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space_bars: few lines of framebuffer

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This commit is contained in:
Vince Weaver 2018-10-07 22:59:56 -04:00
parent e81cfcffb1
commit 1b7d83fc72
2 changed files with 77 additions and 5 deletions
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80
space_bars/game.s
View File

@ -15,6 +15,39 @@ game:
sta YPOS
;==================
; setup framebuffer
lda #$12
sta FRAMEBUFFER+0
lda #$34
sta FRAMEBUFFER+1
lda #$56
sta FRAMEBUFFER+2
lda #$78
sta FRAMEBUFFER+3
lda #$9A
sta FRAMEBUFFER+4
lda #$BC
sta FRAMEBUFFER+5
lda #$DE
sta FRAMEBUFFER+6
lda #$F0
sta FRAMEBUFFER+7
lda #$12
sta FRAMEBUFFER+8
lda #$34
sta FRAMEBUFFER+9
lda #$56
sta FRAMEBUFFER+10
lda #$78
sta FRAMEBUFFER+11
lda #$9A
sta FRAMEBUFFER+12
;=============================
; Load graphic hgr
@ -46,6 +79,8 @@ game:
jsr clear_gr
;=============================
; Load graphic page2 $c00
@ -57,6 +92,14 @@ game:
jsr clear_gr
lda #<score_text
sta OUTL
lda #>score_text
sta OUTH
jsr move_and_print
lda #0
sta DRAW_PAGE
@ -260,20 +303,27 @@ sbloopF:dex ; 2
;======================================================
; do_nothing should be 4550
; -853 draw_framebuffer
; -34 keypress
; -1 adjust center mark back
; ===========
; 4515
; 3662
; Try X=5 Y=118 cycles=3659 R3
; Try X=7 Y=97 cycles=3978 R4
; Try X=11 Y=74 cycles=4515
ldy #74 ; 2
sbloop1:ldx #11 ; 2
lda $0
ldy #118 ; 2
sbloop1:ldx #5 ; 2
sbloop2:dex ; 2
bne sbloop2 ; 2nt/3
dey ; 2
bne sbloop1 ; 2nt/3
jsr draw_framebuffer ; 6+527
; no keypress = 10+(24) = 34
; left pressed = 9+8+12+(5)= 34
@ -300,7 +350,7 @@ sb_handle_keypress:
; -1
sb_check_left:
cmp #$15|$80 ; left ; 2
cmp #$08|$80 ; left ; 2
bne sb_check_right ; 3
; -1
dec XPOS ; 5
@ -310,7 +360,7 @@ sb_check_left:
jmp sb_display_loop ; 3
sb_check_right:
cmp #$8|$80 ; 2
cmp #$15|$80 ; 2
bne sb_exit ; 3
; -1
inc XPOS ; 5
@ -324,6 +374,23 @@ sb_exit:
rts ; 6
.align $100
draw_framebuffer:
; 2 + 40*21 + 5 = 847
ldx #40 ; 2
fb_loop:
lda FRAMEBUFFER+11 ; 3
sta $750-1,x ; 5
lda FRAMEBUFFER+12 ; 3
sta $7d0-1,x ; 5
dex ; 2
bne fb_loop ; 3
; -1
rts ; 6
@ -336,3 +403,6 @@ background_hgr:
.incbin "SB_BACKGROUNDC.BIN.lz4",11
background_hgr_end:
score_text:
.byte 0,0
.asciiz "LEVEL:6 LIVES:2 SCORE:001978 HI:002018"

2
space_bars/space_bars.s
View File

@ -151,7 +151,9 @@ gr_offsets:
.include "vapor_lock.s"
.include "delay_a.s"
.include "lz4_decode.s"
.align $100
.include "gr_putsprite.s"
.include "spacebars_title.inc"
.align $100
.include "mode7_sprites.inc"