;===================================== ; XMAS2018 -- Merry Christmas Part ;===================================== merry: ;=================== ; init screen ;=================== ; init vars lda #15 sta XPOS lda #38 sta YPOS lda #0 sta FRAME sta FRAMEH ;============================= ; Load graphic hgr -- already loaded at $6000 ;============================== ; setup graphics for vapor lock ;============================== jsr vapor_lock ; 6 ; vapor lock returns with us at beginning of hsync in line ; 114 (7410 cycles), so with 5070 lines to go ; so we have 5070 + 4550 = 9620 to kill ; FIXME: clear page0/page1 screens ; jsr gr_copy_to_current ; 6+ 9292 ; now we have 322 left ; GR part bit HIRES ; 4 bit SET_GR ; 4 bit FULLGR ; 4 bit PAGE1 ; 4 ; 9620 ; -12 mode set ; - 3 for jmp ;======= ; 9605 ; Try X=136 Y=14 cycles=9605 ldy #14 ; 2 meloopA:ldx #136 ; 2 meloopB:dex ; 2 bne meloopB ; 2nt/3 dey ; 2 bne meloopA ; 2nt/3 jmp merry_begin_loop .align $100 ;================================================ ; Merry Christmas Loop ;================================================ ; each scan line 65 cycles ; 1 cycle each byte (40cycles) + 25 for horizontal ; Total of 12480 cycles to draw screen ; Vertical blank = 4550 cycles (70 scan lines) ; Total of 17030 cycles to get back to where was merry_begin_loop: merry_display_loop: ; 192 lines of hires page1 ; (192*65) = 12480 ; Try X=24 Y=99 cycles=12475 R5 lda $0 nop ldy #99 ; 2 meloopE:ldx #24 ; 2 meloopF:dex ; 2 bne meloopF ; 2nt/3 dey ; 2 bne meloopE ; 2nt/3 ;====================================================== ; We have 4550 cycles in the vblank, use them wisely ;====================================================== ; do_nothing should be 4550 ; -10 keypress ; =========== ; 4540 ; jsr play_music ; 6+1032 ; Try X=9 Y=89 cycles=4540 ldy #89 ; 2 meloop1:ldx #9 ; 2 meloop2:dex ; 2 bne meloop2 ; 2nt/3 dey ; 2 bne meloop1 ; 2nt/3 ; no keypress = 10+(24) = 34 lda KEYPRESS ; 4 bpl me_no_keypress ; 3 ; -1 jmp me_handle_keypress ; 3 me_no_keypress: jmp merry_display_loop ; 3 me_handle_keypress: bit KEYRESET ; clear keypress ; 4 rts ; 6 .if 0 /* 0 1 2 3 4 5 6 7 00 = $2000 $2400 $2800 $2c00 $3000 $3400 $3800 $3c00 08 = $2080 $2480 $2880 $2c80 $3080 $3480 $3880 $3c80 16 = $2100 $2500 $2900 $2d00 $3100 $3500 $3900 $3d00 24 = $2180 $2580 $2980 $2d80 $3180 $3580 $3980 $3d80 32 = $2200 $2600 $2a00 $2e00 $3200 $3600 $3a00 $3e00 40 = $2280 $2680 $2a80 $2e80 $3280 $3680 $3a80 $3e80 48 = $2300 $2700 $2b00 $2f00 $3300 $3700 $3b00 $3f00 56 = $2380 $2780 $2b80 $2f80 $3380 $3780 $3b80 $3f80 ----- 64 = $2028 $2428 $2828 $2c28 $3028 $3428 $3828 $3c28 72 = $20a8 $24a8 $28a8 $2ca8 $30a8 $34a8 $38a8 $3ca8 80 = $2128 $2528 $2928 $2d28 $3128 $3528 $3928 $3d28 88 = $21a8 $25a8 $29a8 $2da8 $31a8 $35a8 $39a8 $3da8 96 = $2228 $2628 $2a28 $2e28 $3228 $3628 $3a28 $3e28 104 = $22a8 $26a8 $2aa8 $2ea8 $32a8 $36a8 $3aa8 $3ea8 112 = $2328 $2728 $2b28 $2f28 $3328 $3728 $3b28 $3f28 120 = $23a8 $27a8 $2ba8 $2fa8 $33a8 $37a8 $3ba8 $3fa8 ----- 128 = $2050 $2450 $2850 $2c50 $3050 $3450 $3850 $3c50 136 = $20d0 $24d0 $28d0 $2cd0 $30d0 $34d0 $38d0 $3cd0 144 = $2150 $2550 $2950 $2d50 $3150 $3550 $3950 $3d50 152 = $21d0 $25d0 $29d0 $2dd0 $31d0 $35d0 $39d0 $3dd0 160 = $2250 $2650 $2a50 $2e50 $3250 $3650 $3a50 $3e50 168 = $22d0 $26d0 $2ad0 $2ed0 $32d0 $36d0 $3ad0 $3ed0 176 = $2350 $2750 $2b50 $2f50 $3350 $3750 $3b50 $3f50 184 = $23d0 $27d0 $2bd0 $2fd0 $33d0 $37d0 $3bd0 $3fd0 ----- */ int count=0; #define HIGH 0x00 #define CURRENT 0x01 #define NEXT 0x02 #define INL 0xfc #define INH 0xfd #define OUTL 0xfe #define OUTH 0xff //ram[y_indirect(OUTL,y)] scroll_loop: ram[OUTH]=0x40; ram[OUTL]=0x00; ram[INH]=0x60; ram[INL]=0x00; left_one_loop: // printf("%d %02x:%02x\n",count,ram[OUTH],ram[OUTL]); for(y=0;y<40;y++) { ram[CURRENT]=ram[y_indirect(OUTL,y)]; ram[NEXT]=ram[y_indirect(OUTL,y+1)]; if ((count mod 7==2) || (count mod 7==6)) { ram[HIGH]=ram[NEXT]&0x80; } else { ram[HIGH]=ram[CURRENT]&0x80; } if (y==39) ram[NEXT]=ram[y_indirect(INL,0)]; a=ram[NEXT]; and(0x3); asl(); asl(); asl(); asl(); asl(); ram[NEXT]=a; a=ram[CURRENT]; lsr(); lsr(); // current>>=2; and(0x1f); // current&=0x1f; ora_mem(HIGH); ora_mem(NEXT); ram[y_indirect(OUTL,y)]=a; } for(y=0;y<40;y++) { ram[CURRENT]=ram[y_indirect(INL,y)]; ram[NEXT]=ram[y_indirect(INL,y+1)]; if ((count mod 7==2) ||(count mod 7==6)) { ram[HIGH]=ram[NEXT]&0x80; } else { ram[HIGH]=ram[CURRENT]&0x80; } a=ram[NEXT]; and(0x3); asl(); asl(); asl(); asl(); asl(); ram[NEXT]=a; a=ram[CURRENT]; lsr(); lsr(); // current>>=2; and(0x1f); // current&=0x1f; ora_mem(HIGH); ora_mem(NEXT); ram[y_indirect(INL,y)]=a; } clc(); a=ram[INL]; adc(0x80); ram[INL]=a; a=ram[INH]; adc(0x0); ram[INH]=a; clc(); a=ram[OUTL]; adc(0x80); ram[OUTL]=a; a=ram[OUTH]; adc(0x0); ram[OUTH]=a; if (a!=0x60) goto left_one_loop; grsim_update(); ch=grsim_input(); if (ch) goto scroll_done; usleep(17000); // 60Hz = 17ms count++; if (count==140) goto scroll_done; goto scroll_loop; scroll_done: while(1) { ch=grsim_input(); if (ch) break; } return 0; .endif