"Market" for old macs?

Jim Leonard wrote: I do remember the incredible feeling of achievement when I cracked the copy protection scheme on the cassette version of Jet Set Willy on the ZX Spectrum. For those who don't remember, it used coloured boxes in a complicated grid to give you a code - it would display "Please enter the code at location A5" and you'd look it up, and type in "3241" or whatever the colours were. In this case I used MERGE to get the loader to load but not run (common trick) and looked at where it jumped off into the machine code. Then I traced it through, using the Z80 opcodes in the back of the very stunningy fine manual, jotting it down, NOPing out a bit here, sticking a RET in there (crude breakpoints), until I discovered - there was nothing terribly clever going on, once it got a code it was happy with it just jumped to another address. No decryption, no magic stack contents (the last thing it did before jumping off was reset the stack pointer), nothing. Change the address in the loader's RANDOMISE USR <wherever> line, and the game started up with no need for the code! Woohoo! So then I copied it onto a ZX Microdrive cart and I was set... I must have been about 13 or 14 at the time. I'm still pretty proud of it, really, my first real crack... Gordon.