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Undocumented behavior with BCD arithmetic #5

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mauiaaron opened this issue Feb 21, 2014 · 1 comment
Open

Undocumented behavior with BCD arithmetic #5

mauiaaron opened this issue Feb 21, 2014 · 1 comment

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

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@mauiaaron