Int 21 Fn 252A  P - Phar Lap 386/dos-extender Vmm - New Load Program For   [E]

   AX = 252Ah
   DS:EDX -> ASCIZ program name
   ES:EBX -> parameter block (see AX=2512h)
   ECX = size of LDT buffer in bytes
   ESI = bit flags
       bit 0: allow demand paging rather than loading entire program
       bit 1: demand page from swap file rather than from .EXP

Return: CF clear if successful
       EAX = VMM handle or FFFFFFFFh if none
       ECX = number of descriptors in LDT buffer
   CF set on error
       EAX = error code
       02h file error
           EBX = file error code (see below)
           ECX = DOS error code if EBX=1,2,3, or 8
       08h insufficient memory
           EBX = memory error code (see below)
       80h LDT buffer too small
       87h called twice without intervening call to AX=2531h

See Also: AX=2512h,AX=2517h,AX=2529h,AX=2531h

Values for file error code:
 01h   DOS open error
 02h   DOS seek error
 03h   DOS read error
 04h   not an .EXP or .REX file
 05h   invalid file format
 06h   -OFFSET is not a multiple of 64K
 07h   -NOPAGE incompatible with -REALBREAK/-OFFSET
 08h   DOS error loading .EXE file

Values for memory error code:
 01h   out of physical memory
 02h   out of swap space
 04h   unable to change extended memory allocation
 05h   -MAXPGMMEM exceeded
 06h   insufficient low memory to REALBREAK value
 07h   insufficient low memory for PSP and environment