Screen Saver using TSR program in 8086 ALP
Write a TSR program in 8086 ALP to implement Screen Saver. Screen Saver should get activated if the keyboard is idle for 7 seconds. Access the video RAM directly in your routine.
Screen Saver using TSR program in 8086 ALP code
CODE SEGMENT
ASSUME CS:CODE,DS:CODE,ES:CODE
ORG 100H
START : JMP BEGIN
TIMER_IP DW ?
TIMER_CS DW ?
KB_IP DW ?
KB_CS DW ?
FLAG DB 0
CNT DB 180
BUFFER DW 2000 DUP(0)
TIMER:
PUSH AX
PUSH BX
PUSH CX
PUSH DX
PUSH SI
PUSH DI
PUSH DS
PUSH ES
MOV AX,CS
MOV DS,AX
MOV ES,AX
CMP FLAG,00H
JNE TIMER_END
DEC CNT
JNE TIMER_END
CLD
MOV AX,0B800H
MOV DS,AX
MOV SI,0000H
MOV DI,OFFSET BUFFER
MOV CX,2000
REP MOVSW
MOV AX,0B800H
MOV ES,AX
MOV DI,0000H
MOV AL,48
MOV AH,89
MOV CX,2000
REP STOSW
MOV CS:FLAG,01H
TIMER_END:
POP ES
POP DS
POP DI
POP SI
POP DX
POP CX
POP BX
POP AX
JMP DWORD PTR CS:TIMER_IP
KB:
PUSH AX
PUSH BX
PUSH CX
PUSH DX
PUSH SI
PUSH DI
PUSH DS
PUSH ES
MOV AX,CS
MOV DS,AX
MOV ES,AX
MOV CNT,180
CMP FLAG,01
JNE KB_END
CLD
MOV AX,0B800H
MOV ES,AX
MOV SI,OFFSET BUFFER
MOV DI,0000H
MOV CX,2000
REP MOVSW
MOV FLAG,00H
KB_END :
POP ES
POP DS
POP DI
POP SI
POP DX
POP CX
POP BX
POP AX
JMP DWORD PTR CS:KB_IP
BEGIN:
MOV AX,CS
MOV DS,AX
MOV ES,AX
MOV AH,35H
MOV AL,08H
INT 21H
MOV TIMER_IP,BX
MOV TIMER_CS,ES
MOV AH,35H
MOV AL,09H
INT 21H
MOV KB_IP,BX
MOV KB_CS,ES
MOV AH,25H
MOV AL,08H
MOV DX,OFFSET TIMER
INT 21H
MOV AH,25H
MOV AL,09H
MOV DX,OFFSET KB
INT 21H
MOV AH,31H
MOV DX,OFFSET BEGIN
MOV CL,04H
SHR DX,CL
INC DX
INT 21H
CODE ENDS
END START
Yash says
Can you please give me its algorithm and flowchart?
ProjectsGeek says
algorithm and flowchart is not available for this program.
Mahesh says
Thanks this code works properly….but in output it shows black window so please tell me how to change the colour or window
ProjectsGeek says
I don’t think that you can change the colour of window :).