To Adam Zhao,

If you are a newbie in microcontroller, I have a small software in DOS version (but tested work well in Win98 and WinXP) that might help you exploring on AT89S51 and AT89S52. I compiled this software under Pascal 5 and all you have to do is download this software, unzip, and run it. That's all, no need to install anything and you can carry this software in one floppy anywhere you want.

You can get this software from this website, go to Code Library, and find EaseMicro51. Or you can go to my website at http://te.ubaya.ac.id/~eka and find it under EaseMicro51, but you need to register first before you can download it. You can read also on how to use this software.

This software basicaly is an assembler editor powered by Another Editor, the cross-assembler compiler from MetaLink, and the ISP uploader from AEC Electronic. All in one package, just run Ease51.bat and press F1 for help. The cable schamtic is there as well (no additional components are needed, just one resistor for reseting process). It is a very simple text editor but powerfull enough with feature of copy, cut, and paste. Just make sure you read the help screen by pressing F1.

I hope this would help. Thanks.

Best,

Ekawahyu Susilo