access to BIOS of DECpc

Hi all, I have this DECpc 320P which has a 40 Mb hard disk in it. I installed a 420 Mb hard disk, but it keeps being recognized as 40 Mb. I can not find a way to get into the BIOS, and those old PC's normally had a "utility floppy" to get access to the BIOS ... fdisk says 40 Mb. I guess it is OT as it is a PCP11-CA notebook computer from DIGITAL with a 386 CPU and a sticker on it from DECcare (valid to Jun 1994), so it must be at least 10 years old :-) This beastie has a black&white screen (no colors), but the name is just perfect (PCP*11*) and I would like to run E11/SIMH on it, but 40 Mb is a little small and I have this 420 Mb disk ... Who can tell me how to get into the BIOS (assuming that I can from there change the hard disk drive parameters) ; a ZIP-file with the utility disk would also be very welcome! TIA, - Henk, PA8PDP.