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add score(初步)

This commit is contained in:
fumiama
2021-03-31 23:29:04 +08:00
parent 7415d0774d
commit 52ac9f147b
9 changed files with 180 additions and 49 deletions

View File

@@ -2,11 +2,6 @@
.require "platform/c64header.oph"
.require "platform/c64kernal.oph"
.data
.org $C000
.space _na 1 ; a的临时存放处
.text
main:
* jsr getin
beq skip
@@ -20,17 +15,4 @@ skip:
end:
rts
printbyte:
sta _na
txa
pha
ldx #8 ; 打印8bit
* lda #$30 ; a = '0'
asl _na ; 左移一位溢出到c
adc #0 ; a = a + c + 0
jsr chrout ; putchar(a)
dex ; x--
bne - ; if(x != 0) goto 上个星号
pla
tax
rts
.require "printbyte.asm"