INT 21 - Phar Lap 386/DOS-Extender - LOAD PROGRAM FOR DEBUGGING

	AX = 2512h
	DS:EDX -> pointer to ASCIZ program name
	ES:EBX -> pointer to parameter block (see #01363)
	ECX = size in bytes of LDT buffer
Return: CF clear if successful
	    EAX = number of segment descriptors in LDT
	CF set on error
	    EAX = error code (see #01362)
SeeAlso: AX=2517h