INT 15 - VMiX - "sys_spawn" - START A CHILD PROCESS JOB SHELL
	AH = 0Dh
	STACK:	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	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. string starting with requested I/O channel and
			followed by standard VMiX shell command string
Return: AX = process ID or error code "SYS_ERROR"
Note:	the maximum string length is 7Fh characters
SeeAlso: AH=0Eh"VMIX",AH=11h"VMiX",INT 21/AH=4Bh