INT 2F - CS_TSR specification - TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. INSTALLATION CHECK
	AX = 8000h
	DS:SI -> 4-byte CS_TSR signature (11h 43h 53h 10h)
Return: AL = status
	    00h no CS_TSR-compliant TSRs installed
	    01h installed, but signature did not match
	    FFh installed, signature matches
		ES:DI -> resident process block (see #02928) of last installed
			  TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. (if DS:SI pointed at signature on entry)
Program: the CS_TSR specification is a standardized TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. interface by Compact
	  Soft group in Kiev, Ukraine
Desc:	determine whether any CS_TSR-compliant TSRs are installed on the
	  selected multiplex number
Range:	AH=80h to AH=FFh
SeeAlso: AX=8001h"CS_TSR",AX=8002h"CS_TSR",AX=8003h"CS_TSR"


Format of CS_TSR process block:
Offset	Size	Description	(Table 02928)
 00h  4 BYTEs	CS_TSR signature 11h 43h 53h 10h
 04h	BYTE	INT 2F multiplex number
 05h	WORD	virtual process handle (unique among loaded TSRs)
 07h  2 BYTEs	version (binary minor version, then major version)
 09h	WORD	PSPsee Program Segment Prefix segment of TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination.
 0Bh	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. program name
 0Fh  3 BYTEs	program creation date (day, month, year)
 12h  3 BYTEs	process start time (seconds, minutes, hours)
 15h  3 BYTEs	process start date (day, month, year)