This program will dump a block of program code to the 8051 serial port in Intel HEX format.　It was a quick and nasty hack to fulfill a need, however it includes a good checksum calculation routine, which is nice. For simplicity, this program dumps Intel HEX in 16 byte strings only.　Usually, this is not a problem, as I used this code typically for dumping HEX to be disassembled.　It is assumed that the serial port is preconfigured.