Apple-2-SW/dos33fsprogs
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space_bar: placeholder, working

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This commit is contained in:
Vince Weaver 2018-10-07 23:45:37 -04:00
parent 1b7d83fc72
commit c66c53acd0
1 changed files with 95 additions and 31 deletions
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126
space_bars/game.s
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@ -14,6 +14,27 @@ game:
lda #38
sta YPOS
;=============================
; Load graphic hgr
lda #<background_hgr
sta LZ4_SRC
lda #>background_hgr
sta LZ4_SRC+1
lda #<(background_hgr_end-8) ; skip checksum at end
sta LZ4_END
lda #>(background_hgr_end-8) ; skip checksum at end
sta LZ4_END+1
lda #<$2000
sta LZ4_DST
lda #>$2000
sta LZ4_DST+1
jsr lz4_decode
;==================
; setup framebuffer
@ -48,25 +69,6 @@ game:
;=============================
; Load graphic hgr
lda #<background_hgr
sta LZ4_SRC
lda #>background_hgr
sta LZ4_SRC+1
lda #<(background_hgr_end-8) ; skip checksum at end
sta LZ4_END
lda #>(background_hgr_end-8) ; skip checksum at end
sta LZ4_END+1
lda #<$2000
sta LZ4_DST
lda #>$2000
sta LZ4_DST+1
jsr lz4_decode
;=============================
@ -303,26 +305,25 @@ sbloopF:dex ; 2
;======================================================
; do_nothing should be 4550
; -853 draw_framebuffer
; -3697 draw_framebuffer
; -34 keypress
; -1 adjust center mark back
; ===========
; 3662
; 818
; Try X=5 Y=118 cycles=3659 R3
; Try X=7 Y=97 cycles=3978 R4
; Try X=11 Y=74 cycles=4515
; Try X=53 Y=3 cycles=814 R4
lda $0
nop
nop
ldy #118 ; 2
sbloop1:ldx #5 ; 2
ldy #3 ; 2
sbloop1:ldx #53 ; 2
sbloop2:dex ; 2
bne sbloop2 ; 2nt/3
dey ; 2
bne sbloop1 ; 2nt/3
jsr draw_framebuffer ; 6+527
jsr draw_framebuffer ; 6+3691
; no keypress = 10+(24) = 34
@ -376,18 +377,81 @@ sb_exit:
.align $100
; total =
; 24 wide: = 505
; 28 wide: = 589
; 32 wide: = 673
; 36 wide: = 757
; 40 wide: 2+40*29 = 1162
; 5
;====================================
; 3691
draw_framebuffer:
; 2 + 40*21 + 5 = 847
; 2 + (24*(X*8)+5) -1 =
; 2 + 24*(16+5) -1 = 505
ldx #24 ; 2
fb24_loop:
lda FRAMEBUFFER+2 ; 3
sta $6a8+12-1,x ; 5
lda FRAMEBUFFER+3 ; 3
sta $728+12-1,x ; 5
dex ; 2
bne fb24_loop ; 3
; 2 + (28*(X*8)+5) -1 =
; 2 + 28*(16+5) -1 = 589
ldx #28 ; 2
fb28_loop:
lda FRAMEBUFFER+4 ; 3
sta $7a8+8-1,x ; 5
lda FRAMEBUFFER+5 ; 3
sta $450+8-1,x ; 5
dex ; 2
bne fb28_loop ; 3
; 2 + (32*(X*8)+5) -1 =
; 2 + 32*(16+5) -1 = 673
ldx #32 ; 2
fb32_loop:
lda FRAMEBUFFER+6 ; 3
sta $4d0+4-1,x ; 5
lda FRAMEBUFFER+7 ; 3
sta $550+4-1,x ; 5
dex ; 2
bne fb32_loop ; 3
; 2 + (36*(X*8)+5) -1 =
; 2 + 36*(16+5) -1 = 757
ldx #36 ; 2
fb36_loop:
lda FRAMEBUFFER+8 ; 3
sta $5d0+2-1,x ; 5
lda FRAMEBUFFER+9 ; 3
sta $650+2-1,x ; 5
dex ; 2
bne fb36_loop ; 3
; 2 + (40*(X*8)+5) + 5 = 847
; 2 + 40*(24+5) + 5 = 1167
ldx #40 ; 2
fb_loop:
fb40_loop:
lda FRAMEBUFFER+10 ; 3
sta $6d0-1,x ; 5
lda FRAMEBUFFER+11 ; 3
sta $750-1,x ; 5
lda FRAMEBUFFER+12 ; 3
sta $7d0-1,x ; 5
dex ; 2
bne fb_loop ; 3
bne fb40_loop ; 3
; -1
rts ; 6