If you use disks, you need this program. Quite simply, if you erase a file accidentally, Unerase will get it back for you. The program is pretty well fool-proof to type in, having not one but two sets of checksums. It's easy to use as well, but there are a couple of points you'll need to watch. Firstly, you can run into problems if there are two erased files of the same name, or if you've written to the disc since erasing the file. Secondly, the program as given here only works on system or vendor format discs. You should use the substitute line 190 if you want Unerase to handle data (ie non-CP/M) format discs.
Other than this substitution, you shouldn't need to modify the program yourself. Indeed, as its author Alexander Clark points out, it is very unwise to try. You'll need to be well up on machine code and disc firmware to achieve anything, and a botched rewrite could easily wipe out important data. As a general precaution against typing errors, try the program out on a disc you could afford to lose data from. If it works, you'll get eg FILE.BAS restored as FILE.ERA - and you'll wonder how you ever got by without it! AA#9 |
