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megademo: c64: properly copy text

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This commit is contained in:
Vince Weaver 2018-10-20 22:06:47 -04:00
parent 188b30e4d9
commit 89fd5ef687
1 changed files with 23 additions and 4 deletions
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27
megademo/c64_opener.s
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@ -31,9 +31,9 @@ c64_opener:
lda #$A0 ; regular spaces
jsr clear_gr
lda #<score_text
lda #<apple2_text
sta OUTL
lda #>score_text
lda #>apple2_text
sta OUTH
jsr move_and_print
@ -53,10 +53,21 @@ c64_opener:
; 114 (7410 cycles), so with 5070 + 4550 lines to go (9620)
; - 16 = 9604, -3 for jmp = 9601
; 5070+4550 = 9620
; -16
; -3
; -9298
; =======
; 303
jsr gr_copy_to_current ; 6+ 9292
; Try X=29 Y=2 cycles=303
; Try X=18 Y=100 cycles=9601
ldy #100 ; 2
loopcoA:ldx #18 ; 2
ldy #2 ; 2
loopcoA:ldx #29 ; 2
loopcoB:dex ; 2
bne loopcoB ; 2nt/3
dey ; 2
@ -331,3 +342,11 @@ c64_multiples:
.byte 161,138,115, 92, 69 ,46,23, 0
.byte 0,0,0,0,0,0,0,0
; end is c64_multiples+24
apple2_text:
.byte 16,0
.asciiz "APPLE ]["
.byte 4,20
.asciiz "NONE OF THIS SHOULD BE POSSIBLE,"
.byte 5,21
.asciiz "RACING THE BEAM TO THE EXTREME"