Result of !(NOT) on integer value stored in an integer?

[superfury]

Can I replace the following:

VGA->precalcs.characterwidth = VGA->registers->SequencerRegisters.REGISTERS.CLOCKINGMODEREGISTER.DotMode8?8:9;

With:

byte characterwidth;
characterwidth = VGA->registers->SequencerRegisters.REGISTERS.CLOCKINGMODEREGISTER.DotMode8;
characterwidth = !characterwidth; //0 or 1 to add!
characterwidth |= 8; //Base of 8 to get 8 or 9!
VGA->precalcs.characterwidth = characterwidth; //Store! 

So any non-0 value becomes 0 and 0 becomes 1? (Used in my VGA emulation)

[kbw]

No. You're assuming that VGA->registers->SequencerRegisters.REGISTERS.CLOCKINGMODEREGISTER.DotMode8 is either 1 or 0.

But the test is checking if it's 0 or 1-254.

[superfury]

VGA->registers->SequencerRegisters.REGISTERS.CLOCKINGMODEREGISTER.DotMode8 is a bitflag of 1 bit (

(...)
byte DotMode8 : 1;
(...)

)

BTW does it matter if it's 0 or 1-254 VS 0 or 1? The result will always be 0 or 1?

(!0)==1
(!(1-255))==0

[Duthomhas]

That's right. The ! operator is a logical operator, so its result will always be 0 or 1.