Data structure for the ICOM IC-R2 Scanner - OoCities

Appendix A : ICOM's ICF Disk File FormatIcom’s .ICF formatIcom provides a DOS software program (CSR2) to load data into, and downloaddata from the IC-R2. This program stores data files in a .ICF Format. Thisformat is based on the format sent to the IC-R2, with some differences:•=•=•=•=•=•=The file is a text file. That is, it contains lines of ASCII characters, witheach line being terminated with a Carriage Return and Line Feedcombination.There are two extra lines at the beginning. The first contains some datawhich identifies the equipment model, and is used in the set up of the datatransfer process. The second line contains user comments that are readby the Icom CSR2 program.The leading command bytes are not includedThe checksum is not includedThe terminating command byte is not includedThe data is encoded into a character based format. This encoding has tobe removed before the data can be usedThe First Two Lines.The first line in the file contains the model number returned by the radio. Forexample:First Line of ICF File 21270001The second line contains a # sign followed by the user comments contained inthe radio. The ICOM programs use this to provide a description when openingthe file. An example second line is:Second Line of ICF File #User CommentBoth these lines are in normal, unencoded, text.ICF File Coding.The remainder of the ICF file contains the memory data that would be sent to (orreceived from) the radio. Only the starting memory location, length of data, andthe data itself is recorded. The checksum is not recorded in an ICF file. Thedata in an ICF File is encoded using a simple coding system. Lines in an .ICF filelook like this:Encoded .ICF dataHex data after encodingremoved (and with theCarriage Return and LineFeed removed)ggjghghimkggggggggoggmhimmggggggggoggm0030101264000000008006126600000000800628