Acer 7230 Bedienungsanleitung PDF herunterladen (Seite 154)

144 Chapter 4

* If the BIOS detects error 2C, 2E, or 30 (base 512K RAM error), it displays an additional word-bitmap (xxxx)

indicating the address line or bits that failed. For example, 2C 0002 means address line 1 (bit one set) has

failed. 2E 1020 means data bits 12 and 5 (bits 12 and 5 set) have failed in the lower 16 bits. Note that error 30

cannot occur on 386SX systems because they have a 16 rather than 32-bit bus. The BIOS also sends the

bitmap to the port-80 LED display. It first displays the check point code, followed by a delay, the high-order

byte, another delay, and then the low-order byte of the error. It repeats this sequence continuously.

C3h Initialize error display function

C4h Initialize system error handler

C5h PnPnd dual CMOS (optional)

C6h Initialize notebook docking (optional)

C7h Initialize notebook docking late

C8h Force check (optional)

C9h Extended checksum (optional)

D2h Unknown interrupt

Code Beeps For Boot Block in Flash ROM

E0h Initialize the chipset

E1h Initialize the bridge

E2h Initialize the CPU

E3h Initialize system timer

E4h Initialize system I/O

E5h Check force recovery boot

E6h Checksum BIOS ROM

E7h Go to BIOS

E8h Set Huge Segment

E9h Initialize Multi Processor

EAh Initialize OEM special code

EBh Initialize PIC and DMA

ECh Initialize Memory type

EDh Initialize Memory size

EEh Shadow Boot Block

EFh System memory test

F0h Initialize interrupt vectors

F1h Initialize Run Time Clock

F2h Initialize video

F3h Initialize System Management Mode

F4h 1 Output one beep before boot

F5h Boot to Mini DOS

F6h Clear Huge Segment

F7h Boot to Full DOS

Code Beeps POST Routine Description

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Acer 7230 Bedienungsanleitung Seite 154