add score(初步)

2026-06-10 21:24:11 +08:00 · 2021-03-31 23:29:04 +08:00
parent 7415d0774d
commit 52ac9f147b
9 changed files with 180 additions and 49 deletions
--- a/print.asm
+++ b/print.asm
@@ -0,0 +1,31 @@
+.macro print
+	pha
+	tya
+	pha
+    lda #<_1	; 取参数的低八位
+    ldy #>_1	; 取参数的高八位
+    jsr printstr
+	pla
+	tay
+	pla
+.macend
+
+; PRINTSTR routine.  Accumulator stores the low byte of the address,
+; X register stores the high byte.
+.scope
+.data zp
+.space _ptr 2
+.text
+printstr:
+    sta _ptr
+    sty _ptr+1
+    ldy #$00
+_lp:
+	lda (_ptr),y
+    beq _done
+    jsr chrout
+    iny
+    bne _lp
+_done:
+	rts
+.scend