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Assembler

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NAME NEG -- Negate
SYNOPSIS
NEG<ea>
Size = (Byte, Word, Long)
FUNCTION The operand specified by <ea> is subtracted from zero. The result is stored in <ea>.
FORMAT
1514131211109876543210
01000100SIZEMODEREGISTER
 <ea>
SIZE
00->Byte.
01->Word.
10->Long.
REGISTER <ea> specifies destination operand, addressing modes allowed are:
Addressing ModeModeRegister
Dn000No reg. Dn
An--
(An)010No reg. An
(An)+011No reg. An
-(An)100No reg. An
(d16,An)101No reg. An
(d8,An,Xi)110No reg. An
(bd,An,Xi)110No reg. An
([bd,An,Xi]od)110No reg. An
([bd,An],Xi,od)110No reg. An
Addressing ModeModeRegister
Abs.W111000
Abs.L111001
(d16,PC)--
(d8,PC,Xi)--
(bd,PC,Xi)--
([bd,PC,Xi],od)--
([bd,PC],Xi,od)--
#data--
RESULT
X-Set the same as the carry bit.
N-Set if the result is negative, otherwise cleared.
Z-Set if the result is zero, otherwise cleared.
V-Set if overflow, otherwise cleared.
C-Cleared if the result is zero, otherwise set.


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Änderungen und Irrtümer vorbehalten. Letzte Änderung:
14 September 2001.
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