00	Kaltstart, Ausgabe des EDX Registers zu den I/O ports 85h, 86h, 8Dh, 8Eh für den späteren Gebrauch
01	Initialisierung und Anpassung des KBD Controllers, ausschalten des CPU Cache, Intitialisierung des Onboard I/O chipset, Größe und Test des RAM, Größe des Cache
02	Einschalten(Monitor, DMA, FDC, I/O Ports, Lautsprecher, NMI)
03	CMOS-Checksumme des BIOS ROM berechnet
04	Test  des Seitenregisters
05	Einschalten des A20 Gate, Ausgabe des 8042 Selbsttests
06	Initialisierung ISA I/O
07	Warmstart und Anpassung des KBD Controllers, Initialisierung des Onboard I/O Chipsets.
08	Refresh toggle test
09	Test des DMA Masterregisters, Test DMA Slaveregisters.
0A	Basisspeicher 64k wird initialisiert
0B	Test Master 8259 mask, test Slave 8259 mask
0C	Test 8259 Slave, test 8259 slave's interrupt range, initialize interrupt vectors 00 - 77h, init KBD buffer variables.
0D	Test des Timers 0, 8254 channel 0
0E	Test 8254 Ch2, Lautsprecherkanalspeaker channel
0F	Test RTC, CMOS RAM read/write test
10	Turn on Monitor, Show any possible error messages
11	Read and checksum the CMOS
12	Call Video ROM initialization routines, Show Display signon message, Show ESC Delay message
13	Set 8MHz AT-Bus
14	Size and test the base memory, Stuck NMI check
15	No KB and PowerOn: Retry KB init
16	Size and test CPU Cache
17	Test A20 OFF and ON states
18	Size and test External memory, Stuck NMI check
19	Size and test System memory, Stuck NMI check
1A	Test RTC Time
1B	Determine Serial Ports
1C	Determine Parallel Ports
1D	Initialize Numeric Coprocessor
1E	Determine Floppy Diskette Controllers
1F	Determine IDE Controllers
20	Display CMOS configuration changes
21	Clear screens
22	Set/reset Numlock LED, perform Security functions
23	Final determination of onboard Serial/Parallel ports
24	Set KB Typematic Rate
25	Initialize Floppy Controller
26	Initialize ATA discs
27	Set the video mode for primary adaptor
28	Cyrix WB-CPU support, Green PC: purge 8259 slave, relieve any trapped IRRs before enabling PwrMgmt, set 8042 pins, Ctrl-Alt-Del possible now, Enable CPU Features
29	Reset A20 to OFF, install Adapter ROMs
2A	Clear Primary Screen, Convert RTC to system ticks, Set final DOS timer variables
2B	Enable NMI and latch.
2C	Reserved
2D	Reserved
2E	Fast A20: Fix A20
2F	Purge 8259 slave; relieve any trapped IRRs before enabling Green-PC. Pass control to INT 19 boot
32	Test CPU Burst
33	Reserved
34	Determine 8042, Set 8042 Warm-Boot flag STS.2
35	Test HMA Wrap, Verify A20 enabled via F000:10 HMA
36	Reserved
37	Validate CPU: CPU Step NZ, CPUID Check. Disable CPU features
38	Set 8042 pins (Hi-Speed, Cache-off)
39	PCI Bus: Load PCI; Processor Vector init'd, BIOS Vector init'd, OEM Vector init'd
3A	Scan PCI Bus
3B	Initialize PCI Bus with intermediate defaults
3C	Initialize PCI OEM with intermediate defaults, OEM bridge
3D	PCI Bus or PLUGnPLAY: Initialize AT Slotmap from AT-Bus CDE usage
3E	Find phantom CDE ROM PCI-cards
3F	PCI Bus: final Fast-Back-to-Back state
40	OEM POST Initialization, Hook Audio
41	Allocate I/O on PCI-Bus, logs-in PCI-IDE
42	Hook PCI-ATA chips
43	Allocate IRQs on the PCI Bus
44	Allocate/enable PCI Memory/ROM space
45	Determine PS/2 Mouse
46	Map IRQs to PCI Bus per user cmos, Enable ATA IRQs.
47	PCI-ROM install, note user cmos
48	If Setup conditions: execute setup utility
49	Test F000 Shadow integrity, Transfer EPROM to Shadow-RAM
4A	Hook VL ATA Chip
4B	Identify and spin-up all drives
4C	Detect Secondary IRQ, if VL/AT-Bus IDE exists but its IRQ not known yet, then autodetect it
4D	Detect/log 32-bit I/O ATA devices
4E	Atapi drive M/S bitmap to Shadow-RAM, Set INT13 Vector
4F	Finalize Shadow-RAM variables
50	Chain INT 13
51	Load PnP, Processor Vector init'd, BIOS Vector init'd, OEM Vector init'd
52	Scan PLUGnPLAY, update PnP Device Count
53	Supplement IRQ usage -- AT IRQs
54	Conditionally assign everything PnP wants
58	Perform OEM Custom boot sequence just prior to INT 19 boot
59	Return from OEM custom boot sequence. Pass control to 1NT 19 boot
5A	Display MR BIOS logo
88	Dead motherboard and/or CPU and/or BIOS ROM.
FF	BIOS POST Finished.