Samsung NP-R20 Series Service Manual

5-538h Shadow system BIOS ROM3Ah Auto size cache3Ch Advanced configuration of chipset registers3Dh Load alternate registers with CMOS values42h Initialize interrupt vectors45h POST device initialization46h 2-1-2-3 Check the ROM copyright notice48h Check the video configuration against CMOS49h Initialize PCI bus and devices4Ah Initialize all video adapters on the system4Bh Quiet Boot start (optional)4Ch Shadow video BIOS ROM4Eh Display the BIOS copyright notice50h Display the CPU type and speed51h Initialize EISA board52h Test the keyboard54h Set key click if enabled58h 2-2-3-1 Test for unexpected interrupts59h Initialize POST display service5Ah Display the prompt "Press F2 to enter SETUP"5Bh Disable CPU cache5Ch Test RAM between 512 and 640 KB60h Test extended memory62h Test extended memory address lines64h Jump to UserPatch166h Configure advanced cache registers67h Initialize Multi Processor APIC68h Enable external and CPU caches69h Setup System Management Mode (SMM) area6Ah Display external L2 cache size6Bh Load custom defaults (optional)6Ch Display shadow-area message6Eh Display possible high address for UMB recovery70h Display error messages72h Check for configuration errors76h Check for keyboard errors7Ch Set up hardware interrupt vectors7Eh Initialize coprocessor if present80h Disable onboard Super I/O ports and IRQs81h Late POST device initialization82h Detect and install external RS232 ports83h Configure non-MCD IDE controllers84h Detect and install external parallel ports85h Initialize PC-compatible PnP ISA devices86h Re-initialize onboard I/O ports.87h Configure Mothe board Configurable Devices88h Initialize BIOS Data Area89h Enable Non-Maskable Interrupts (NMIs)8Ah Initialize Extended BIOS Data Area- This Document can not be used without Samsung's authorization -5. Troubleshooting