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."