RBIL61 - INT 2F - 4DOS v3.0+ - AWAITING USER INPUT {callout or callback}

INT 2F C - 4DOS v3.0+ - AWAITING USER INPUT                                     
	AX = D44Eh
---4DOS v3.01+---
	BX = condition
	    0000h 4DOS is ready to display prompt
	    0001h 4DOS has displayed the prompt, about to accept user input
Return: the handler must preserve SI, DI, BP, SP, DS, ES, and SS
Note:	v3.00 only makes the call corresponding to BX=0001h, does not set BX
SeeAlso: AX=D44Dh