[Solved] Value out of Range (weird)

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sid123

Joined: 30 Jul 2013
Posts: 339
Location: Asia, Singapore

sid123 09 Feb 2014, 12:01

I apologize for showing such ignorance but when I try this in FASM :

Quote:

mov bl, scan_code
;; Code
;; Code
;; And More Code
KERNEL_DATA:
scan_code db 0x00

FASM outputs a "Value out of range exception"
However,

Quote:

mov bx, scan_code
;; Same stuff
scan_code db 0

It works.

Can anyone explain me what does "Value out of range" mean?
And what should be done to put the value of scan_code into BL?

_________________
"Those who can make you believe in absurdities can make you commit atrocities" -- Voltaire https://github.com/Benderx2/R3X
XD

09 Feb 2014, 12:01

sid123

Joined: 30 Jul 2013
Posts: 339
Location: Asia, Singapore

sid123 09 Feb 2014, 12:04

I seriously need coffee.

Code:

;; Works.
mov bl, [scan_code]

Sorry for wasting people's time.
COFFFFFFFFEEEEEEEEEEEE!

09 Feb 2014, 12:04

HaHaAnonymous

Joined: 02 Dec 2012
Posts: 1178
Location: Unknown

HaHaAnonymous 09 Feb 2014, 16:34

[ Post removed by author. ]

Last edited by HaHaAnonymous on 28 Feb 2015, 18:17; edited 1 time in total

09 Feb 2014, 16:34

m3ntal

Joined: 08 Dec 2013
Posts: 296

m3ntal 09 Feb 2014, 22:12

You can't copy address (16BIT?) to 8BIT register, value exceeds size:

Code:

mov bl, scan_code

PS: Forgot []? Did you intend to read the 8BIT value at [scan_code]?

09 Feb 2014, 22:12

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