ISO BIOS Update for NEC 4A3NT0X0.11

[kopfjaeger]

Greetings Tekkies,

Recently came into possession of an old NEC PC whose BIOS init string reads:

4A3NT0X0.11C.0004.P02.980109815
PHOENIX BIOS 4.0 Rel. 6.0
Intel 1996-1997

Currently packs an ancient Intel 233 MHz MMX CPU

My GOOGLE search of the root init string 4A3NT0X0.11 tells me that the MoBo is a NEC Direction SPT series machine, although Packard Bell seems to use a related board.

QUESTION:

What is the most up to date BIOS flash for this board?

Thanks in advance for your vastly useful and brilliant response(s).

Cheers,

KJ