INT 21 - Phar Lap 386/DOS-Extender VMM - READ REGISTERS AFTER CTRL-C INT

	AX = 2528h
	DS:EBX -> buffer for registers (see #01368)
Return: CF clear if successful
	    DS:EBX buffer filled
	CF set on error
	    EAX = error code
		83h interrupt state save not enabled
		84h no active interrupt
SeeAlso: AX=2527h