Post by David Murray on Jan 20, 2005 20:17:32 GMT -5
I have very busy lately and not much time to spend on my DTV. However, in the time I've spend trying to load various old commodore games from disk is that the unit isn't as compatible as I would have imagined. I was thinking of starting a list. Games like Gianasisters and Ms. Pacman just lock up when run and don't do anything at all. Many other games like Qix require joystick port 1, which is unavailable.
Perhaps somebody should start a database of games and utilities known to work and known not to work. That would have saved me a lot of time copying images over from my PC to my 1541. Just in case anybody was wondering if it was my copying of the disks that didn't work, I can say that they all worked on my real Comomdore 64.
Post by Robin Harbron on Jan 20, 2005 23:41:53 GMT -5
Games like Gianasisters and Ms. Pacman just lock up when run and don't do anything at all.
I'd have to look at the particular crack of the game, but it's pretty likely that the decruncher uses illegal opcodes, and that's why it crashes. I know my original Ms. Pacman won't work on the DTV because the loader/copy protection has illegal ops. PM me direct links to these games, and I'll tell you what makes them fail, if I can.
Many other games like Qix require joystick port 1, which is unavailable.
Just like people have started archives of fixed games for other not-entirely-compatible C64 hardware (SuperCPU, IDE64, CMD drives), it'd be neat if someone started one for the DTV.
Fixing the joystick port # is one of the easiest fixes to do, depending on how the game was coded, of course. In fact, some games can be automatically fixed by a Super Snapshot v5 cartridge - maybe some other carts have this feature too. Load the game, freeze it, go into the Game Master menu, and choose "Swap Joystick Ports". If it works, you can then save the snapshot to disk, and then load it on the DTV.
In fact, you can get around the illegal-ops-in-the-depacker problem in the same manner - wait until it decrunches, snapshot it, and away you go. Of course, proper fixes as featured on the DTV ROM are preferable, but this'll do.
Post by Robin Harbron on Jan 21, 2005 1:04:54 GMT -5
I tried both Ms. Pacman and Giana on the DTV. The Remember cracks of both games don't crash, so it must be the depacker on the particular version you're using. If Jeff okays it, I'll post links, otherwise, just do some searching for those
Ms. Pacman does have the problem of using joystick port #1 for a one player game. And Giana has a couple minor graphical glitches, but it's still quite playable. But that's a lot better than "just locks up".
BTW, those of you with SuperCPUs can use it to test for illegal ops. If the program crashes on the DTV, and crashes on the SCPU in 1 mhz mode, chances are really good that illegal ops are causing the problem.
edit: I also tried Empire/Orion's crack of Qix (Taito, 1989) and it works with joystick port 1 or 2 in VICE, no problem.