programb3 - ; load dl with data to be displayed and dl, 0fH...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Appendix B Explanation : Let the 8 bit number be in the AL register. We have to mask the lower nibble, ie we have to separate the lower nibble. In the result only MSB number should remain. For example : eg. : AL = 5B H. 010 1 101 1 Logically AND with F0 H 111 1 000 0 010 1 000 0 = 50 H. Result = 50 H. B is masked Display the result. ØØ Algorithm : Step I : Load the number in AL. Step II : Mask tower nibble i.e. AND AL, 0F0 H. Step III : Display result. Step IV : Stop. ØØ Flowchart : Refer flowchart 3. ØØ Program : .model small Flowchart 3 .data a dw 0012H .code mov ax, @data ; Initialize data section mov ds, ax mov ax, a ; Load number1 in ax and al, 0f0h ; mask lower nibble.Result in al mov ch, 02h ; Count of digits to be displayed mov cl, 04h ; Count to roll by 4 bits mov bh, al ; Result in reg bh l2: rol bh, cl ; roll bl so that msb comes to lsb mov dl, bh
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ; load dl with data to be displayed and dl, 0fH ; get only lsb cmp dl, 09 ; check if digit is 0-9 or letter A-F jbe l4 add dl, 07 ; if letter add 37H else only add 30H l4: add dl, 30H mov ah, 02 ; Function 2 under INT 21H (Display character) int 21H dec ch ; Decrement Count jnz l2 mov ah, 4ch int 21h Microprocessors & Applications (UPTU) Appendix B end Microprocessors & Applications (UPTU) Appendix B Result : C:\programs>tasm lownib.asm Turbo Assembler Version 3.0 Copyright (c) 1988, 1991 Borland International Assembling file: lownib.asm Error messages: None Warning messages: None Passes: 1 Remaining memory: 438k C:\programs>tlink lownib.obj Turbo Link Version 3.0 Copyright (c) 1987, 1990 Borland International Warning: No stack C:\programs>lownib 10 C:\programs>...
View Full Document

This note was uploaded on 08/04/2011 for the course ECON 101 taught by Professor Lucky during the Spring '11 term at Silver Lake.

Page1 / 3

programb3 - ; load dl with data to be displayed and dl, 0fH...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online