RBIL61 - INT 21 - Phar Lap 386/DOS-Extender - SET REAL- & PROTECTED-MODE INT VECTORS {protected mode}

INT 21 P - Phar Lap 386/DOS-Extender - SET REAL- & PROTECTED-MODE INT VECTORS
	AX = 2507h
	CL = interrupt number
	DS:EDX = CS:EIP of protected-mode interrupt handler
	EBX = CS:IP(Internet Protocol) The lower level (transport layer) of the TCP/IP protocol suite.	See also TCP, TCP/IP. of real-mode interrupt handler
Return: CF clear
Notes:	interrupts are disabled until both vectors have been modified
	this function is also supported by FlashTek X-32VM
SeeAlso: AX=2504h,AX=2505h