Apple-2-SW/dos33fsprogs
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space_bars: back to where we started

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This commit is contained in:
Vince Weaver 2018-10-08 15:49:13 -04:00
parent 9959b3e2a9
commit 7248064cfa
1 changed files with 19 additions and 20 deletions
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39
space_bars/game.s
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@ -292,24 +292,27 @@ sbloopF:dex ; 2
; do_nothing should be 4550
; -3470 draw_framebuffer
; -793 setup framebuffer
; -533 setup framebuffer
; -21 frame count
; -34 keypress
; -1 adjust center mark back
; ===========
; 231
; 491
; Try X=11 Y=8 cycles=489 R2
; Try X=8 Y=5 cycles=231
nop
ldy #5 ; 2
sbloop1:ldx #8 ; 2
ldy #8 ; 2
sbloop1:ldx #11 ; 2
sbloop2:dex ; 2
bne sbloop2 ; 2nt/3
dey ; 2
bne sbloop1 ; 2nt/3
jsr setup_framebuffer ; 6+787
jsr setup_framebuffer ; 6+527
jsr draw_framebuffer ; 6+3464
@ -521,13 +524,16 @@ offset_lookup:
; .byte 0,1,2,3,4,5,6,7,8,9,10,11,12
; .byte 13,14,15,16,17,18,19,20,21,22,23,24
.byte 25,24
.byte 23,22,21,20,19,18,17,16,15,14,13,12
.byte 11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
; .byte 25,24
; .byte 23,22,21,20,19,18,17,16,15,14,13,12
; .byte 11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
; .byte 13,12,11,10,9,8,7,6,5,4,3,2,1,0
.byte 26,24,22,20,18,16,14,12,10, 8, 6, 4, 2,0
.align $100
; 2 + 60*13 + 5 = 787
; 2 + 40*13 + 5 = 527
setup_framebuffer:
ldx #0 ; 2
setup_fb_loop:
@ -541,24 +547,17 @@ setup_fb_loop:
asl ; 2
asl ; 2
asl ; 2
pha ; 3
;===========
; 28
;============
; 25
lda offset_lookup+1,X ; 4
clc ; 2
adc FRAMEH ; 3
and #$3f ; 2
tay ; 2
pla ; 4
ora raster_texture,y ; 4
ora raster_texture+1,y ; 4
sta FRAMEBUFFER,x ; zp ; 4
inx ; 2
cpx #13 ; 2
bne setup_fb_loop ; 3
;===========
; 32
; 15
; -1
rts ; 6