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problem in BIOS service

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Join Date: Aug 2008

Posts: 1

Reputation: MZeus is an unknown quantity at this point

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MZeus

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problem in BIOS service

Aug 21st, 2008

I've written the following program

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;print string using bios service
[org 0x0100]
                jmp start
message:        db      'hello world'
 
start:         mov ah, 0x13          ;service 13-printing string
                mov al, 1                ;subservice 01-update cursor
                mov bh, 0                ;output on page 0
                mov bl, 7                ;normal attribute
                mov dx, 0x0A03      ;row 10-column 3
                mov cx, 11            ;length of string
                push cs
                pop es                   ;segment of string
                mov bp, message    ;offset of string
                int 0x10                  ;call bios video services
 
                mov ax, 4c00h
                int 21h
;print string using bios service
[org 0x0100]
                jmp start
message:        db      'hello world'

start:         mov ah, 0x13          ;service 13-printing string
                mov al, 1                ;subservice 01-update cursor
                mov bh, 0                ;output on page 0
                mov bl, 7                ;normal attribute
                mov dx, 0x0A03      ;row 10-column 3
                mov cx, 11            ;length of string
                push cs
                pop es                   ;segment of string
                mov bp, message    ;offset of string
                int 0x10                  ;call bios video services

                mov ax, 4c00h
                int 21h