ami4.txt

经典的BIOS端口开发代码

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AMI-BIOS CHECK-POINT, (C)1991 American Megatrends Inc.,All Rights Reserved
1346 Oakbrook Dr. #120. GA-30093. Phone:[phone], Fax:[phone]
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Checkpoint codes for AMI WinBIOS 

POSTcode     TEST-DESCRIPTION

**************************************************************************
**           UNCOMPRESSED CODE CHECKPOINTS                              **
**************************************************************************

  C2         NMI is Disabled.
             Power on delay starting.

  C5         Power on delay complete.
             Going to enable ROM. i.e. disable Cache if any.

  C6         Calculating ROM BIOS checksum.

  C7         ROM BIOS checksum passed.
             CMOS shutdown register test to be done next.

  C8         CMOS shutdown register test done. CMOS checksum 
             calculation to be done next.

  CA         CMOS checksum calculation is done, CMOS Diag byte 
             written. CMOS status register about to init for Date and Time.

  CB         CMOS status register init done.
             Any initialization before keyboard BAT to be done next.

  CD         BAT command to keyboard controller is to be issued.

  CE         Keyboard controller BAT result verified.
             Any initialization after KB controller BAT to be done next.

  CF         Initialization after KB controller BAT done.
             Keyboard command byte to be written next.

  D1         Keyboard controller command byte is written.
             Going to check pressing of <INS> key during power-on.

  D2         Checking for pressing of <INS> key during power-on done.
             Going to disable DMA and Interrupt controllers.

  D3         DMA controller #1,#2, interrupt controller #1,#2 
             disabled.Video display is disabled and port-B is initialized.
             Chipset init/ auto memory detection about to begin.

  D4         Chipset initialization/ auto memory detection over.
             To uncompress the RUNTIME code.

  D5         RUNTIME code is uncompressed.

  DD         Transfer coontrol to uncompressed code in shadow ram
             at F000:FFF0.

**************************************************************************
**           RUNTIME CODE IS UNCOMPRESSED                               **
**************************************************************************

  01         Processor register test about to start,
             and NMI to be disabled.

  02         NMI is Disabled.
             Power on delay starting.

  03         Power on delay complete.
             To check soft reset/power-on.

  05         Soft reset/power-on determined.
             Going to enable ROM. i.e. disable shadow RAM, Cache if any.

  06         ROM is enabled. Calculating ROM BIOS checksum.

  07         ROM BIOS checksum passed.
             CMOS shutdown register test to be done next.

  08         CMOS shutdown register test done. CMOS checksum calculation
             to be done next.

  09         CMOS checksum calculation is done, CMOS Diag byte written.
             CMOS init. to begin (If "INIT CMOS IN EVERY BOOT IS SET").

  0A         CMOS initialization done (if any).
             CMOS status register about to init for Date and Time.

  0B         CMOS status register init done.
             Any initialization before keyboard BAT to be done next.

  0C         KB controller I/B free.
             Going to issue the BAT command to keyboard controller.

  0D         BAT command to keyboard controller is issued.
             Going to verify the BAT command.

  0E         Keyboard controller BAT result verified.
             Any initialization after KB controller BAT to be done next.

  0F         Initialization after KB controller BAT done.
             Keyboard command byte to be written next.

  10         Keyboard controller command byte is written.
             Going to issue Pin-23,24 blocking/unblocking command.

  11         Pin-23,24 of keyboard controller is blocked/ unblocked.
             Going to check pressing of <INS> key during power-on.

  12         Checking for pressing of <INS> key during power-on done.
             Going to disable DMA and Interrupt controllers.

  13         DMA controller #1,#2, interrupt controller #1,#2 disabled.
             Video display is disabled and port-B is initialized.
             Chipset init/ auto memory detection about to begin.

  14         Chipset initialization/ auto memory detection over.
             To uncompress the POST code if compressed BIOS.

  15         POST code is uncompressed.
             8254 timer test about to start.

  19         8254 timer test over.
             About to start memory refresh test.

  1A         Memory Refresh line is toggling.
             Going to check 15 micro second ON/OFF time.

  20         Memory Refresh period 30 micro second test complete.
             Base 64K memory/address line test about to start.

  21         Address line test passed.
             Going to do toggle parity.

  22         Toggle parity over.
             Going for sequential data R/W test on base 64k memory.

  23         Base 64k sequential data R/W test passed.
             Going to set BIOS stack and to do any setup before Interrupt
             vector init.

  24         Setup required before vector initialzation complete.
             Interrupt vector initialization about to begin.

  25         Interrupt vector initialization done.
             Going to read Input port of 9042 for turbo switch (if any)
             and to clear password if post diag switch is on.

  26         Input port of 8042 is read.
             Going to initialize global data for turbo switch.

  27         Global data initialization for turbo switch is over.
             Any initialization before setting video mode to be done next.

  *************************************************************************
  **                     EISA BIOS CHECKPOINTS                           **
  **       The EISA BIOS checkpoints applies for EISA BIOS only          **
  *************************************************************************
  F0         Initialisation of I/O cards in slots is in progress.

  F1         Extended NMI sources enabling is in progress.

  F2         Extended NMI test is in progress.
  *************************************************************************

  28         Initialization before setting video mode is complete.
             Going for monochrome mode and color mode setting.

  2A         Different BUSes init (system, static, output devices) to
             start if present.
             (Please see Appendix-I for details of different BUSes).

  2B         Toggle parity over. About to give control for any
             setup required before optional video ROM check.

  2C         Processing before video ROM control is done.
             About to look for optional video ROM and give control.

  2D         Optional video ROM control is done. About to give control
             to do any procesing after video ROM returns control.

  2E         Return from processing after the video ROM control.
             If EGA/VGA not found then do display memory R/W test.

  2F         EGA/VGA not found.
             Display memory R/W test about to begin.

  30         Display memory R/W test passed.
             About to look for the retrace checking.

  31         Display memory R/W test or retrace checking failed.
             About to do alternate Display memory R/W test.

  32         Alternate Display memory R/W test passed.
             About to look for the alternate display retrace checking.

  34         Video display checking over.
             Display mode to be set next.

  37         Display mode set.
             Going to display the power on message.

  38         Different BUSes init (input, IPL, general devices) to 
             start if present.
             (Please see Appendix-I for details of different BUSes).

  39         Display different BUSes initialisation error messages.
             (Please see Appendix-I for details of different BUSes).

  *************************************************************************
  **                     EISA BIOS CHECKPOINTS                           **
  **       The EISA BIOS checkpoints applies for EISA BIOS only          **
  *************************************************************************
  F3      Display any slot initialisation error messages
  *************************************************************************

  3A         New cursor position read and saved.
             Going to display the Hit <DEL> message.

  3B         Hit <DEL> message displayed.
             Virtual mode memory test about to start.

  40         Going to prepare the descriptor tables.

  42         Descriptor tables prepared.
             Going to enter in virtual mode for memory test.

  43         Entered in the virtual mode.
             Going to enable interrupts for diagnostics mode.

  44         Interrupts enabled (if diagnostics switch is on).
             Going to initialize data to check memory wrap around at 0:0.

  45         Data initialized. Going to check for memory wrap around at 0:0
             and finding the total system memory size.

  46         Memory wrap around test done. Memory size calculation over.
             About to go for writing patterns to test memory.

  47         Pattern to be tested written in extended memory.
             Going to write patterns in base 640k memory.

  48         Patterns written in base memory.