Service Guide
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Code 42h 45h 46h 48h 49h 4Ah 4Bh 4Ch 4Eh 50h 51h 52h 54h 58h 59h 5Ah 5Bh 5Ch 60h 62h ...advanced cache registers Initialize Multi Processor APIC Enable external and CPU caches Setup System Management Mode (SMM) area Display external L2 cache size Load custom defaults (optional) Display shadow-area message Display possible high address for UMB recovery Display error messages Check for configuration errors Check for ... parallel ports Initialize PC-compatible PnP ISA devices Re-initialize onboard I/O ports. Configure Motherboard Configurable Devices (optional) Initialize BIOS Data Area Chapter 4
Code 42h 45h 46h 48h 49h 4Ah 4Bh 4Ch 4Eh 50h 51h 52h 54h 58h 59h 5Ah 5Bh 5Ch 60h 62h ...advanced cache registers Initialize Multi Processor APIC Enable external and CPU caches Setup System Management Mode (SMM) area Display external L2 cache size Load custom defaults (optional) Display shadow-area message Display possible high address for UMB recovery Display error messages Check for configuration errors Check for ... parallel ports Initialize PC-compatible PnP ISA devices Re-initialize onboard I/O ports. Configure Motherboard Configurable Devices (optional) Initialize BIOS Data Area Chapter 4
Service Guide
Page 174
... day Check key lock Initialize Typematic rate Erase F2 prompt Scan for F2 key stroke Enter SETUP Clear Boot flag Check for errors POST done - Code 89h 8Ah 8Bh 8Ch 8Fh 90h 91h 92h 93h 95h 96h 97h 98h 99h 9Ah 9Ch 9Dh 9Eh 9Fh A0h A2h A4h A8h AAh ACh... B9h BAh BBh BCh BDh BEh BFh C0h C1h C2h C3h Beeps 1-2 1 Chapter 4 POST Routine Description Enable Non-Maskable Interrupts (NMIs) Initialize Extended BIOS Data Area Test and initialize PS/2 mouse Initialize floppy controller Determine number of ATA drives (optional) Initialize hard-disk controllers Initialize local-bus hard-disk controllers Jump...
... day Check key lock Initialize Typematic rate Erase F2 prompt Scan for F2 key stroke Enter SETUP Clear Boot flag Check for errors POST done - Code 89h 8Ah 8Bh 8Ch 8Fh 90h 91h 92h 93h 95h 96h 97h 98h 99h 9Ah 9Ch 9Dh 9Eh 9Fh A0h A2h A4h A8h AAh ACh... B9h BAh BBh BCh BDh BEh BFh C0h C1h C2h C3h Beeps 1-2 1 Chapter 4 POST Routine Description Enable Non-Maskable Interrupts (NMIs) Initialize Extended BIOS Data Area Test and initialize PS/2 mouse Initialize floppy controller Determine number of ATA drives (optional) Initialize hard-disk controllers Initialize local-bus hard-disk controllers Jump...
