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services:tech-info:post-code:c_t
Chips & Technologies
POST-процедуры
| Power on tests | CPU synchronizes with clock. Check the CPU or clock if a failure occurs |
| System ROM Check | The BIOS runs a checksum on itself. Check the BIOS chips if a failure occurs |
| DMA controller Fail | DMA controllers are initialized and tested. Check the DMA chips if a failure occurs |
| System Timer Failed | Channels 0, 1, and 2 are tested in sequence. If a failure occurs, check the PIT chips |
| Base 64K Memory Testing | Walking bit test performed on first 64K of RAM which is critical for the BIOS vector area to be initialized. Check for bad RAM chips or a bad data or address line |
| Interrupt Controller Failed | Test the 8259 chip |
| CPU Still In Protected Mode | Attempts are made to read the configuration of the system through the 8042 keyboard controller |
| Refresh Not Occurring | Memory refresh is tested; standard refresh is 120-140ns. Check the PIT if a failure occurs |
| Keyboard Controller Not Responding | Tests are run on the keyboard controller. the the KBC 8042 if a failure occurs |
| Could Not Enter Protected Mode | BIOS attempts to enter protected mode to test extended memory. Check the 8042 KBC chip or the A20 gate address line if a failure occurs |
| Initialize Timer | Attempts are made to initialize the PIT |
| Initialize DMA Controller | Attempts are made to initialize the DMA controllers |
| Entering/Exiting Protected Mode | The translation is handled by the keyboard controller and the A20 gate address line. Check the keyboard controller if a failure occurs |
| Relocate Shadow RAM | BIOS attempts to shadow itself into extended memory. Check for memory problems if a failure occurs |
| Test For EMS | Check for EMS adapter or an improper CMOS setting/Jumper setting if a failure occurs |
| Test Video Capabilities | Normally includes a memory test on the adapter memory up to 256K |
| Test Memory | Extensive testing of Base, Extended,and Expanded memory. Check for defective memory modules, 8042 KBC, A20 gate address line or an improper CMOS and/or jumper setting |
| Check System Options | The hardware in the system is compared with the values stored in CMOS. The PIT, PIC, 8042 KBC, RTC and other system board components are tested again |
| Peripheral Check and test | Checks are made for the peripherals at standard I/O ports including serial and parallel ports, keyboards, and math coprocessor. You should see an error message on screen at the point if a failure occurs |
| Floppy Test | Floppy devices set in CMOS are checked and initialized. If a bootable floppy is found the fixed disks are tested and the BIOS will boot to the floppy disk. Check for defective controllers or an improper CMOS Setup if a failure occurs |
| Fixed Disk Test | Checks for fixed disks in CMOS. If no bootable floppy in the A: drive, then the BIOS loads the first sector off the first fixed disk and jumps to the area of memory where the sector was loaded. You may just see a flashing cursor or an error message from the potential operating system. Check for improper CMOS Setup, defective controller, or fixed disk failure. Also, check for a corrupt bootloader on the fixed disk |
| Advanced Options | These include the mouse, cache, etc.. you should see an error message on the screen at this point, except that a defective cache may hang the system. In most cases, the cache will be disabled by the BIOS |
POST-коды
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 0A | 0B | 0C | 0D | 0E | 0F |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | |||
| 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 5A | 5B | 5C | 5D | 5E | 5F |
| 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 6A | 6B | 6C | 6D | 6E | 6F |
| 70 | 71 | 72 | |||||||||||||
| 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | ||||||
| A0 | A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | AA | AB | AC | AD | ||
| C0 | C1 | C2 | C3 | ||||||||||||
| код | название | описание |
|---|---|---|
| 00 | Error in POS register | |
| 01 | CPU flag register failed | |
| 02 | CPU register test failed | |
| 03 | BIOS ROM checksum failed | |
| 04 | DMA controller test failed | |
| 05 | System timer IC failed | |
| 06 | Base 64K RAM failed address test: not installed, misconfigured, or bad addressing | |
| 07 | Base 64K RAM failed data test | |
| 08 | Interrupt controller failed | |
| 09 | Hot (unexpected) interrupt occurred | |
| 0A | System timer does not interrupt | |
| 0B | CPU still in protected mode | |
| 0C | DMA page registers failed | |
| 0D | Refresh not occurring | |
| 0E | Keyboard controller not responding | |
| 0F | Could not enter protected mode | |
| 10 | GDT or IDT failed, Keyboard controller failed | |
| 11 | LDT register failed, Keyboard controller failed | |
| 12 | Task register failed, Keyboard controller failed | |
| 13 | LSL instruction failed, keyboard controller failed | |
| 14 | LAR register failed, Keyboard controller failed | |
| 15 | VERR/VERW failed, Keyboard controller failed | |
| 16 | Keyboard controller gate A20 failed | |
| 17 | Exception failed/unexpected exception | |
| 18 | Shutdown during memory test | |
| 19 | Last used error code | |
| 1A | Copyright checksum error | |
| 1B | Shutdown during memory sizing | |
| 1C | Chipset initialization | |
| 50 | Initialize hardware | |
| 51 | Initialize timer | |
| 52 | Initialize DMA controller | |
| 53 | Initialize 8259 programmable interrupt controller | |
| 54 | Initialize system chipset | |
| 55 | Setup EMS configuration | |
| 56 | Entering protected mode for first time | |
| 57 | Size memory chips | |
| 58 | Configure memory chip interleave | |
| 59 | Exiting protected mode for first time | |
| 5A | Determine system board memory size | |
| 5B | Relocate shadow RAM | |
| 5C | Configure EMS | |
| 5D | Set up wait state configuration | |
| 5E | Re-test 64K RAM | |
| 5F | Test shadow RAM | |
| 60 | Test CMOS RAM | |
| 61 | Test video | |
| 62 | Test and initialize DDNIL bits | |
| 63 | Test protected mode interrupt | |
| 64 | Test address line A20 | |
| 65 | Test memory address lines | |
| 66 | Test memory | |
| 67 | Test extended memory | |
| 68 | Test timer interrupt | |
| 69 | Test real time clock (RTC) | |
| 6A | Test keyboard | |
| 6B | Test 80×87 math chip | |
| 6C | Test RS232 serial ports | |
| 6D | Test parallel ports | |
| 6E | Test dual card | |
| 6F | Test floppy drive controller | |
| 70 | Test hard drive controller | |
| 71 | Test keylock | |
| 72 | Test pointing device | |
| 90 | Setup RAM | |
| 91 | Calculate CPU speed | |
| 92 | Check configuration | |
| 93 | Initialize BIOS | |
| 94 | POST Bootstrap | |
| 95 | Reset IC's | |
| 96 | PEAK: System board POS. NEAT/OC8291 ELEAT: Test /initialize cache RAM and controller. | |
| 97 | VGA power on diagnostics and setup | |
| 98 | Adapter BIOS | |
| 99 | Re-initialize DDNIL bits | |
| A0 | Exception 0 | |
| A1 | Exception 1 | |
| A2 | Exception 2 | |
| A3 | Exception 3 | |
| A4 | Exception 4 | |
| A5 | Exception 5 | |
| A6 | Exception 6 | |
| A7 | Exception 7 | |
| A8 | Exception 8 | |
| A9 | Exception 9 | |
| AA | Exception A | |
| AB | Exception B | |
| AC | Exception C | |
| AD | Exception D | |
| C0 | System board memory failure | |
| C1 | I/O channel check activated | |
| C2 | Watchdog timer timeout | |
| C3 | Bus timer timeout |
Звуковые сигналы
services/tech-info/post-code/c_t.txt · Последние изменения: 2012/11/30 10:43 (внешнее изменение)
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