Groepaz wrote: >> Does anyone have a NES? Were undocumented opcodes used in any NES games? > iirc the flag is ignored... and there are illegal opcodes, but they dont > exactly match the known ones -> http://en.wikipedia.org/wiki/2A03 See also this page discussing the 6502 decimal mode, which mentions that the 2A03 handles setting and clearing the decimal flag, but doesn't implement the decimal mode. This is achieved by removing five transistors in the core. http://visual6502.org/wiki/index.php?title=6502DecimalMode Best regards Anders Carlsson Message was sent through the cbm-hackers mailing listReceived on 2014-11-27 10:00:44
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