Check | Diagnostic LED decoder | Description | |||
point | G=Green, R=Red, O=Orange |
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52 | Off | R | G | R | Update CMOS memory size from memory found in memory test. |
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| Allocates memory for Extended BIOS Data Area from base |
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| memory. |
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60 | Off | R | R | Off | Initialize |
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| rate. |
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75 | Off | O | R | O | Initialize |
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78 | G | R | R | R | Initialize IPL devices controlled by BIOS and option ROMs. |
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7A | G | R | O | R | Initialize remaining option ROMs. |
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7C | G | O | R | R | Generate and write contents of ESCD in NVRam. |
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84 | R | G | Off | Off | Log errors encountered during POST. |
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85 | R | G | Off | G | Display error to the user and gets the user response to error. |
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87 | R | G | G | G | Execute BIOS setup if needed/requested. |
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8C | O | G | Off | Off | Late POST initialization of chipset registers. |
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8D | O | G | Off | G | Build ACPI tables (if ACPI is supported). |
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8E | O | G | G | Off | Program the peripheral parameters. Enable/disable NMI as |
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90 | R | Off | Off | R | Late POST initialization of system management interrupt. |
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A0 | R | Off | R | Off | Check boot password if installed. |
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A1 | R | Off | R | G | |
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A2 | R | Off | O | Off | Take care of runtime image preparation for different BIOS |
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| modules. Fill the free area in F000h segment with 0FFh. |
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| Initializes the Microsoft® IRQ Routing Table. Prepares the |
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| runtime language module. Disables the system configuration |
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| display, if needed. |
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A4 | R | G | R | Off | Initialize runtime language module. |
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A7 | R | G | O | G | Display the system configuration screen, if enabled. Initialize the |
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| CPUs before boot, including the programming of the MTRRs. |
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A8 | O | Off | R | Off | Prepare CPU for operating system boot, including final MTRR |
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| values. |
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A9 | O | Off | R | G | Wait for user input at config display, if needed. |
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AA | O | Off | O | Off | Uninstall POST INT1Ch vector and INT09h vector. |
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| the ADM module. |
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130 | www.gateway.com |