This version is capable of writing intel-HEXfile to a 89C51(4kB), 89C52(8kB) and 89C55(20kB). It's suitable and cheapwhich anyone can build easily. Introduction If you need more code spacefor your application, particularly for developing 89Cxx projects with Clanguage, the Easy-Downloader V2.0 is the answer. Programmer for 89C51/52/55 89S51/52 Easy-Downloader V2.0 for ATMEL 89C51/52/55 89S51/52 Wichit Sirichote, Build your own a programmer for writing intel-HEX file to the 89C51, 89C52 and 89C55, PCB file included, Window version UPLOADER EZ3, EZ3.1, modified source code with sdcc.