INT 2F - SRSoft MODAL PC v2+ - SET ALL COMMON VARIABLES AND SEMAPHORES

	AX = AB05h
	DS:DX -> buffer containing common data
Return: AX = 5253h ('SR' byte-swapped) if installed
	CF clear if successful
	CF set on error
SeeAlso: AX=AB00h"MODAL",AX=AB03h"MODAL",AX=AB04h"MODAL",AX=AB06h,AX=AB07h