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smiddy



Joined: 31 Oct 2004
Posts: 559
smiddy
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?
Post 31 Oct 2011, 11:20
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17664
Location: In your JS exploiting you and your system
revolution
Code:
dw ("Sm" + "id" + "dy") and 0xffff    
Post 31 Oct 2011, 11:26
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smiddy



Joined: 31 Oct 2004
Posts: 559
smiddy
Thanks!

EDIT: Dah! Smile It will come back to me, I hope. Very Happy
Post 31 Oct 2011, 12:08
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