"Compaq.com - Compaq Presario Series Maintenance and Service Guide - Models: 1683, 1685, 1687, 1688, and 1690

6Bh

 

 

 

Load custom defaults (optional)

 

 

 

 

 

 

 

 

 

 

6Ch

 

 

 

Display shadow-area message

 

 

 

 

 

 

 

 

 

 

6Eh

 

 

 

Display possible high address for UMB recovery

 

 

 

 

 

 

 

 

 

 

70h

 

 

 

Display error messages

 

 

 

 

 

 

 

 

 

 

72h

 

 

 

Check for configuration errors

 

 

 

 

 

 

 

 

 

 

76h

 

 

 

Check for keyboard errors

 

 

 

 

 

 

 

 

 

 

7Ch

 

 

 

Set up hardware interrupt vectors

 

 

 

 

 

 

 

 

 

 

7Eh

 

 

 

Initialize coprocessor if present

 

 

 

 

 

 

 

 

 

 

80h

 

 

 

Disable onboard Super I/O ports and IRQs

 

 

 

 

 

 

 

 

 

 

81h

 

 

 

Late POST device initialization

 

 

 

 

 

 

 

 

 

 

82h

 

 

 

Detect and install external RS232 ports

 

 

 

 

 

 

 

 

 

 

83h

 

 

 

Configure non-MCD IDE controllers

 

 

 

 

 

 

 

 

 

 

84h

 

 

 

Detect and install external parallel ports

 

 

 

 

 

 

 

 

 

 

85h

 

 

 

Initialize PC-compatible PnP ISA devices

 

 

 

 

 

 

 

 

 

 

86h

 

 

 

Reinitialize onboard I/O ports

 

 

 

 

 

 

 

 

 

 

87h

 

 

 

Configure Motherboard Configurable Devices (optional)

 

 

 

 

 

 

 

 

 

 

88h

 

 

 

Initialize BIOS Data Area

 

 

 

 

 

 

 

 

 

 

89h

 

 

 

Enable Non-Maskable Interrupts (NMIs)

 

 

 

 

 

 

 

 

 

 

8Ah

 

 

 

Initialize Extended BIOS Data Area

 

 

 

 

 

 

 

 

 

 

8Bh

 

 

 

Test and initialize PS/2 mouse

 

 

 

 

 

 

 

 

 

 

8Ch

 

 

 

Initialize floppy controller

 

 

 

 

 

 

 

 

 

 

81h

 

 

 

Determine number of ATA drives (optional)

 

 

 

 

 

 

 

 

 

 

90h

 

 

 

Initialize hard disk controllers

 

 

 

 

 

 

 

 

 

 

91h

 

 

 

Initialize local-bus hard disk controllers

 

 

 

 

 

 

 

 

 

 

92h

 

 

 

Jump to UserPatch2

 

 

 

 

 

 

 

 

 

 

93h

 

 

 

Build MPTABLE for multi-processor boards

 

 

 

 

 

 

 

 

 

 

95h

 

 

 

Install CD ROM for boot

 

 

 

 

 

 

 

 

 

 

96h

 

 

 

Clear huge ES segment register

 

 

 

 

 

 

 

 

 

 

97h

 

 

 

Fixup Multi Processor table

 

 

 

 

 

 

 

 

 

 

98h

 

1-2

 

Search for option ROMs. One long, two short beeps on checksum

 

 

failure

 

 

 

 

 

 

 

 

 

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