NAME	SUB -- Subtract
SYNOPSIS	SUB <ea>,Dn SUB Dn,<ea> Size = (Byte, Word, Long)
FUNCTION	Subtracts source operand to destination operand. Result is stored to destination's place.
FORMAT	15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 0 0 1 REGISTER OP-MODE MODE REGISTER   <ea>
OP-MODE	Byte Word Long 000 001 010 (Dn) - (<ea>) -> Dn 100 101 110 (<ea>) - (Dn) -> <ea>
REGISTER	One of the 8 datas registers If <ea> is source, allowed addressing modes are: Addressing Mode Mode Register Dn 000 No reg. Dn An * 001 No reg. An (An) 010 No reg. An (An)+ 011 No reg. An -(An) 100 No reg. An (d16,An) 101 No reg. An (d8,An,Xi) 110 No reg. An (bd,An,Xi) 110 No reg. An ([bd,An,Xi]od) 110 No reg. An ([bd,An],Xi,od) 110 No reg. An Addressing Mode Mode Register Abs.W 111 000 Abs.L 111 001 (d16,PC) 111 010 (d8,PC,Xi) 111 011 (bd,PC,Xi) 111 011 ([bd,PC,Xi],od) 111 011 ([bd,PC],Xi,od) 111 011 #data 111 100 * Word or Long only If <ea> is destination, allowed addressing modes are: Addressing Mode Mode Register Dn - - An - - (An) 010 No reg. An (An)+ 011 No reg. An -(An) 100 No reg. An (d16,An) 101 No reg. An (d8,An,Xi) 110 No reg. An (bd,An,Xi) 110 No reg. An ([bd,An,Xi]od) 110 No reg. An ([bd,An],Xi,od) 110 No reg. An Addressing Mode Mode Register Abs.W 111 000 Abs.L 111 001 (d16,PC) - - (d8,PC,Xi) - - (bd,PC,Xi) - - ([bd,PC,Xi],od) - - ([bd,PC],Xi,od) - - #data - - When destination is an Address Register, SUBA instruction is used.
RESULT	X - Set the same as the carry bit. N - Set if the result is negative. Cleared otherwise. Z - Set if the result is zero. Cleared otherwise. V - Set if an overflow is generated. Cleared otherwise. C - Set if a carry is generated. Cleared otherwise.

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