DTK BIOS Post Codes:

01	Testing the CPU
03	Initialize the 8259 interrupt controller
05	Initialize the video board - MCA & CGA
0D	Initialize the 8237 DMA controller
0E	Initialize the DMA 74612 page registers
12	Test the 8042 keyboard controller
16	Test the DMA 7237 controller and 8254 programmable interrupt timer
22	Testing DRAM refresh circuitry
25	Base 64KB memory test
30	Set up system stack
33	Read-system configuration through 8042 keyboard controller
37	Test keyboard clock and data line
40	Determine video type
44	Locate and test, if present, MDA and CGA video
48	Initialize video 80 x 25 mode
4D	Display DTK BIOS copyright message
4F	Check serial and parallel ports
50	Check floppy disk controller
55	Check shadow RAM
58	Display total memoryand switch to real mode
5A	Successful switch back to real mode
60	Check hard disk drive controller
62	Initialize floppy drive
65	Initialize hard drive
67	Initialize the floppy disk drive and the hard disk drive
6A	Disable gate A20 and test math coprocessor
70	Set system date and time RTC-146918
77	Call interrupt 19 boot loader