166
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.
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
Summary of Contents for 4535 5133 - Aspire - Athlon X2 2.1 GHz
Page 6: ...VI ...
Page 44: ...Chapter 2 35 A progress screen displays ...
Page 49: ...40 Chapter 2 2 In DOS mode run the MAC BAT file to write MAC values to eeprom ...
Page 56: ...Chapter 3 47 5 Remove the HDD Cover as shown ...
Page 98: ...Chapter 3 89 4 Lift the bezel away from the panel ...
Page 101: ...92 Chapter 3 4 Lift the LCD Panel out of the casing as shown ...
Page 125: ...116 Chapter 3 4 Replace the single securing screw ...
Page 147: ...138 Chapter 3 ...
Page 194: ...Chapter 6 185 ...
Page 219: ...Appendix A 210 ...
Page 249: ...240 Appendix B ...
Page 251: ...242 Appendix C ...