(Re)Learning FASM and programming

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smiddy

Joined: 31 Oct 2004
Posts: 557

smiddy 31 Oct 2011, 11:20

Hi,

I've been away for a while and am now getting back into programming again. I've been putting together my OS again and was trying to make a boot loader for a CD-ROM and was working on the checksum word type. I get an error with this:

Code:

dw ("Sm" + "id" + "dy")

Error: value out of range.

However, not with this:

Code:

dw ("Sm" + "id")

I assume it is wrapping out of bounds. How can I add up a group of words on compile such that I only get the resultant word value?

31 Oct 2011, 11:20

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20537
Location: In your JS exploiting you and your system

revolution 31 Oct 2011, 11:26

Code:

dw ("Sm" + "id" + "dy") and 0xffff

31 Oct 2011, 11:26

smiddy

Joined: 31 Oct 2004
Posts: 557

smiddy 31 Oct 2011, 12:08

Thanks!

EDIT: Dah! Smile

It will come back to me, I hope. Very Happy

31 Oct 2011, 12:08

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