193

 

 

 

Checkpoint

Beep Code

Description

Code

 

 

 

 

 

7Eh

 

The Coprocessor initialization test. Use the

 

 

floating point instructions to determine if a

 

 

coprocessor exists instead of the ET bit in

 

 

CR0.

 

 

 

80h

 

Disable onboard COM and LPT ports before

 

 

testing for presence of external I/O devices.

 

 

 

81h

 

Run late device initialization routines.

 

 

 

82h

 

Test and identify RS232 ports.

 

 

 

83h

 

Configure Fisk Disk Controller.

 

 

 

84h

 

Test and identify parallel ports.

 

 

 

85h

 

Display any ESCD read errors and configure

 

 

all PnP ISA devices.

 

 

 

86h

 

Initialize onboard I/O and BDA according to

 

 

CMOS and presence of external devices.

 

 

 

87h

 

Initialize motherboard configurable devices.

 

 

 

88h

 

Initialize interrupt controller.

 

 

 

89h

 

Enable NMI.

 

 

 

8Ah

 

Initialize Extended BIOS Data Area and ini-

 

 

tialize the mouse.

 

 

 

8Bh

 

Setup interrupt vector and present bit in

 

 

Equipment byte.

 

 

 

8Ch

 

Initialize both of the floppy disks and dis-

 

 

play an error message if failure was

 

 

detected. Check both drives to establish the

 

 

appropriate diskette types in the BIOS data

 

 

area.

 

 

 

8Fh

 

Count the number of ATA drives in the sys-

 

 

tem and update the number in bdaFdis-

 

 

kcount.

 

 

 

Page 205
Image 205
Acer Altos R710 manual 193