offseting

[Diroga]

what is offseting?

[relsoft]

Depends.

In Real Mode, (QB) memory is divided in 64 KB segments and each data or code in a segment can be accessed using and offset.

Ie. Address = Segment:offset

Like:

Def seg = &ha000 'VGA seg

c=Peek(320) 'c= color in first pixel of 2nd row

[TheBigBasicQ]

Nice explanation rel. But a more understandable one would be:
In order to address memory you need two parameters: 1 is the segment the other is the offset.

Segment can be thought of as an array and the offset would refer to a particular element in that array. For example 56404:3212 means the 3212th element in the 56404 segment. Its just a neat way of addressing memory =P.

[na_th_an]

In Real Mode, (QB) memory is divided in 64 KB segments and each data or code in a segment can be accessed using and offset.

Ssssshhh... Don't let Glenn read this or he will flame you to the biggest extents!

[TheBigBasicQ]

BTW what happened to him? The last time I saw him nosing around was on the qb45.com's board =P.

[Diroga]

so wiht offsetting you can get 16 bit color?

[relsoft]

Offseting also applies to Pmode. :*)

In Relamode:

Address = Seg:off

Pmode.

Just the offset up to 4gig.

16 bit colors work in both modes. ;*)

Ie. UGL or Flib . Both real mode but uses Vesa.


Nath. Shhh. Glenny boy is enjoying his extended vacation. :*)

[TheBigBasicQ]

so wiht offsetting you can get 16 bit color?

Ahem offsetting is a method of addressing memory. It has nothing to with getting 16bit colors =P.

[Oz]

You could use the offset to determine if ur using 16bit colour....
Find the screen memory and scan DOS colour mode (i have the code here sumplace.......i'll post it when i find it)

Oz~