not_my_default_bootloader/software.asm

[org 0x2000]

start:
    mov [bootdev], dl
    mov ah, 06h    ; Scroll up function
    xor al, al     ; Clear entire screen
    xor cx, cx     ; Upper left corner CH=row, CL=column
    mov dx, 184FH  ; lower right corner DH=row, DL=column
    mov bh, 9Eh    ; CHANGE BACKGROUND HERE first back then front
    int 10H         ; execute interrupt

    mov     al, 182         ; meaning that we're about to load
    out     43h, al         ; prepare speaker for output

    mov     ax, 2153        ; frequency countdown value is stored in ax. It is calculated by
    out     42h, al         ; Output low byte.
    mov     al, ah          ; Output high byte.
    out     42h, al

    in      al, 61h
    or      al, 00000011b
    out     61h, al         ; Send the new value
;    mov     bx, 200          ; Pause for duration of note.

mov al, 0
mov ah, 86h
mov cx, 1
mov dx, 200
int 15h

        in      al, 61h         ; Turn off note (get value from
                                ;  port 61h).
        and     al, 11111100b   ; Reset bits 1 and 0.
        out     61h, al         ; Send new value.


       mov ah, 02h ;top bar setting the position and then write title $
        mov bh, 0h
        mov dh, 0h
        mov dl, 20h
        int 10h

        mov si, title
        call print


        mov ah, 02h     ;sets cursor to top to write
        mov bh, 0h
        mov dh, 17h
        mov dl, 2h
        int 10h

        mov si, menuexit
        call print



main:
        mov bx, 1
        mov ah, 06h     ;draw rect on background
        mov cx, 060Fh
        mov dx, 103Bh
        mov bh, 70h ;BACKGROUND OF BOX first back then front
        int 10h
        push dx
        push cx
        mov si, description
        call printinrect
        pop cx
        pop dx
        push dx
        push cx
        call drawshadow
        jmp waitforkey
        pop cx
        pop dx


drawshadow:
        push cx
        push dx
        mov al, dl
        mov ah, ch
        inc ah
        inc al
        mov cx, ax
        mov bl, dl
        mov bh, dh
        inc bl
        inc bh
        mov dx, bx
        mov ah, 06h     ;draw shadow
        mov bh, 1Ch      ;shadow color
        int 10h
        pop dx
        pop cx

        mov al, cl
        mov ah, dh
        inc ah
        inc al
        mov cx, ax
        mov bl, dl
        mov bh, dh
        inc bl
        inc bh
        mov dx, bx
        mov ah, 06h     ;draw shadow
        mov bh, 1Ch	;shadow color
        int 10h

        ret


printinrect:
        mov ax, 0
        mov [writtenchars], ax
        push cx
        mov bx, dx
        push bx
        mov ah, 02h     ;sets cursor to top to write
        mov bh, 0h
        mov dh, ch
        mov dl, cl
        int 10h
.loop:
        mov ax, [writtenchars]
        inc ax
        mov [writtenchars], ax
        lodsb           ; load next char
        mov bh, 0
        mov ah, 0x03
        int 10h         ;read cursor position
        push dx
        pop dx
        pop bx
        cmp dh, bh    ;comp for scroll
        jg .stop
        push bx
        push dx
        or al,al
        jz .exit
        mov bx, [writtenchars]
        cmp bx, [scrollchars]
        jg .writechar
.continue:
        pop dx
        pop bx
        cmp dl, bl      ;if caracter over width of rect
        je .newline     ; go to next line
        push bx
        jmp .loop

.writechar:
        mov ah, 0x0e
        mov bh, 0x00
        mov cx, 0x01
        int 10h         ;write char
        jmp .continue

.stop:
        pop cx
        ret
.exit:
        pop dx
        pop bx
        pop cx
        ret
.newline:
        pop cx
        push bx
        mov dl, cl      ;set column
        inc dh          ;increment row by one, works!
        mov ah, 02h     ;sets cursor
        mov bh, 0h      ;page number 0 constant
        int 10h
        pop bx
        push cx
        push bx
        jmp .loop



print:
        lodsb
        or al,al
        jz .exit
        mov ah,0x0e
        int 10h
        jmp print
        .exit:
        ret


waitforkey:
        mov ah, 0x00
        int 0x16
        cmp ah, 01h
        je exit
	jmp waitforkey

exit:
        in      al, 61h         ; Turn off note (get value from
                                ;  port 61h).
        and     al, 11111100b   ; Reset bits 1 and 0.
        out     61h, al         ; Send new value.
	mov dl, [bootdev]
	jmp 0x0:0x1000

bootdev         db 0x80         ; Boot device number
description db "Poetic Software challenges the default mode of software as a tool where functionality and productivity are predominant through an intervention that involves software as a non-functional, emotional, and cultural object of artistic practice."
scroll db 1
scrollchars dw 0
writtenchars dw 0
menuhelp db "F1  Help", 0
menuselect db "           ",0x18,"/",0x19,"   Select Item",0
menuexit db 0x0D,0x0A,"  ESC Exit", 0
menuenter db "           Enter Select",0

title db "UPSETTING SETTINGS",0