时基设置
1.设置时基定时1.024ms，不产生中断
lda P_BUZ_Ctrl and #$0F ora #C_TBASE_Div_8k sta P_BUZ_Ctrl
2.设置时基定时1.024，产生中断
lda P_BUZ_Ctrl and #$0F ora #C_TBASE_Div_8k sta P_BUZ_Ctrl set P_INT_Flag2,CB_INT_ITVALIF set P_INT_Ctrl2,CB_INT_ITVALIE ; Enable Interval Timer interrupt cli ; enable INT
