Operation Frog (Scholastic, 1984)

[toinet]

#1012 - Another eduware from Scholastic. 4am posted a woz-a-day info on twitter, so I checked my files. I had an EDD image from Paul Hagstrom which I transformed into a FDI file to play with OpenEmulator.

Disk structure
There are two sides.
Side B is not copy protected. Side A is. No tracks from T1E to T22.

Protection type
This is a change of epilog markers in the address field on side A (FFFF instead of DEAA)
And T1E-T22 do not contain any data.
A desync protection check at $BB00 on T11.

How to copy
From my copy disk:
- Use Locksmith Fast Disk Backup to copy side B.
- Use Advanced Demuffin 1.4, insert original side 1 in D1, a blank DOS 3.3 disk in D2
- Copy T0/S0 to T1D/SF

How to normalize
Boot my copy disk
Launch Disk Fixer
Read T0/S5
At offset $96: 8D -> EF
Write T0/S5
You're done