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https://github.com/deater/dos33fsprogs.git
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megademo: initial starring intro
This commit is contained in:
Vince Weaver
parent
dc4adbdd1a
commit
32b216a7c0
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@ -3,7 +3,7 @@ include ../Makefile.inc
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DOS33 = ../dos33fs-utils/dos33
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B2D = ../bmp2dhr/b2d
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PNG_TO_40x96 = ../gr-utils/png_to_40x96
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PNG_TO_RLE = ../gr-utils/png2rle
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all: megademo.dsk
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@ -26,6 +26,7 @@ megademo.o: megademo.s \
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gr_hline.s gr_offsets.s vapor_lock.s delay_a.s wait_keypress.s \
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c64_opener.s c64.img.lz4 \
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falling_apple.s apple_40_96.inc \
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starring.s starring1.inc starring2.inc \
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check_email.s email_40_96.inc \
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bird_mountain.s \
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fireworks.s fw_background.inc fw_state_machine.s fw.s \
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@ -43,6 +44,17 @@ apple_40_96.inc: ./images/apple_40_96.png
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email_40_96.inc: ./email_40_96.png
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$(PNG_TO_40x96) asm ./email_40_96.png email > email_40_96.inc
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####
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starring1.inc: ./starring_1.png
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$(PNG_TO_RLE) asm ./starring_1.png starring1 > starring1.inc
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starring2.inc: ./starring_2.png
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$(PNG_TO_RLE) asm ./starring_2.png starring2 > starring2.inc
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####
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c64.img.lz4: c64.img
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@ -25,6 +25,8 @@ apple_iie:
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;===================
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jsr HOME
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jsr starring
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; C64 Opening Sequence
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jsr c64_opener
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@ -34,6 +36,7 @@ apple_iie:
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jsr falling_apple
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; Starring Screens
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jsr starring
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; E-mail arriving
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jsr check_email
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@ -71,6 +74,7 @@ loop_forever:
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.include "lz4_decode.s"
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.include "c64_opener.s"
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.include "falling_apple.s"
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.include "starring.s"
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.include "check_email.s"
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.align $100
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.include "gr_offsets.s"
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216
megademo/starring.s
Normal file
216
megademo/starring.s
Normal file
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@ -0,0 +1,216 @@
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; Display Starring Message
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; 1st screen = triple page flip
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; 2nd/3rd = split low/hires
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starring:
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;===================
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; init screen
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jsr TEXT
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jsr HOME
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bit KEYRESET
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;===================
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; init vars
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lda #0
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sta DRAW_PAGE
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;=============================
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; Load graphic page0
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image to $c00
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lda #<starring1
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sta GBASL
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lda #>starring1
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sta GBASH
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jsr load_rle_gr
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lda #4
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sta DRAW_PAGE
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jsr gr_copy_to_current ; copy to page1
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; GR part
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bit PAGE1
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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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;=============================
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; Load graphic page1
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image to $c00
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lda #<starring2
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sta GBASL
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lda #>starring2
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sta GBASH
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jsr load_rle_gr
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lda #0
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sta DRAW_PAGE
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jsr gr_copy_to_current
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; GR part
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bit PAGE0
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;==============================
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; setup graphics for vapor lock
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;==============================
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jsr vapor_lock ; 6
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; vapor lock returns with us at beginning of hsync in line
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; 114 (7410 cycles), so with 5070 lines to go
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jsr gr_copy_to_current ; 6+ 9292
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; now we have 322 left
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; GR part
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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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; 322 - 12 = 310
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; - 3 for jmp
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; 307
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; Try X=9 Y=6 cycles=307
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ldy #6 ; 2
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stloopA:ldx #9 ; 2
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stloopB:dex ; 2
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bne stloopB ; 2nt/3
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dey ; 2
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bne stloopA ; 2nt/3
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jmp st_begin_loop
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.align $100
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;================================================
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; Starring Loop
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;================================================
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; each scan line 65 cycles
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; 1 cycle each byte (40cycles) + 25 for horizontal
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; Total of 12480 cycles to draw screen
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; Vertical blank = 4550 cycles (70 scan lines)
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; Total of 17030 cycles to get back to where was
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; G00000000000000000000 H0000000000000000000000
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st_begin_loop:
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st_display_loop:
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ldy #24
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st_outer_loop:
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;== line0
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bit PAGE0 ; 4
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lda #$54 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line1
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bit PAGE0 ; 4
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lda #$54 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line2
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bit PAGE0 ; 4
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lda #$55 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line3
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bit PAGE1 ;IIe ; 4
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; bit PAGE0 ;II/II+ ; 4
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lda #$55 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line4
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bit PAGE1 ; 4
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lda #$54 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line5
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bit PAGE1 ; 4
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lda #$54 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line6
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bit PAGE1 ; 4
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lda #$55 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line7
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bit PAGE1 ; 4
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lda #$55 ; 2
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sta draw_line_p2+1 ; 4
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jsr draw_line_2 ; 6
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dey ; 2
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bne st_outer_loop ; 3
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; -1
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;======================================================
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; We have 4550 cycles in the vblank, use them wisely
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;======================================================
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; do_nothing should be 4550
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; +1 fallthrough from above
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; -10 keypress
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; -2 ldy at top
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; -132 move letters
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; ===========
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; 4407
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; Try X=13 Y=62 cycles=4403 R4
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nop ; 2
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nop
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ldy #62 ; 2
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stloop1:ldx #13 ; 2
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stloop2:dex ; 2
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bne stloop2 ; 2nt/3
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dey ; 2
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bne stloop1 ; 2nt/3
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lda KEYPRESS ; 4
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bpl st_no_keypress ; 3
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jmp st_start_over
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st_no_keypress:
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jmp st_display_loop ; 3
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st_start_over:
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bit KEYRESET ; clear keypress ; 4
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rts ; 6
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.include "starring1.inc"
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.include "starring2.inc"
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