func.asm

来自「raywill写的操作系统内核」· 汇编 代码 · 共 26 行

;INT 15h
;AX = E801h

;Return:
;  CF clear if successful
;  AX = extended memory between 1M and 16M, in K (max 3C00h = 15MB)
;  BX = extended memory above 16M, in 64K blocks
;  CX = configured memory 1M to 16M, in K
;  DX = configured memory above 16M, in 64K blocks CF set on error
;This function has been around since about 1994, so all systems from after then up to now should have this function.

;Note: For optimum compatibility with all systems you should use the functions in the order: E820h, E881h, E801h and resort to 88h/C7h if everything else fails.
global _setvect

_setvect:
	push ebp
		mov ebp,esp
		push esi
		push ebx
	
		pop ebx
		pop esi
	pop ebp
	ret