Denial

I ended up not being able to stay the second day. I got back this morning, and am happy to report that it was really fun. I love listening to everyone talk about various things Commodore. I picked up some new fun stuff too: a 1541, JiffyDOS for the 1541, and a ZoomFloppy. Anyway, I took a few photos...

It's coming up! I'll be there at least for most of Saturday. I may potentially be there for the whole event.

It's a challenge seeing something all the way through to completion in this hobby, so congratulations for finishing this project at all. I just played it for a bit with the numpad in VICE, and my only real criticism is that the action seemed a little choppy/fast. If you used software sprites for the...

Yeah, 648 is set after the RAM test on start up and afaik nowhere else in the KERNAL. Obviously that will wipe your memory in the process. As long as the POKE works, that's not too ugly of a solution I guess.

The values stored in the KERNAL's table for $9005 (and bit 7 of $9002 I believe) do indeed position the video matrix elsewhere. Presumably to the positions for the expanded Vic-20, but I haven't verified this myself. For some reason this didn't occur to me before. My apologies. I haven't tested it, ...

I get a 404 on that link.

Bacon wrote:Sounds like a tip that should be in the "ROM calls" sticky thread.

Good idea.

$E5BB (58811): The KERNAL's routine to initialize the VIC registers ($9000-$900F)
$E5B5 (58805): Sets the cursor to the home position and calls $E5BB.

Yup, there's a SYS for that. 58811 initializes the VIC registers from the ROM table. If you also wish to reset the cursor to the home position use 58805.

Nice collection! The 2600 is hard to beat for quick fun. Just reading those titles is giving me that itch to break out the 2600 myself. Playing with a friend is even better, but it's hard to find someone who wants to play Atari when everyone can fulfill their multiplayer needs through online gaming ...

Very, very good. You've done it again, Kweepa!
I was extremely surprised at how playable this is. It's quite the showpiece running on the unexpanded machine.

A blank screen isn't very telling. The 6560 seems to die easier than most chips on the Vic's board. Do you have access to a disk drive? If so you could try blind disk commands and see if you get disk activity. I see the obligatory ray carlsen's troubleshooting guide has not yet been posted, so there...

A little update. Everything seems to work as expected with a non-JiffyDOS equipped drive. And the Jiffy routines seem to function fine on PAL machines (if VICE is anything to go by). So my next order of business is to get the same functionality on NTSC. I really have no idea why it isn't working rig...

Thanks for the response, Jim. Many people ask for the version, as they want a legit copy, but I can't oblige them. Indeed I am one of those people. My motivation is somewhat selfish in that regard. I'm happy to report that I finally have my ROM booting to the BASIC prompt. Things do not work quite a...

One of the biggest mistakes you can make when working with machine language is trying to optimize too early. That applies to both optimizing for memory and optimizing for speed. Just do whatever is most readable until everything works. When you're done you can inline the code if you need speed or wo...