@gmail.com> - 2016-01-07 15:39 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-01-08 08:29 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-01-14 11:22 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-03-09 16:28 -0800
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-04-11 09:41 -0700
Re: new DOS ports Antoine Vignau <antoine.vignau@laposte.net> - 2016-04-11 15:17 -0700
Re: new DOS ports sicklittlemonkey <nick.westgate@gmail.com> - 2016-04-11 16:17 -0700
Re: new DOS ports fadden <thefadden@gmail.com> - 2016-04-11 16:52 -0700
Re: new DOS ports sicklittlemonkey <nick.westgate@gmail.com> - 2016-04-12 14:49 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-04-11 19:26 -0700
Re: new DOS ports fadden <thefadden@gmail.com> - 2016-04-12 08:46 -0700
Re: new DOS ports Don Bruder <dakidd@sonic.net> - 2016-04-12 09:09 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-04-12 09:45 -0700
Re: new DOS ports sicklittlemonkey <nick.westgate@gmail.com> - 2016-04-12 15:11 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-04-18 14:05 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-04-18 14:11 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-04-27 14:34 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-05-18 11:01 -0700
Re: new DOS ports qkumba <peter.ferrie@gmail.com> - 2016-06-06 11:21 -0700
Re: new DOS ports Antoine Vignau <antoine.vignau@laposte.net> - 2016-04-12 03:39 -0700
Re: new DOS ports bpiltz@gmail.com - 2015-11-03 18:04 -0800
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