SIEMENS NIXDORF Informationssysteme AG            Brgerm.-Ulrich-Str. 100
Abtl. Personal Computer                           Augsburg
                                                  GERMANY
http://www.scenic.de                              Tel:  0821-804-0


Scenic PC-BIOS (entspricht PHOENIX BIOS 4.0)


POSTcode     TEST-DESCRIPTION

  02         Verify Real Mode.

  04         Get CPU type.

  06         Initialize system hardware.

  08         Initialize chipset registers with initial POST values

  09         Set in POST flag.

  0A         Initialize CPU registers.

  0C         Initialize cache to initial POST values.

  0E         Initialize I/O.

  10         Initialize Power Management.

  11         Load alternate registers with initial POST values.

  12         Jump to "UserPatch0".

  14         Initialize keyboard controller.

  16         BIOS ROM checksum.

  18         8254 timer initializaton.

  1A         8237 DMA controller initialization.

  1C         Reset Programmable Interrupt controller.

  20         Test DRAM refresh.

  22         Test 8742 keyboard controller.

  24         Set ES segment register to 4 GB.

  28         Autosize DRAM.

  2A         Clear 512k base RAM.

  2C         Test 512k base address lines.

  2E         Test 512k base memory.

  32         Test CPU bus-clock frequency

  34         Test CMOS RAM.

  37         Reinitialize chipset.

  38         Shadow the system BIOS ROM.

  39         Reinitialize cache memory.

  3A         Autosize cache memory.

  3C         Configure advanced chipset registers.

  3D         Load alternate registers with CMOS values.

  40         Set initial CPU speed.

  42         Initialize interrupt vectors.

  44         Initialize BIOS interrupts.

  46         Check ROM copyright notice.

  47         Initialize manager for PCI Option ROMs.

  48         Check video configuration against CMOS.

  49         Initialize PCI bus and devices.

  4A         Initialize all video adapters in system.

  4C         Shadow the video BIOS ROM.

  4E         Display copyright notice.

  50         Display CPU type and speed.

  52         Test keyboard.

  54         Set key click if enabled.

  56         Enable keyboard.

  58         Test for unexpected interrupts.

  5A         Display "Press F2 to enter SETUP" message.

  5C         Test RAM between 512k - 640k.

  60         Test extended memory.

  62         Test extended memory address lines.

  64         Jump to "UserPatch1".

  66         Configure advanced cache registers.

  68         Enable external and CPU caches.

  6A         Display external cache size.

  6C         Display shadow message.

  6E         Display non-disposable segments.

  70         Display error messages.

  72         Check for configuration errors.

  74         Test Real-time clock.

  76         Check for keyboard errors.

  7C         Set up hardware interrupt vectors.

  7E         Test coprocessor if present.

  80         Disable onboard I/O ports.

  82         Detect and install external RS232 ports.

  84         Detect and install external parallel ports.

  86         Reinitialize onboard I/O ports.

  88         Initialize BIOS Data Area.

  8A         Initialize Extended BIOS Data Area.

  8C         Initialize floppy controller.

  90         Initialize hard-disk controller.

  91         Initialize local-bus hard-disk conroller.

  92         Jump to "UserPatch2".

  94         Disable A20 address line.

  96         Clear huge ES segment register.

  98         Search for option ROMs.

  9A         Shadow the option ROMs.

  9C         Set up Power Management.

  9E         Enable hardware interrupts.

  A0         Set time of day.

  A2         Check key lock.

  A4         Initialize keyboard typematic rate.

  A8         Erase "Press F2..." message.

  AA         Scan for F2 key stroke.

  AC         Enter SETUP.

  AE         Clear in POST flag.

  B0         Check for errors.

  B2         POST done - prepare to boot operating system.

  B4         One beep.

  B6         Check password (optional).

  B8         Clear global descriptor table.

  BC         Clear parity checkers.

  BE         Clear screen (optional).

  BF         Check virus and backup reminders.

  C0         Try to boot with INT 19h.

  D0         Interrupt handler error.

  D2         Unknown interrupt error.

  D4         Pending interrupt error.

  D6         Initialize option ROM error.

  D8         Shutdown error.

  DA         Extended memory block move.

  DC         Shutdown error.

  E2         Chipset initialization.

  E4         Forced flash check.

  E5         Status of ROM check.

  E6         BIOS ROM test OK.

  E7         RAM Test.

  E8         OEM Initialisation.

  E9         Initialise programmable interrupt controller.

  EA         Read in bootstrap code.

  EB         Initialise vectors.

  EC         Boot flash program.

  ED         Initialise boot device.

  FF         Boot code read OK.


