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graphics.asm
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graphics.asm
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* vi:ts=8
*
****************
XDEF putchar
XDEF del_all
XDEF del_chr 8x16 Only!
XDEF del_bol 8x16 Only!
XDEF del_eol 8x16 Only!
XDEF scl_up
XDEF scl_dn
INCLUDE 'conout.i'
Section TEXT
putchar:
move.l v_cur_ad(a5),a0
move.l v_fnt_ad(a6),a1
asl.w #4,d0
lea 0(a1,d0.w),a1
move.b (a1)+,0(a0)
move.b (a1)+,80(a0)
move.b (a1)+,160(a0)
move.b (a1)+,240(a0)
move.b (a1)+,320(a0)
move.b (a1)+,400(a0)
move.b (a1)+,480(a0)
move.b (a1)+,560(a0)
move.b (a1)+,640(a0)
move.b (a1)+,720(a0)
move.b (a1)+,800(a0)
move.b (a1)+,880(a0)
move.b (a1)+,960(a0)
move.b (a1)+,1040(a0)
move.b (a1)+,1120(a0)
move.b (a1)+,1200(a0)
rts
****************
del_all:
move.l v_scr_top(a6),a0
cmp.l v_scr_bot(a6),a0
bge 2$
1$: clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
cmp.l v_scr_bot(a6),a0
blt 1$
2$: rts
del_chr:
move.l v_cur_ad(a5),a0
move.w v_cel_mx(a6),d0
sub.w v_cur_cx(a6),d0
subq.w #1,d0
bmi 2$
1$: move.b 81(a0),80(a0)
move.b 161(a0),160(a0)
move.b 241(a0),240(a0)
move.b 321(a0),320(a0)
move.b 401(a0),400(a0)
move.b 481(a0),480(a0)
move.b 561(a0),560(a0)
move.b 641(a0),640(a0)
move.b 721(a0),720(a0)
move.b 801(a0),800(a0)
move.b 881(a0),880(a0)
move.b 961(a0),960(a0)
move.b 1041(a0),1040(a0)
move.b 1121(a0),1120(a0)
move.b 1(a0),(a0)+
dbra d0,1$
2$: clr.b 0(a0)
clr.b 80(a0)
clr.b 160(a0)
clr.b 240(a0)
clr.b 320(a0)
clr.b 400(a0)
clr.b 480(a0)
clr.b 560(a0)
clr.b 640(a0)
clr.b 720(a0)
clr.b 800(a0)
clr.b 880(a0)
clr.b 960(a0)
clr.b 1040(a0)
clr.b 1120(a0)
clr.b 1200(a0)
rts
del_bol:
move.l v_cur_ad(a5),a0
move.w v_cur_cx(a6),d0
sub.w d0,a0
subq.w #1,d0
bmi 2$
1$: clr.b 80(a0)
clr.b 160(a0)
clr.b 240(a0)
clr.b 320(a0)
clr.b 400(a0)
clr.b 480(a0)
clr.b 560(a0)
clr.b 640(a0)
clr.b 720(a0)
clr.b 800(a0)
clr.b 880(a0)
clr.b 960(a0)
clr.b 1040(a0)
clr.b 1120(a0)
clr.b 1200(a0)
clr.b (a0)+
dbra d0,1$
2$: rts
del_eol:
move.l v_cur_ad(a5),a0
move.w v_cel_mx(a6),d0
sub.w v_cur_cx(a6),d0
1$: clr.b 80(a0)
clr.b 160(a0)
clr.b 240(a0)
clr.b 320(a0)
clr.b 400(a0)
clr.b 480(a0)
clr.b 560(a0)
clr.b 640(a0)
clr.b 720(a0)
clr.b 800(a0)
clr.b 880(a0)
clr.b 960(a0)
clr.b 1040(a0)
clr.b 1120(a0)
clr.b 1200(a0)
clr.b (a0)+
dbra d0,1$
2$: rts
****************
scl_up: move.l v_scr_top(a6),a0
lea 0(a0),a1
add.w v_cel_wr(a6),a1
cmp.l v_scr_bot(a6),a1
beq 2$
1$: move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
move.l (a1)+,(a0)+
cmp.l v_scr_bot(a6),a1
blt 1$
2$: clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
clr.l (a0)+
cmp.l v_scr_bot(a6),a0
blt 2$
3$: rts
scl_dn: move.l v_scr_bot(a6),a0
lea 0(a0),a1
sub.w v_cel_wr(a6),a1
cmp.l v_scr_top(a6),a1
beq 2$
1$: move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
move.l -(a1),-(a0)
cmp.l v_scr_top(a6),a1
bgt 1$
2$: clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
clr.l -(a0)
cmp.l v_scr_top(a6),a0
bgt 2$
3$: rts
END