Compaq 12XL310 Presario 1200 Series Models XL101-XL113, XL115, XL118-XL127 - M - Page 77

Code 12h 13h 14h 16h 17h 18h 1Ah 1Ch 20h 22h 24h 26h 28h 29h 2Ah 2Ch 2Eh 2Fh 30th 32h 33h 36h 38h 3Ah 3Ch 3Dh 42h 45h 46h 48h Presario 1200 Series Models: XL101-XL113, XL115, XL118-XL127 Beeps 1-2-2-3 POST Routine Description Restore CPU control word during warm boost Initialize PCI Bus Mastering devices Initialize keyboard controller BIOS ROM Checksum Initialize cache before memory autosize 8254 timer initialization 8237 DMA controller initialization Reset Programmable Interrupt Controller Test DRAM refresh Test 8742 Keyboard Controller Set ES segment register to 4 GB Enable A20 line Autosize DRAM Initialize POST Memory Manager Clear 512 KB base RAM RAM failure on address line xxxx*RAM failure on data bits xxxx* of low byte of memory bus Enable cache before system BIOS shadow RAM failure on data bits xxxx*of high byte memory bus Test CPU bus-clock frequency Initialize Phoenix Dispatch Manager Warm start shut down Shadow system BIOS ROM Autosize cache Advanced configuration of chipset registers Load alternate registers with CMOS values Initialize interrupt vectors POST device initialization Check ROM copyright notice Check Video configuration against CMOS Initialize PCI bus and devices PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1200XL SERIES TROUBLESHOOTING 35