INT E1 - MP/M-86, - ALTERNATE CP/M-86One of the three operating systems offered by IBMInternational Busiuness Machines for its original PCIBM PC (the other two were MSDOS and the UCSD p-System).  It has since evolved into DR-DOS version 6 and Novell DOS 7. FUNCTION CALLS
	CL = function number (see #04019,#04020)
	DS,DX = parameters
Return: as appropriate for function
	CX is often the error code (see #04021)
Desc:	used by some applications which alter CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs).  MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086. functions while running a
	  child program, to store the original INT E0 vector before
	  intercepting INT E0
Notes:	This is the debugger entry to the operating system.
	This function is also supported by IMS Multiuser DOS and IMS REAL/32.
SeeAlso: #04019 at INT E0"CP/M(Control Program for Microcomputers) An early operating system for micros based on the 8-bit Intel 8080 CPU (and later the compatible 8085 and Zilog Z80 CPUs).  MSDOS version 1.0 was essentially a clone of CP/M for the Intel 8086."