Unreal Mode: Difference between revisions
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Therefore IP is unaffected by all this, and the code itself is still limited to 64KiB.
<
; Assembly example
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times 510-($-$$) db 0 ; fill sector w/ 0's
dw 0xAA55 ; Required by some BIOSes
</syntaxhighlight>
===Huge Unreal Mode===
Huge Unreal Mode enables code over 64KiB. However, it is more difficult to implement as real mode interrupts do not automatically save the high 16 bits of EIP. Initialization is simple though, you just load a code segment with a 4GiB limit:
<
; Assembly example
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times 510-($-$$) db 0 ; fill sector w/ 0's
dw 0xAA55 ; Required by some BIOSes
</syntaxhighlight>
WARNING: this may not work on some emulators or some hardware.
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