Setting up a simple copperlist + 1 Bitplane + ; a simple scrolltext. No (c)ode by aLpHa oNe! ; ============================================= section flashtro,code_c move.l 4.w,a6 ; Get base of exec lib jsr -132(a6) ; Forbid Multitasking lea gfxlib(pc),a1 ; Adress of gfxlib string to a1 jsr -408(a6) ; Call OpenLibrary() move.l d0,gfxbase ; Save base of graphics.library move.l #bitplane,d0 ; Get adress of our bitplane... move.w d0,bplptr+6 ; ...and set up bitplaneregs in copperlist swap d0 ; move.w d0,bplptr+2 ; move.l #cop,$dff080 ; Set new copperlist ;------------------------------------------------------------------------- lea text(pc),a0 ; Adress of our text to a0 loop: bsr.w print ; Call Textroutine moveq #8-1,d7 ; Scrollcounter (-1 coz of dbf loop) scroll: cmp.b #$ff,$dff006 ; Wait VBL bne.b scroll ; lea bitplane+8*50(pc),a1; Scroll area by bitshifting to the left move.l #(8*50)/2,d0 ; Range to scroll, 8*50 bytes shift: roxl.w -(a1) ; divided by 2 coz we shift wordwise dbf d0,shift ; dbf d7,scroll ; Scroll 8 times by one pixel addq.l #1,a0 ; Increase Textptr to next letter move.b #0,bitplane ; Clear 8 Pixels at bitplanestart btst #6,$bfe001 ; Left mouse clicked ? bne.b loop ; No, continue scrollloop! ;------------------------------------------------------------------------- move.l gfxbase(pc),a1 ; Base of graphics.library to a1 move.l 38(a1),$dff080 ; Restore old copperlist jsr -414(a6) ; Call CloseLibrary() jsr -138(a6) ; Permit Multitasking moveq #0,d0 ; Over.. rts ; and out! ; Routine which prints one single letter to a fixed point on bitplane. ; A0 = ptr to text print: move.b (a0),d3 ; Get current letter tst.b d3 ; End of text reached? bne.b noend ; Nah, continue lea text(pc),a0 ; Otherwise a0 points to start of text again move.b (a0),d3 ; Get first letter noend: lea chartab(pc),a1 ; Adress of chartab to a1 moveq #0,d2 ; Counter search: cmp.b (a1,d2),d3 ; Find letter in chartab beq.b foundit ; Letter found? Go on... addq.l #1,d2 ; ..else increase counter bra.b search ; and continue searching foundit:lsl.l #3,d2 ; counter*8 = correct offset to charbuffer lea chars(pc),a3 ; Address of chars to a3 add.l d2,a3 ; + offset to correct letter lea bitplane+48(pc),a2 ; Address of bitplane + 48 (right side) moveq #8-1,d2 ; Height of chars (-1 coz we use dbf loop) copy: move.b (a3)+,(a2) ; Copy the letter add.l #50,a2 ; dbf d2,copy ; rts ; Return to where we came from ;) ; Stuff ; ***** cop: dc.w $0106,$0000,$01fc,$0000 ; AGA compatible dc.w $008e,$1a64,$0090,$ffc4 ; Setting up display, dc.w $0092,$0020,$0094,$00d8 ; modulo and so on dc.w $0102,$0000,$0104,$0000 dc.w $0106,$0000,$0108,$0002 dc.w $0120,$0000,$0122,$0000 ; Clear spriteptrs dc.w $0124,$0000,$0126,$0000 dc.w $0128,$0000,$012a,$0000 dc.w $012c,$0000,$012e,$0000 dc.w $0130,$0000,$0132,$0000 dc.w $0134,$0000,$0136,$0000 dc.w $0138,$0000,$013a,$0000 dc.w $013c,$0000,$013e,$0000 dc.w $0100,$0200 ; No Bitplane dc.w $0180,$0000 ; Color00 = Black dc.w $0182,$0fff ; Color01 = White dc.w $850f,$fffe ; Wait VPos $85 dc.w $0180,$ffff ; Color00 = White dc.w $860f,$fffe ; Wait VPos $86 dc.w $0180,$0312 ; Color00 = Dark Pink ? dc.w $880f,$fffe ; Wait VPos $88 dc.w $0100,$1200 ; 1 Bitplane bplptr: dc.w $00e0,$0000 ; Adress of bpl dc.w $00e2,$0000 dc.w $920f,$fffe ; Wait VPos $92 dc.w $0180,$ffff ; Color00 = White dc.w $930f,$fffe ; Wait VPos $93 dc.w $0180,$0000 ; Color00 = Black dc.w $ffff,$fffe text: dc.b " simple scroller for flashtro " dc.b "tutorial section without use of" dc.b " the blitter! ",0 chartab: dc.b "abcdefghijklmnopqrstuvwxyz!" ; chars as they appear dc.b "0123456789*-. " ; in our char table chars: dc.b $00,$7C,$E6,$E6,$FE,$E6,$E6,$06 ;"A" dc.b $00,$FC,$E6,$FC,$E6,$E6,$FC,$00 ;"B" dc.b $00,$7E,$E6,$E0,$E0,$E6,$7E,$00 ;"C" dc.b $00,$FC,$E6,$E6,$E6,$E6,$FC,$00 ;"D" dc.b $00,$FE,$E6,$F8,$E0,$E6,$FE,$00 ;"E" dc.b $00,$FE,$E6,$F8,$E0,$E0,$E0,$E0 ;"F" dc.b $00,$7C,$E0,$EE,$E6,$E6,$7E,$00 ;"G" dc.b $E0,$E6,$E6,$FE,$E6,$E6,$E6,$06 ;"H" dc.b $00,$FE,$38,$38,$38,$38,$FE,$00 ;"I" dc.b $0E,$0E,$0E,$0E,$0E,$CE,$7C,$00 ;"J" dc.b $E0,$EE,$FC,$F8,$FC,$EE,$E6,$06 ;"K" dc.b $E0,$E0,$E0,$E0,$E0,$E6,$FE,$00 ;"L" dc.b $00,$C6,$EE,$FE,$F6,$E6,$E6,$06 ;"M" dc.b $06,$C6,$E6,$F6,$FE,$EE,$E6,$E0 ;"N" dc.b $00,$7C,$E6,$E6,$E6,$E6,$7C,$00 ;"O" dc.b $00,$FC,$E6,$E6,$FC,$E0,$E0,$E0 ;"P" dc.b $00,$7C,$E6,$E6,$FA,$EC,$76,$06 ;"Q" dc.b $00,$FC,$E6,$E6,$FC,$E6,$E6,$06 ;"R" dc.b $00,$3C,$70,$3C,$0E,$CE,$FC,$00 ;"S" dc.b $00,$FE,$38,$38,$38,$38,$38,$38 ;"T" dc.b $E0,$E6,$E6,$E6,$E6,$E6,$7C,$00 ;"U" dc.b $E0,$E6,$E6,$E6,$6C,$38,$10,$00 ;"V" dc.b $E0,$E6,$E6,$F6,$FE,$EE,$44,$00 ;"W" dc.b $C0,$EE,$7C,$38,$7C,$E6,$E6,$06 ;"X" dc.b $E0,$E6,$E6,$7C,$38,$38,$38,$38 ;"Y" dc.b $00,$FE,$CE,$1C,$70,$E6,$FE,$00 ;"Z" dc.b $38,$38,$38,$38,$38,$00,$38,$00 ;"!" dc.b $00,$7C,$E6,$EE,$F6,$E6,$7C,$00 ;"0" dc.b $00,$F8,$38,$38,$38,$38,$FE,$00 ;"1" dc.b $00,$7C,$0E,$7C,$E0,$E6,$FE,$00 ;"2" dc.b $00,$FC,$CE,$3C,$0E,$CE,$FC,$00 ;"3" dc.b $00,$0E,$1E,$3E,$6E,$FE,$0E,$0E ;"4" dc.b $00,$FC,$E0,$FC,$0E,$CE,$FC,$00 ;"5" dc.b $00,$7C,$E0,$FC,$E6,$E6,$7C,$00 ;"6" dc.b $00,$FE,$CE,$1C,$38,$38,$38,$38 ;"7" dc.b $00,$7C,$E6,$7C,$E6,$E6,$7C,$00 ;"8" dc.b $00,$7C,$CE,$CE,$7E,$0E,$7C,$00 ;"9" dc.b $00,$66,$FF,$FF,$7E,$3C,$18,$00 ;"*" dc.b $00,$00,$00,$00,$FE,$00,$00,$00 ;"-" dc.b $00,$00,$00,$00,$00,$38,$38,$00 ;"." dc.b $00,$00,$00,$00,$00,$00,$00,$00 ;" " bitplane: blk.b 12800,0 ; Space for one ; 400x256 bitplane ; 50 bytes each row ; (400 bits/pixels) gfxlib: dc.b "graphics.library",0,0 gfxbase: dc.l 0
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Comments: 1163Publics: 2786Registration: 06-03-2017
ThankYou Mr.Spiv. I found in one book that command DCB.B could be also use. It depends on type/version assembler. I will check it…
PS
Merry Christmas!!!
ds.b 12800
Hello!!!
Does anybony know how to replace blk.b instruction in a simple way ? I have tried to use multipy dc.b " … " command but it is little unprofessional and it cause extensive growth of the code 🙂
dreams come true 🙂 ,.,, great !
excellent!