About far jumps

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pini

Joined: 04 Jul 2005
Posts: 14

pini 27 Nov 2005, 16:24

Hi,

I'm currently writing a small program (in facts, it's a bootloader) and I want to perform a far jump when in 16 bits mode, after having entered protected mode. The target of that jump is the absolute value 0x10:0x100000.

My problem is that I can't find a way to write the correct jmp instruction, either with jmp far or jmp dword. Currently, I'm using the following hack :

Code:

db      0x66,0xEA,0x00,0x00,0x10,0x00,0x10,0x00

and it works well, but I really would like to be able to write something like "jmp dword 0x10:0x100000" instead.

Thanks,

pini

27 Nov 2005, 16:24

pini

Joined: 04 Jul 2005
Posts: 14

pini 27 Nov 2005, 16:31

Auto-reply: it works with this "jmp pword 0x10:0x100000". It didn't know this size specifier existed. FASM is definitely my favorite assembler Smile

27 Nov 2005, 16:31

RedGhost

Joined: 18 May 2005
Posts: 443
Location: BC, Canada

RedGhost 28 Nov 2005, 04:51

pini wrote:

FASM is definitely my favorite assembler

i tend to agree Cool

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redghost.ca

28 Nov 2005, 04:51

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