用8052写的一个LED大屏幕显示程序

				*PADS-ECO-V3.0-METRIC*
				
				*REMARK* -- xsp-data.pcb -- Thu Jun 03 18:12:06 2004
				
				
				*RENNET*
				$$$80 VCC
				$$$130 GND
				*END*
				*PADS-ECO-V3.0-METRIC*
				
				*REMARK* -- xsp-data.pcb -- Thu Jun 03 18:54:57 2004
				
				*END*
				*PADS-ECO-V3.0-METRIC*
				
				*REMARK* -- xsp-data.pcb -- Fri Jun 11 18:45:55 2004
				
				
				*PART*
				U52 517M
				U53 LM2940T-5.0
				*END*
				*PADS-ECO-V3.0-METRIC*
				
				*REMARK* -- xsp-data.pcb -- Fri Jun 11 18:48:02 2004
				
				
				*CHGPART*
				U53 LM2940T-5.0 LM2940T-5.0
				U53 LM2940T-5.0 LM2940T-5.0
				U1 LM2940T-5.0 LM2940T-5.0
				U2 LM2940T-5.0 LM2940T-5.0
				U3 LM2940T-5.0 LM2940T-5.0
				U4 LM2940T-5.0 LM2940T-5.0
				U5 LM2940T-5.0 LM2940T-5.0
				U6 LM2940T-5.0 LM2940T-5.0
				U7 LM2940T-5.0 LM2940T-5.0
				U8 LM2940T-5.0 LM2940T-5.0
				U9 LM2940T-5.0 LM2940T-5.0
				U10 LM2940T-5.0 LM2940T-5.0
				U11 LM2940T-5.0 LM2940T-5.0
				U12 LM2940T-5.0 LM2940T-5.0
				U13 LM2940T-5.0 LM2940T-5.0
				U14 LM2940T-5.0 LM2940T-5.0
				U15 LM2940T-5.0 LM2940T-5.0
				U16 LM2940T-5.0 LM2940T-5.0
				U17 LM2940T-5.0 LM2940T-5.0
				*END*
				*PADS-ECO-V3.0-METRIC*
				
				*REMARK* -- xsp-data.pcb -- Fri Jun 11 18:54:04 2004
				
				*END*