[計(jì)算機(jī)]用16位匯編編寫的彈球游戲-資料下載頁
2025-08-21 15:59本頁面
【正文】 ,[di] test_bit: test ah,10000000b jz next_bit mov al,[si] 。set the pixel push ax push bx call pixel_add call write_pix pop bx pop ax next_bit: sal ah,1 inc cx inc si dec count_8 jz next_byte jmp test_bit 。index to next byte row,if not at end of row next_byte: dec bh jz next_row byte_entry: inc di mov count_8,8 jmp display_byte 。index to next row next_row: 。test for last row dec bl jz to_end mov bh,bytes inc dx mov cx,x jmp byte_entry to_end: ret VARI_PATTERN ENDP 。************************************************************************************ 。 。address putation from x and y pixel coordinates 。on entry: 。 cx=x coordinate of pixel(range 0 to 639) 。 dx=y coordinate of pixel(range 0 to 479) 。on exit: 。 bx=byte offset into video buffer 。 ah=bit mask for rhe write operation(using VGA mode 0 or 2) 。 pixel_add proc near push cx push dx 。pute address push ax push cx mov ax,dx mov cx,80 mul cx mov bx,ax pop ax 。prepare for division mov cl,8 div cl 。add in quotient mov cl,ah mov ah,0 add bx,ax pop ax 。pute bit mask from remainder mov ah,10000000b shr ah,cl 。restore all entry register pop dx pop cx ret pixel_add endp 。******************************************************************************************* 。 。 data_xor proc near mov dx,03ceh mov al,3 out dx,al jmp short $+2 inc dx mov al,00011000b out dx,al jmp short $+2 ret data_xor endp 。******************************************************************************** 。 data_normal proc near mov dx,03ceh mov al,3 out dx,al jmp short $+2 inc dx mov al,00000000b out dx,al jmp short $+2 ret data_normal endp 。******************************************************************************* 。 。display a message on the graphics screen 。On entry: 。 DS:DIAddress if graphics display block 。 graphics_text proc near mov dh,[di] inc di mov dl,[di] mov start_col,dl mov ah,2 mov bh,0 int 10h inc di mov bl,[di] char_write: inc di mov al,[di] cmp al,0ffh je bump_row cmp al,0 jz end_text call show_char jmp char_write end_text: ret bump_row: inc dh mov dl,start_col mov ah,2 mov bh,0 int 10h jmp char_write graphics_text endp 。 。Display character in AL and using the color code in BL show_char proc near mov ah,9 mov bh,0 mov cx,1 int 10h 。Bump cursor inc dl mov ah,2 mov bh,0 int 10h ret show_char endp 。**************************************************************************************** 。 music proc near push di push si push bp push bx freq: mov di,[si] cmp di,1 je end_mus mov bx,ds:[bp] call soundf add si,2 add bp,2 mov ah,6 mov dl,0ffh int 21h jz freq end_mus: pop bx pop bp pop si pop di ret music endp 。 soundf proc near push ax push bx push cx push dx push di mov al,0b6h out 43h,al mov dx,12h mov ax,348ch div di out 42h,al mov al,ah out 42h,al in al,61h mov ah,al or al,3 out 61h,al wait1: mov cx,1500 call waitf dec bx jnz wait1 mov al,ah out 61h,al pop di pop dx pop cx pop bx pop ax ret soundf endp 。 bump_music proc near mov bp,offset bump_time mov si,offset bump_freq call music ret bump_music endp 。************************************************************************ code ends end start
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