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mauiaaron / apple2

Apple //e emulator
http://deadc0de.org/apple2ix
GNU General Public License v3.0
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Undocumented behavior with BCD arithmetic #5

Open mauiaaron opened 10 years ago

mauiaaron commented 10 years ago

http://www.6502.org/tutorials/decimal_mode.html

A good introduction to undoc behavior of BCD arithmetic. At a minimum we should have a debug breakpoint for this so we can investigate disk images that might depend on it...

mauiaaron commented 10 years ago

Currently there is a c_debug_illegal_bcd() function that will segfault if we ever his this. Recommend vigilance =)