HP Vectra Reference Manual page 71

,Address
Range INT BIOS Entry Summary
48-4B 12 DETERMINE
Reports the number
MEMORY SIZE of contiguous 1Kb
blocks of memory.
4C-4F 13 DISKETIE INT Reset, status, read,
write, verify, format,
read DASD, read
change line, and set
DASD.
50-53
14 RS232
10
Initialize port, read
character, write
character read
status.
54-57 15 CASSETIE
10 &
Device open, device
80286 FUNCTIONS
close, program
termination, event
wait, joystick
support, system
request key, wait,
move block,
determines extended
memory size,
processor to virtual
mode, device busy
loop, and interrupt
complete flag set.
58-5B 16 KEYBOARD
10
Read character, read
buffer status, read
shift status.
5C-5F 17 PRINTER
10
Initialize port, print
character, read
status.
64-67 19 BOOTSTRAP Power up code.
68-6B lA TIME OF DAY Read and write
clock, time, date, set
and reset alarm.
54 Basic Input/Output System