Create Palette in macro?

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IdioticMoron

Joined: 17 Oct 2018
Posts: 4

IdioticMoron 17 Oct 2018, 01:47

In TASM, the below is a legal declaration in the data segment. Is there any equivalent structure in FASM?

Palette LABEL BYTE
i=0
REPT 32
db i/4,i,i/4
i=i+1
ENDM
...blah...

We can set the palette colors directly like below

mov dx,3c8h ; set color index port
xor ax,ax
out dx,al ; output color index 0
inc dx ; inc dx = 3C9h, color write port
...blah out this out that.....

but if I'm trying palette rotation, I don't know how to get the values back into a var so I can increase the color index and set the palette again.

Any help is appreciated!

_________________
gee that's a large beetle
i wonder if it's poisonous?

17 Oct 2018, 01:47

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19254
Location: In your JS exploiting you and your system

revolution 17 Oct 2018, 02:57

You can do this in fasm:

Code:

Palette:
repeat 32
 db (%-1)/4,%-1,(%-1)/4
end repeat

% is the repeat counter generated internally by fasm.

17 Oct 2018, 02:57

IdioticMoron

Joined: 17 Oct 2018
Posts: 4

IdioticMoron 17 Oct 2018, 03:51

Thanks, it works like a charm Cool

_________________
gee that's a large beetle
i wonder if it's poisonous?

17 Oct 2018, 03:51

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