Acer V.90 Wartungshandbuch PDF herunterladen (Seite 74)

Chapter 4 69

Phoenix BIOS Beep Codes

Code Beeps POST Routine Description

02h Verify Real Mode

03h Disable Non-Maskable Interrupt (NMI)

04h Get CPU type

06h Initialize system hardware

08h Initialize chipset with initial POST values

09h Set IN POST flag

0Ah Initialize CPU registers

0Bh Enable CPU cache

0Ch Initialize caches to initial POST values

0Eh Initialize I/O component

0Fh Initialize the local bus IDE

10h Initialize Power Management

11h Load alternate registers with initial POST

values

12h Restore CPU control word during warm boot

13h Initialize PCI Bus Mastering devices

14h Initialize keyboard controller

16h 1-2-2-3 BIOS ROM checksum

17h Initialize cache before memory autosize

18h 8254 timer initialization

1Ah 8237 DMA controller initialization

1Ch Reset Programmable Interrupt Controller

20h 1-3-1-1 Test DRAM refresh

22h 1-3-1-3 Test 8742 Keyboard Controller

24h Set ES segment register to 4 GB

26h Enable A20 line

28h Autosize DRAM

29h Initialize POST Memory Manager

2Ah Clear 215 KB base RAM

2Ch 1-3-4-1 RAM failure on address line xxxx

2Eh 1-3-4-3 RAM failure on data bits xxxx of low byte of

memory bus

2Fh Enable cache before system BIOS shadow

30h 1-4-1-1 RAM failure on data bits xxxx of high byte of

memory bus

32h Test CPU bus-clock frequency

33h Initialize Phoenix Dispatch Manager

36h Warm start shut down

38h Shadow system BIOS ROM

3Ah Autosize cache

3Ch Advanced configuration of chipset registers

3Dh Load alternate registers with CMOS values

42h Initialize interrupt vectors

45h POST device initialization

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