EA

For each opcode, determine read [0] and written [1] masks.

Values

ValueMeaning
EA0x100000
R0x200000

register (reg of modregrm field)

N0x400000

other things modified, not swappable

B0x800000

it's a byte operation

C0x1000000

floating point flags

mMEM0x2000000

memory

S0x4000000

floating point stack

F0x8000000

flags

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