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Re: Ultima I--space travel

Subject: Re: Ultima I--space travel
From: "Mark Percival" <percivm@gmail.com>
Date: 19 Feb 2007 04:57:48 -0800
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On Feb 19, 6:07 am, "William Garber" <willy4...@garberstreet.com>
wrote:

> Simply switching the machine type isn't enough.
> There is a II+ ROM that needs to be in place.
> Did you change to that ROM??

Actually the ROMs isn't the problem either.  The problem is that the
section of code in question uses an undocumented opcde.  The original
game works with a 6502 but the opcode was changed with the 65c02 and
thus the bug.  I posted the fix that Nick mentioned 10 years ago.
Wow....time goes fast!

-- Mark

Diskmaker 8
http://www.gamebits.net/mark/DM8/

Follow-Ups:
- Re: Ultima I--space travel
  - From: "sicklittlemonkey" <Nick.Westgate@gmail.com>

References:
- Ultima I--space travel
  - From: Ophidian <zacwbond@vt.edu>
- Re: Ultima I--space travel
  - From: "sicklittlemonkey" <Nick.Westgate@gmail.com>
- Re: Ultima I--space travel
  - From: Ophidian <zacwbond@vt.edu>
- Re: Ultima I--space travel
  - From: "William Garber" <willy46pa@garberstreet.com>

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