[stella] Undocumented opcodes

Subject: [stella] Undocumented opcodes
From: "C. Bond" <cbond@xxxxxxxxxxxxx>
Date: Fri, 17 Oct 2003 17:53:31 -0700
There are a few 6502 articles on the net which give the function and
timing of miscellaneous undocumented opcodes. Unfortunately, the timings
given for some opcodes, with indexing, do not seem to account for page
crossing. According to the CPU model in the hardware manual, an extra
cycle is almost certainly required in certain cases and some these do
not agree with the numbers in the articles. Has anyone verified the
cycle count for undocumented opcodes?


Democracy: The triumph of popularity over principle.

Archives (includes files) at http://www.biglist.com/lists/stella/archives/
Unsub & more at http://www.biglist.com/lists/stella/

Current Thread