Groups > comp.sys.apple2.programmer > #578

Re: Apple IIe ROM and Assembly

Newsgroups	comp.sys.apple2.programmer
Date	2012-12-29 11:25 -0800
References	<41000cfb-6d04-4120-88f9-ad1b2c7aa776@googlegroups.com> <d3f29279-706e-429a-bc16-4fd45c350262@googlegroups.com> <97fbb84b-db0b-4592-98f4-d239ebbd3fa4@googlegroups.com>
Message-ID	<c80b4c2f-0bad-4f7b-9326-290ce844b563@googlegroups.com> (permalink)
Subject	Re: Apple IIe ROM and Assembly
From	Antoine Vignau <antoine.vignau@laposte.net>

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Rob is right. The IIgs is the perfect machine to crack 8-bit software. But there are a couple of drawbacks:
- the opcodes of the 65C02 (in emulation mode) that are seen as valid opcodes on the IIgs but that were seen as no-op on the previouo model. They were used to let the cracker wander in the code (false opcodes, e.g. Lady Tut) but such games will not boot/work fine.
- on-disk protections do not all behave correctly on the IIgs. For instance, spiradisc protections do not boot on a IIgs with the smartport interface whereas they boot on the IIgs with a Disk II interface card.

Antoine

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Apple IIe ROM and Assembly Neo Winston <mariosergio7@gmail.com> - 2012-12-27 06:10 -0800
  Re: Apple IIe ROM and Assembly gids.rs@sasktel.net - 2012-12-27 08:54 -0800
    Re: Apple IIe ROM and Assembly msergio@bbnmedia.org - 2012-12-27 10:39 -0800
      Re: Apple IIe ROM and Assembly Antoine Vignau <antoine.vignau@laposte.net> - 2012-12-29 11:25 -0800
        Re: Apple IIe ROM and Assembly Neo Winston <mariosergio7@gmail.com> - 2013-01-03 11:16 -0800
          Re: Apple IIe ROM and Assembly Dagen Brock <DagenBrock@gmail.com> - 2013-01-03 14:56 -0800
            Re: Apple IIe ROM and Assembly Neo Winston <mariosergio7@gmail.com> - 2013-01-04 07:11 -0800
  Re: Apple IIe ROM and Assembly BLuRry <brendan.robert@gmail.com> - 2013-01-13 23:44 -0800

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