'DTK ROM UTILITIES 1.41.12 R1 09/13/90CALCULATOR'
"CALCULATOR V1.41"

'1. CALCULATOR STATUS : ['
'NOTE : THE UTILITIES IN ITEM ONE INCLUDE THE'
' CALCULATOR AND HARD DISK PARK PROGRAMS, WHICH'
' CAN BE INVOKED AFTER BOOTING DOS BY PRESSING'
' CTL-ALT-5 (ON THE KEYPAD).'

Calculator? and disk parking? Even has MFM formatter still build in like its 1985.

'PTM - U28 & PTM - U51 DATATECH ENTERPRISES CO., LTD. 386 LABEL BI'
'OS (C) COPYRIGHT 1988 ALL RIGHTS RESERVED.@'

or 1988

'WHEN YOU ENABLE ANY ONE OF THE UTILITIES, SOME TEST PROGRAMS, SUCH AS IBM DIAGNOSTIC, QAPLUS, ETC. WILL DETECT CMOS RAM OR BASE MEMORY ERRORS.
SUCH ERROR MESSAGES ARE INACCURATE;
YOUR PC WILL STILL FUNCTION NORMALLY.
PRESS ANY KEY TO CONTINUE !'

that sounds encouraging and totally not insane!

'1. PASSWORD FOR SETUP.'
'MAX 4 CHARACTERS('

'2. PASSWORD FOR BOOT.'
'MAX 5 CHARACTERS('

all very secure 😀

' ROM SETUP PROGRAM VERSION 3.0'
'(C) COPYRIGHT DATATECH ENTERPRISES CO., LTD 1990-1992.'
' ALL RIGHTS RESERVED.'
'12/10/92'

So a bespoke 1988 386 BIOS with roots deeper in XT era turned 1992 486 BIOS.

Im loving it, thank you! Adding it to my BIOS zoo. Will disassemble later 😀

ps: and theretroweb has it wrong https://theretroweb.com/motherboards/s/dtk-pem-0036y listing AMI as potential available bios. Looking at all other DTK boards they rolled this weird custom bios just for Symphony chipset boards, probably got it from Chipset vendor and didnt bother porting to Ami/Award.