I don't know the Model of computer (Other then it's an IBM with an Intel processor) but the Mobo model number is 81894EU and below I have attached a backed up copy of my BIOS (Phoenix FirstBIOS V2)
IBM-2AKT48AUS.rom (Size: 512 KB / Downloads: 5)
![.rom](https://www.bios-mods.com/forum/images/attachtypes/image.gif)
-DJ