Biosin tunnistaminen
There may be up to three identification lines in the BIOS startup screen.
First Identification Line
(1) Processor Type
- ? 8088 or 8086
- ? 80286
- ? 80386
- X 80386SX
- 4 80486
- 5 Pentium
(2) Size of BIOS
- 0 64K
- 1 128K
(4-5) Major Version Number
(6-7) Minor Version Number
(9-14) Reference Number
(16) Halt on POST Error
- 0 Off
- 1 On
(17) Initialize CMOS in every boot
- 0 Off
- 1 On
(18) Block pins 22 and 23 of the keyboard controller
- 0 Off
- 1 On
(19) Mouse support in BIOS/keyboard controller
- 0 Off
- 1 On
(20) Wait for <F1> if error found
- 0 Off
- 1 On
(21) Display floppy error during POST
- 0 Off
- 1 On
(22) Display video error during POST
- 0 Off
- 1 On
(23) Display keyboard error during POST
- 0 Off
- 1 On
(25-26) BIOS Date Month
(27-28) BIOS Date Day
(29-30) BIOS Date Year
(32-39) Chipset Identification / BIOS Name
(41) Keyboard controller version number
Second Identification Line
(1-2) Pin number for clock switching through keyboard controller
(3) Indicates high signal on pin switches clock speed to high or low
- H High
- L Low
(5) Clock switching through chipset registers
- 0 Off
- 1 On
(7-10) Port address to switch clock high
(12-13) Data value to switch clock high
(15-16) Mask value to switch clock high
(18-21) Port address to switch clock low
(23-24) Data value to switch clock low
(26-27) Mask value to switch clock low
(29-31) Pin number for turbo switch
Third Identification Line
(1-2) Keyboard Controller Pin for cache control
(3) Indicates whether high signal on cache control pin enables or disables cache
- H Enable
- L Disable
(5) Indicates if the high signal if used on the keyboard controller pin
- 0 False
- 1 True
(7-9) Cache control through chipset registers
- 0 Cache control off
- 1 Cache control on
(11-12) Port address to enable cache through special port
(14-15) Data value to enable cache through special port
(17-20) Mask value to enable cache through special port
(22-23) Port address to disable cache through special port
(25-26) Data value to disable cache through special port
(28-29) Mask value to disable cache through special port
(31) Pin number for resetting the 82335 memory controller
(33) BIOS modified flag (Incremented each time BIOS is modified)