3 ms·
> Copying this to a new tape or adapting it for use on a disk-based system is straightforward. The easiest way to make a copy is to simply copy both stages to
by marcodiego 4y ago
> Copying this to a new tape or adapting it for use on a disk-based system is straightforward. The easiest way to make a copy is to simply copy both stages to a new tape, without modifying either.
At first I thought: So where is the copy protection? It will just prevent people who don't have double deck cassette player from copying it? You can easily write a routine to read the tape, buffer it to memory and play it back anyways."
The point is: copying with a double deck system will degrade the audio so that it won't work after a few generations and writing a low level routine to buffer the tape and then play it back will make copying it only feasible to dedicated hackers.
Clever.
- abrookewood 4y agoI'm still more impressed by the schemes that prevent you from just copying tape-to-tape or disk to disk. I remember on the C64 some games deliberately put read errors on the tracks, which most copy programs would ignore. If you did a disk-to-disk copy, the duplicate wouldn't boot because it was looking for the read error. I figured out I could use a sector editor to read the error from the original disk, swap them out and then write it to the duplicate - which then worked correctly.