AT89C52扩展外部双口RAM(IDT7132)，在Keil C51环境下测试，和一般的RAM使用方法相当！用串口调试助手观看测试结果-AT89C52 expand external dual-port RAM (IDT7132) Keil C51 in the test environment, and the general use of RAM is! Help with serial debugging watched tes