ACER Computer GmbH                                     Kornkamp 4
                                                       D-22926 Ahrensburg
                                                       GERMANY
                                                       Tel: 04102 / 488-0
                                                       Fax: 04102 / 488-169

ACER PCI-BIOS  Stand 11/95


POSTcode       TEST-DESCRIPTION

  04           Check CPU ID.
               Dispatch shutdown path.
     
  08           Reset video frame buffer.

  09           Initialize TSC.

  10           DMA test and initialize DMA.

  14           Test and initialize system timer (8237).

  18           Test refresh memory.

  1C           Shutdown CMOS byte test.
               Check CMOS battery.
               Check CMOS checksum.
               Initialize CMOS default setting (if CMOS is bad).
               Initialize RTC (Real-Time Clock) time base.
   
  1D, 1E       Determine DRAM type.

  20           Test keyboard controller (8041/8042) and determine. 
               keyboard type, write default command byte.
     
  21           Initialize SIO.

  2C           Test 128 kB base memory.

  30           Test shadow RAM and set RAM BIOS by CMOS settings.

  34           DRAM sizing.

  3C           Initialize interrupt vectors.

  4C           Initialize ChipUp for CPU checking.

  4F           Isolate PNP cards and initialize PCI VGA card.

  50           Initialize video display.

  58           Set POST screen mode (graphic or text).
               Display Acer (or OEM) logo (if necessary).
               Display Acer copyright message (if necessary).
               Display BIOS serial number.
     
  5C           Test memory.

  5D           Test SM-RAM and initialize SMI handler.

  60           External cache sizing and testing (SRAM and controller).
               Enable internal and exeternal cache (if necessary).
     
  62           Configure system resource.
               Initialize PCI device.
     
  64           Reset keyboard device.
               Check keyboard status.

  68           Check RTC update cycle.

  6C           Reset pointing device.

  70           Test parallel port.

  78           Test math coprocessor.

  7C           Reset pointing device.
               Check pointing device.
     
  80           Set security status.

  84           Initialize keyboard.
               Set keyboard LEDs upon setup requests.     
               Enable keyboard device.
     
  88           HDD test and parameter table setup.

  8A           Initialize HDD enhanced features.

  90           Display POST status (if necessary).

  94           Initialize expansion ROM.
               Shadow I/O ROM for setup request.
               Build up free expansion ROM table.
     
  A0           Initialize timer counter for DOS use.

  A2           Initialize setup items.

  A4           Initialize security feature.

  A8           Setup SMI parameters.

  AC           Enable NMI and parity checking.
               Set video mode.

  B0           Power-on password checking.
               Display configuration mode table.
               Clear memory buffer used for POST.
               Select boot device.
     
  BD           Shutdown 5.

  BE           Shutdown A.

  BF           Shutdown B.



