help on TASM video buffer pls

[helpmepls]

Thank u very much dargueta i really appreciate your help i tried the code u showed me, sorry but unfortunately i still cant get it to work. only the right and up was working. when i pressed A and S it went right.



i got it to go left and right using this codes and inserted ur up code but it doesnt seem to work

;THE FORM OF AN ASSEMBLY LANGUAGE PROGRAM
;NOTE: USING SIMPLIFIED SEGMENT DEFINITION
.MODEL SMALL
.STACK 64
.DATA
;DATA FILE ARE LOCATED HERE

.CODE
MAIN PROC FAR
MOV AX,0B800h
MOV DS,AX
;CODE FILES ARE LOCATED HERE
MOV AL,03 ;MAKING YOUR SCREEN 80X25
INT 10H


HULAT:
MOV AH,00
INT 16H

CMP AL,'D'
JNZ HULAT_l
JMP RIGHT
;WAITING FOR A KEY TO BE PRESSED

CMP AL, 'W'
JZ UP

HULAT_l: CMP AL,'d'
JNZ HULAT_a
JMP RIGHT


HULAT_a: CMP AL,'a'
JNZ HULAT_b
JMP LEFT

HULAT_b: CMP AL,'A'
JNZ HULAT_SMALLQ
JMP LEFT





HULAT_SMALLQ: CMP AL,'q'
JNZ HULAT_BIGQ
JMP GWA



HULAT_BIGQ: CMP AL,'Q'
JNZ HULAT
JMP GWA


UP:
mov ax, 0601h
mov bh, 07h
xor cx, cx
mov dx, 184fh
int 10h

LEFT:
MOV BX,0000H ;MOVING THE THIRD LINE
MOV SI,0002H




MOV CX,25 ;REPEATING PROCESS 25 TIMES




STEP1_L: PUSH CX
MOV AL,[BX]

PUSH AX

MoV CX,79

AGAIN_L:
MOV AL,[SI]
MOV BYTE PTR[BX],AL
ADD BX,2
ADD SI,2
LOOP AGAIN_L

POP AX
MOV [BX],AL

ADD BX,0A0H
ADD SI,0A0H
SUB BX,9EH
SUB SI,9EH

POP CX
LOOP STEP1_L
JMP HULAT





RIGHT:
MOV BX,009EH ;MOVING THE THIRD LINE
MOV SI,009CH

MOV AX,0000H


MOV CX,25 ;REPEATING PROCESS 25 TIMES




STEP1_R: PUSH CX
MOV AL,[BX]

PUSH AX

MoV CX,79

AGAIN_R:
MOV AL,[SI]
MOV BYTE PTR[BX],AL
SUB BX,2
SUB SI,2
LOOP AGAIN_R

POP AX
MOV [BX],AL

ADD BX,0A0H
ADD SI,0A0H
ADD BX,9EH
ADD SI,9EH

POP CX
LOOP STEP1_R
JMP HULAT





GWA:



MOV AH,4CH
INT 21H
MAIN ENDP
END MAIN

i also tried doing this code to go up but i cant seem to make it loop. pls help me

.MODEL SMALL
.STACK 64
.DATA
;DATA FILE ARE LOCATED HERE

.CODE
MAIN PROC FAR
MOV AX,0B800h
MOV DS,AX
;CODE FILES ARE LOCATED HERE
MOV AL,03 ;MAKING YOUR SCREEN 80X25
INT 10H


HULAT:
MOV AH,00
INT 16H

CMP AL,'W'
JNZ HULAT_l
JMP UP




HULAT_l: CMP AL,'w'
JNZ HULAT_SMALLQ
JMP UP

HULAT_SMALLQ: CMP AL,'q'
JNZ HULAT_BIGQ
JMP GWA



HULAT_BIGQ: CMP AL,'Q'
JNZ HULAT
JMP GWA



UP:
MOV BX,0A0H
MOV SI,0140H

MOV AX,0A0H


MOV CX,25




STEP1: PUSH CX
MOV AL,[BX]

PUSH AX

MoV CX,79

AGAIN:
MOV AL,[SI]
MOV BYTE PTR[BX],AL
ADD BX,2
ADD SI,2
LOOP AGAIN

POP AX
MOV [BX],AL

ADD BX,0A0H
ADD SI,0A0H
SUB BX,9EH
SUB SI,9EH

POP CX
LOOP STEP1
JMP HULAT


GWA:



MOV AH,4CH
INT 21H
MAIN ENDP
END MAIN

[dargueta]

As far as I can tell, this is what you need to do. Stuff in red is what you need to change, stuff in blue is what you need to add.

;THE FORM OF AN ASSEMBLY LANGUAGE PROGRAM
;NOTE: USING SIMPLIFIED SEGMENT DEFINITION
.MODEL SMALL
.STACK 64
.DATA
;DATA FILE ARE LOCATED HERE

.CODE
    ;CODE FILES ARE LOCATED HERE
    MAIN PROC FAR
    MOV AX,0B800h
    MOV DS,AX

    MOV AL,03 ;MAKING YOUR SCREEN 80X25
    INT 10H


    HULAT:
        ;WAITING FOR A KEY TO BE PRESSED
        MOV AH,00
        INT 16H

        CMP AL,'D'
        JZ RIGHT
        
        CMP AL,'d'
        JZ RIGHT

        CMP AL, 'W'
        JZ UP
        
        
        CMP AL, 'w'
        JZ UP
        
        CMP AL, 'S'
        JZ DOWN

        CMP AL, 's'
        JZ DOWN

        HULAT_a:
            CMP AL,'a'
            JZ LEFT

        HULAT_b:
            CMP AL,'A'
            JZ LEFT

        HULAT_SMALLQ:
            CMP AL,'q'
            JZ GWA

        HULAT_BIGQ:
            CMP AL,'Q'
            JNZ HULAT
            JMP GWA
            
        UP:
            mov ax, 0601h
            mov bh, 07h
            xor cx, cx
            mov dx, 184fh
            int 10h
            JMP HULAT

        DOWN:
            mov ax, 0701h
            mov bh, 07h
            xor cx, cx
            mov dx, 184fh
            int 10h
            JMP HULAT

        LEFT:
            MOV BX,0000H    ;MOVING THE THIRD LINE
            MOV SI,0002H
            MOV CX,25       ;REPEATING PROCESS 25 TIMES

            STEP1_L:
                PUSH CX
                MOV AL,[BX]
                PUSH AX
                MoV CX,79
                AGAIN_L:
                    MOV AL,[SI]
                    MOV BYTE PTR[BX],AL
                    ADD BX,2
                    ADD SI,2
                LOOP AGAIN_L
                POP AX
                MOV [BX],AL
                ADD BX,0A0H
                ADD SI,0A0H
                SUB BX,9EH
                SUB SI,9EH
                POP CX
            LOOP STEP1_L
            JMP HULAT
            
        RIGHT:
            MOV BX,009EH ;MOVING THE THIRD LINE
            MOV SI,009CH
            MOV AX,0000H
            MOV CX,25 ;REPEATING PROCESS 25 TIMES
            STEP1_R:
                PUSH CX
                MOV AL,[BX]
                PUSH AX
                MoV CX,79
                AGAIN_R:
                    MOV AL,[SI]
                    MOV BYTE PTR[BX],AL
                    SUB BX,2
                    SUB SI,2
                    LOOP AGAIN_R
                POP AX
                MOV [BX],AL
                ADD BX,0A0H
                ADD SI,0A0H
                ADD BX,9EH
                ADD SI,9EH
                POP CX
                LOOP STEP1_R
            JMP HULAT
            
        GWA:
            MOV AH,4CH
            INT 21H
MAIN ENDP
END MAIN

[helpmepls]

wow! thank u very much! dargueta i love u!

Ummm... Got last question do you know how to loop the up and down so it doesn't disappear when i go up or down? like the left and right ones?

[dargueta]

Not sure what you're asking. You mean you don't want to scroll the entire screen, but just a portion of it?

[helpmepls]

no, i mean when i scroll completely up right now the words just disappear. i would like that when i scroll up the words loop and reappear at the bottom. like the left and right ones u gave me. when i scroll left the words go left and reappear at the right. i think its loop command like the right and left ones use like this,

AGAIN_R:
MOV AL,[SI]
MOV BYTE PTR[BX],AL
SUB BX,2
SUB SI,2
LOOP AGAIN_R
POP AX
MOV [BX],AL
ADD BX,0A0H
ADD SI,0A0H
ADD BX,9EH
ADD SI,9EH
POP CX
LOOP STEP1_R
but i dont know how to input and make it work it on the program for up and down. sorry for bad english

[dargueta]

Oh, you want it to wrap around? Ok...lemme finish my final exams (I'm done by Friday) and I'll mess around with it.

[helpmepls]

noooo. i need it by tomorrow becoz its our endterm project =( il just try to experiment on it more, hopefully i can get it. i really appreciate your help bro tnx 4 everything. goodluck on ur exams

[dargueta]

Well, I would imagine it's the same as scrolling left or right, but you just need to flip the coordinates around.