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AN HC11 FILE MANAGER

Part 2ýAll of the Details
by Walter Krawec

Introduction ý Format() ý Install() ý Directory() ý Run() ý Menu() ý Saving Memory ý Interfacing to the File Manager ý Two Sample Programs ý Conclusion ý Sources and PDF

FORMAT()

The Format() procedure is simple. First, it warns you that formatting will erase all programs with the message Erase all files?[y/n]:. Then it waits for you to answer either "y" or "n." A small loop waits until a character is received from the SCI, then OutCh() echoes the character back.

If you type "y," a zero is stored at address prg_addr. Doing so tells the file manager that there are no programs installed. The file manager also resets the address prg_addrý2. This address holds the next available memory address in the program information block of memory. The Format() procedure sets this to prg_addr+2, which points to the address after the total number of programs definition.

If you hit something other than "y," it prints a new line and exits.

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