HP Vectra Technical Reference Manual page 286

PUSH es
POP OS
MOV OX, offset OUR.-/NT15
INT 21H ,. This MSDOS Int does the work
,.
OUR_INT15:
eMP
AH, F15_SYS_REQ ,. See if it is function 85H?
JNE DO_OLD_INT
PUSHA
PUSH ES
MOV AX, F10_WRS_01 ,. Yes, call video "write string"
MOV BL,07
,. function 1301 H
to
write the
MOV ex, 05 ,. string "HELLO"
MOV BH,OO
,. page
0
MOV
OX,
00
,. row
0,
column
0
PUSH es
POP ES
MOV
BP, Offset HELLO_STR
INT INT_VIDEO ,. Video function interrupt 10H
,...
POP ES
POPA
IRET
OO_OLO.-/NT:
PUSH OLD_OFFSET ,. No, just
go to
regular routine.
PUSH
OLD_SEG
RET
HELLO_STR DB
"HELLO"
F15_WAIT (AH
=
86H)
Calling this function waits the specified number of microseconds (CX,DX) before returning to the
caller.
On Entry: AH
=
F15_WAIT (86H)
CX,DX
=
Number of microseconds to wait. CX is the most significant word.
On Exit:
Carry
=
1, Some other process already waiting. So could not wait.
Carry
=
0, Waited the amount of microseconds specified in the CX,DX register pair.
Registers Altered: None.
System Drivers 277