3 ms·
The 6502 and variants (65c02, 65816, emulators, etc) have slightly different algorithms for BCD math. Adding illegal BCD numbers and checking the result is one
by ksherlock 12y ago
The 6502 and variants (65c02, 65816, emulators, etc) have slightly different algorithms for BCD math. Adding illegal BCD numbers and checking the result is one way to identify the processor.