INT 21 - LANtastic - GET LOGIN ENTRY
AX = 5F80h
BX = login entry index (0-based)
ES:DI -> 16-byte buffer for machine name
Return: CF clear if successful
buffer filled with machine name ("\\" prefix removed)
DL = adapter number (v3+)
CF set on error
AX = error code
Note:   the login entry index corresponds to the value BX used in AX=5F83h

See also: 215F83

215F80 - LANtastic - GET LOGIN ENTRY