INT 2F - CS_TSR specification - GET PROCESS BLOCK BY PROCESS HANDLE             
	AX = 8002h
	BX = process handle for 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. (see AX=8001h"CS_TSR")
Return: ES:DI -> process block for specified 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. (see #02928)
		unchanged if no match for process handle
Note:	This function is used to allocate a process handle when the 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.
	  installs itself, by setting ES:DI to point at something other than
	  a CS_TSR process block's signature string and iterating through the
	  possible process handles (0001h to FFFFh) until ES:DI is returned
	  unchanged
SeeAlso: AX=8000h"CS_TSR",AX=8001h"CS_TSR",AX=8003h"CS_TSR"