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This HTML version of the file intel.doc from the
PC Game Programmer's guide was produced by Zack T Smith. Fancy HTML modifications are copyright ©
2005 by Zack T Smith, all rights reserved.
This information is provided in the hope that it will be useful,
but without any warranty. It is provided AS-IS,
without even the implied warranty of fitness for a particular purpose.
N Instructions
NEG - Two's Complement Negation
Usage: NEG dest
Modifies flags: AF CF OF PF SF ZF
Subtracts the destination from 0 and saves the 2s complement of
"dest" back into "dest".
Clocks Size
Operands 808x 286 386 486 Bytes
reg 3 2 2 1 2
mem 16+EA 7 6 3 2-4 (W88=24+EA)
NOP - No Operation (90h)
Usage: NOP
Modifies flags: None
This is a do nothing instruction. It results in occupation of both
space and time and is most useful for patching code segments.
(This is the original XCHG AL,AL instruction)
Clocks Size
Operands 808x 286 386 486 Bytes
none 3 3 3 1 1
NOT - One's Compliment Negation (Logical NOT)
Usage: NOT dest
Modifies flags: None
Inverts the bits of the "dest" operand forming the 1s complement.
Clocks Size
Operands 808x 286 386 486 Bytes
reg 3 2 2 1 2
mem 16+EA 7 6 3 2-4 (W88=24+EA)
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