DC2N4-LC

DC2N4-LC

https://web.archive.org/web/20080607213015/https://www.luigidifraia.com/c64/dc2n/index.html

16-bit DC2N format generated by RECORD/dump operations respectively:

Each data value is the delay, expressed in clock cycles (at Counter rate), between two consecutive rising (falling) edges of the Commodore computer write line (C2N read line) signal.

0xFFFF is an overflow value, meaning that the next data values should be summed to this one to build up the total delay, up to the first non-0xFFFF value (included). Anyway, we don't really require to deal with that since the dc2nconv software converts DC2N 16-bit files to legacy TAP v1 files, which are already supported by many emulators and tools.

DC2N TAP file resolution (2 MHz) is actually 16 times higher than the legacy TAP format (123.156 kHz).

Dumpeo de un cassette

• Los 12 primeros bytes es la identificación del fichero.
• El siguiente byte, es la version, que está a 0, vaya, que será por que no hay más versiones, o es a modo informativo.
• Los otros dos siguientes, también a 0, que por lo que dice, están reservados, así que, tienen que estar a 0.
• Luego ya son los datos, donde las FF indica espacio en blanco (overflow).