CLeaR

NAME
	CLR -- Clear

SYNOPSIS
	CLR	<ea>

	Size = (Byte, Word, Long)

FUNCTION
	Clears the destination operand to zero.

	On an MC68000 and MC68HC000, a CLR instruction does both a
	read and a write to the destination. Because of this, this
	instruction should never be used on custom chip registers.

FORMAT
	-----------------------------------------------------------------
	|15 |14 |13 |12 |11 |10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
	|---|---|---|---|---|---|---|---|-------|-----------|-----------|
	| 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |  SIZE |    MODE   | REGISTER  |
	----------------------------------------=========================
	                                                  <ea>

REGISTER
	<ea> specifies destination operand, addressing modes allowed are:
	--------------------------------- -------------------------------
	|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|
	---------------------------------

SIZE
	00->one Byte operation
	01->one Word operation
	10->one Long operation

RESULT
	X - Not affected
	N - Always cleared
	Z - Always set
	V - Always cleared
	C - Always cleared

SEE ALSO
	MOVE  MOVEQ
	BCLR  BFCLR

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