INT 21 U - DR-DOS 5.0+ - SHARE/HILOAD CONTROL
AX = 4457h
DH = subfunction
00h enable/disable SHARE
DL = 00h disable
= 01h enable
else Return: AX = ???
01h get HILOAD status
Return: AX = status
0000h off
0001h on
02h set HILOAD status
DL = new state (00h off, 01h on)
Return: AX = ???
other
Return: AX = ???
Note:   This was seen called by COMMAND.COM of DR-DOS 6.0

See also: 214457

214457 - DR-DOS 5.0+ - SHARE/HILOAD CONTROL