Bit CLeaR

NAME
	BCLR -- Bit clear

SYNOPSIS
	BCLR	Dn,<ea>
	BCLR	#<data>,<ea>

	Size = (Byte, Long)

FUNCTION
	Tests a bit in the destination operand and sets the Z
	condition code appropriately, then clears the bit in the destination.
	If the destination is a data register, any of the 32 bits can be
	specifice by the modulo 32 number. When the distination is a memory
	location, the operation must be a byte operation, and therefore the
	bit number is modulo 8. In all cases, bit zero is the least
	significant bit. The bit number for this operation may be specified
	in either of two ways:

	1. Immediate -- The bit number is specified as immediate data.
	2. Register  -- The specified data register contains the bit number.

FORMAT
	In the case of BCLR Dn,<ea>:
	~~~~~~~~~~~~~~~~~~~~~~~~~~~
	-----------------------------------------------------------------
	|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
	|---|---|---|---|-----------|---|---|---|-----------|-----------|
	| 0 | 0 | 0 | 0 |  REGISTER | 1 | 1 | 0 |    MODE   | REGISTER  |
	----------------------------------------=========================
	                                                  <ea>

	In the case of BCLR #<data,<ea>:
	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	                                                  <ea>
	----------------------------------------=========================
	|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
	|---|---|---|---|---|---|---|---|---|---|-----------|-----------|
	| 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 |    MODE   | REGISTER  |
	|---|---|---|---|---|---|---|---|-------------------------------|
	| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |       NUMBER OF THE BIT       |
	-----------------------------------------------------------------

REGISTER
	<ea> is always destination, addressing modes are the followings:
	--------------------------------- -------------------------------
	|Addressing Mode|Mode| Register | |Addressing Mode|Mode|Register|
	|-------------------------------| |-----------------------------|
	|      Dn *     |000 |N reg. Dn| |    Abs.W      |111 |  000   |
	|-------------------------------| |-----------------------------|
	|      An       | -  |     -    | |    Abs.L      |111 |  001   |
	|-------------------------------| |-----------------------------|
	|     (An)      |010 |N reg. An| |   (d16,PC)    | -  |   -    |
	|-------------------------------| |-----------------------------|
	|     (An)+     |011 |N reg. An| |   (d8,PC,Xi)  | -  |   -    |
	|-------------------------------| |-----------------------------|
	|    -(An)      |100 |N reg. An| |   (bd,PC,Xi)  | -  |   -    |
	|-------------------------------| |-----------------------------|
	|    (d16,An)   |101 |N reg. An| |([bd,PC,Xi],od)| -  |   -    | 
	|-------------------------------| |-----------------------------|
	|   (d8,An,Xi)  |110 |N reg. An| |([bd,PC],Xi,od)| -  |   -    |
	|-------------------------------| |-----------------------------|
	|   (bd,An,Xi)  |110 |N reg. An| |    #data      | -  |   -    |
	|-------------------------------| -------------------------------
	|([bd,An,Xi]od) |110 |N reg. An|
	|-------------------------------|
	|([bd,An],Xi,od)|110 |N reg. An|
	---------------------------------
	 * Long only; for others modes: Byte only.

RESULT
	X - not affected
	N - not affected
	Z - Set if the bit tested is zero. Cleared otherwise.
	V - not affected
	C - not affected

SEE ALSO
	BCHG  BSET  BTST 
	AND   BFCLR

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