框架构建完成

2026-06-22 12:11:05 +08:00 · 2021-04-03 19:34:32 +08:00
parent c21a2a1efb
commit f716081ad7
17 changed files with 241 additions and 109 deletions
--- a/delay.asm
+++ b/delay.asm
@@ -0,0 +1,23 @@
+; DELAY routine.  Takes values from the Accumulator and pauses
+; for that many jiffies (1/60th of a second).
+.scope
+.data zp
+.space _tmp 1
+.space _target 1
+.text
+
+delay:  sta _tmp		; save argument (rdtim destroys it)
+		jsr rdtim
+		clc
+		adc _tmp		; add current time to get target
+		sta _target
+*       jsr rdtim
+		cmp _target
+		php
+		jsr getin
+		beq +
+		sta d
+*		plp
+		bmi --			; Buzz until target reached
+		rts
+.scend