HP Vectra Technical Reference Manual page 289

OEST
BIOS
STACK
SAMPLE_GOT
SAMPLE_GOT
< 16384,0,0,93H,0> ,. The high byte
: and low word
,. will be loaded
: in the code
<0,0,0,0,0>
<0,0,0,0,0>
-----
BUFFER
DB
16384 OUP (?) ,. Actual destination buffer
Determine how much RAM there is above the first one megabyte of memory.
On Exit: AX
=
Total number of 1KB blocks above one megabyte.
Registers Altered: AX.
F15_ENTELPROT (AH
=
89H)
Allows a routine to enter protected mode. When the BIOS function has executed, the processor
will be in protected mode and the routine specified will be called. The calling program must
create a set of descriptor tables as follows:
Dummy Descriptor Table: Initialize to zero.
Global Descriptor Table: Load program dependant values.
Interrupt Descriptor Table: Load program dependant values.
Data segment Descriptor: Load program dependant values.
Extra segment Descriptor: Load program dependant values.
Stack segment Descriptor: Load program dependant values.
~
Code segment Descriptor: Load program dependant values.
BIOS Descriptor Table: Initialize to zero.
280 System Drivers