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Posted: **Sat Dec 22, 2007 2:34 pm**

http://www.osdev.org/wiki/Printing_to_Screen
I read this page and for me

 *((int*)0xb8000)=0x07690748; works but

the ASM version

Code: Select all

mov [0xb8000], 0x07690748

doesn't work

-- i used NASM to compile
its says "error operand size not specified" --- any clue why ??

thx for future help

Posted: **Sat Dec 22, 2007 2:44 pm**

packet50071 wrote:http://www.osdev.org/wiki/Printing_to_Screen
I read this page and for me
Code: Select all
 *((int*)0xb8000)=0x07690748; works but 
the ASM version
Code: Select all
mov [0xb8000], 0x07690748 
doesn't work -- i used NASM to compile
its says "error operand size not specified" --- any clue why ??

thx for future help

As it says, you haven't told it what size the data you're putting into 0xb8000 is. Try this:

Code: Select all

mov [0xb8000], dword 0x07690748

Posted: **Sat Dec 22, 2007 4:07 pm**

true thx

Posted: **Sun Dec 23, 2007 12:19 pm**

Although I prefer this:

Code: Select all

mov dword [0xb8000], 0x07690748

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