News for hackers. Stuff that matters.

A comment on Why do PCs load their boot sector at 7C000h linear?. Parent comment

Re:Why do PCs load their boot sector at 7C000h linear? by wruza on Saturday September 26, 2015 @07:57AM (#10282843)
07C0:0, actually :)
[ Parent | on HN ]
Re:Why do PCs load their boot sector at 7C000h linear? by raverbashing on Saturday September 26, 2015 @08:04AM (#10282857)
True, too bad I can't fix in the original comment

"The 16-bit segment selector in the segment register is interpreted as the most significant 16 bits of a linear 20-bit address"

However, Wikipedia has a funny quote on that

"Once the BIOS has found a bootable device it loads the boot sector to linear address 7C00h (usually segment:offset 0000h:7C00h, but some BIOSes erroneously use 07C0h:0000h"

https://en.wikipedia.org/wiki/Booting#BOOT-LOADER

[ Parent | on HN ]