BTW, I tried the cf9,
This bit differs chipset to chipset.
The port 92? or the 0xfe command?
Btw what about HMA? Maybe you can simply link the post code to HMA. And win 64kb. Bonus is that it is reachable from real mode.
Boot loaders and OSes assume they can use the memory immiediately above 1Meg - the BIOS isn't allowed to reserve it.
Yes but I thought we can use it for POST. So maybe reloc is not needed? In general case we can put the POST 32bit code right to 1MB...