I got to thinking about scoring routines, and am assuming that it is the
norm to use BCD (binary coded decimal) for this? If its not, I reckon it
should be. BCD makes decimal arithmetic a cinch. One undocumented opcode
that I heard about yonks ago, but can't find now, is one that exchanges the
high and low nibble in a word. This would be ideal for optimising a BCD
display routine. Anyone know it?
Those interested in (gasp) dabbling in undocumented instructions might be
interested in this site... http://wwwstud.ira.uka.de/~s_tomczy/opcodes.html
Looks like some interesting stuff there, mmmh?
Enjoy!
A
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