Search found 1067 matches
- Fri Sep 22, 2023 2:35 pm
- Forum: Hardware and Tech
- Topic: Making a cheap Power supply.
- Replies: 5
- Views: 2291
Re: Making a cheap Power supply.
I don't think you'll fry something - but it will not work
- Wed Sep 13, 2023 12:08 pm
- Forum: Hardware and Tech
- Topic: I/O0 and illegal opcodes
- Replies: 9
- Views: 2728
Re: I/O0 and illegal opcodes
All the modern loaders doAlso I know the C64-fastloader Spindle uses illegals to do GCR-decoding on the fly which was deemed impossible before.
- Wed Sep 13, 2023 9:53 am
- Forum: Hardware and Tech
- Topic: I/O0 and illegal opcodes
- Replies: 9
- Views: 2728
Re: I/O0 and illegal opcodes
but there does exist software that uses the so-called "illegal opcodes". To add to this: not seldom in old games there are undocumented opcodes executed not because the coder used them intentionally, but because they are a result of accidental memory corruption during development. (This i...
- Sun Sep 10, 2023 11:22 am
- Forum: Other Systems
- Topic: New Release: PETSTRIP for PET/CBM 3032 and 4032
- Replies: 5
- Views: 2227
Re: New Release: PETSTRIP for PET/CBM 3032 and 4032
This is really very cool. Imagine showing this to ppl back in 1980 :=)
- Sun Jul 02, 2023 5:22 pm
- Forum: Programming
- Topic: Need help converting multicolor font from atari to commodore.
- Replies: 1
- Views: 1093
Re: Need help converting multicolor font from atari to commodore.
As said on Lemon - can't you simply use it as is? The binary format should be the same
- Sun Jul 02, 2023 5:37 am
- Forum: Other Systems
- Topic: Help modifying C64 PAL code for NTSC machine
- Replies: 5
- Views: 2345
Re: Help modifying C64 PAL code for NTSC machine
It uses PB7 indeed, and that's L - correct
The problem might indeed be the video source - if the video was deinterlaced, ie is now 25fps, then it will probably not work
The problem might indeed be the video source - if the video was deinterlaced, ie is now 25fps, then it will probably not work
- Sat Jul 01, 2023 7:23 am
- Forum: Other Systems
- Topic: Help modifying C64 PAL code for NTSC machine
- Replies: 5
- Views: 2345
Re: Help modifying C64 PAL code for NTSC machine
Generally on NTSC everything needs to be 20% percent faster (50Hz PAL vs 60Hz NTSC). So, when you you look at the code, there is one delay loop at $c044 which is called with different values in X at various places. So the first/easy attempt is to make this delay loop 20% faster (which then means all...
- Fri Jun 30, 2023 6:49 pm
- Forum: Other Systems
- Topic: Help modifying C64 PAL code for NTSC machine
- Replies: 5
- Views: 2345
Re: Help modifying C64 PAL code for NTSC machine
this is the code to begin with .C:c000 A5 2B LDA $2B .C:c002 85 FC STA $FC .C:c004 A5 2C LDA $2C .C:c006 85 FD STA $FD .C:c008 A9 00 LDA #$00 .C:c00a 8D 03 DD STA $DD03 .C:c00d 20 E4 FF JSR $FFE4 ; check keyboard .C:c010 C9 00 CMP #$00 .C:c012 F0 F9 BEQ $C00D .C:c014 20 4D C0 JSR $C04D .C:c017 20 75...
- Wed Jun 28, 2023 10:33 am
- Forum: Programming
- Topic: Vic-20 mouse driver & demo program for NEOS mouse
- Replies: 54
- Views: 30492
Re: Vic-20 mouse driver & demo program for NEOS mouse
I think you'll have to make sure to plug in the mouse before turning on the computer, and also make sure nothing else uses that joystickport before you run the NEOS program.... its really all a bit unstable
- Sat Jun 17, 2023 8:50 am
- Forum: Hardware and Tech
- Topic: Can you use a 6502B clocked at 1Mhz in a Vic20?
- Replies: 4
- Views: 2946
Re: Can you use a 6502B clocked at 1Mhz in a Vic20?
Its just the maximum clock rating, many MOS chips have this. In a VIC20 (or C64 for that matter) any "A" or "B" (and variants without) can be used
- Sat Jun 17, 2023 8:48 am
- Forum: Programming
- Topic: Loading multiple data files into memory - HELP!!!
- Replies: 8
- Views: 988
Re: Loading multiple data files into memory - HELP!!!
If you are using kernal, you can use one file and patch into the STOP vector (iirc) to update the progress bar (or do whatever during load)
- Wed Jun 14, 2023 7:47 am
- Forum: General Topics
- Topic: Suggestions, please!
- Replies: 6
- Views: 2279
Re: Suggestions, please!
I always found "Capture the flag" somewhat impressive, being such an early title with first person 3D
- Tue May 16, 2023 4:29 am
- Forum: Other Systems
- Topic: 1st ANNIVERSARY: Vision BASIC - New Paperback Edition - Fastest BASIC Compiler !
- Replies: 17
- Views: 3544
Re: 1st ANNIVERSARY: Vision BASIC - New Paperback Edition - Fastest BASIC Compiler !
It's not as exaggerated as you might believe. It's not a question of believing. As said before, anything "hit" would be all across the usual places. Let alone "tremendous hit amongst Commodore 64 programmers, from beginners all the way up to seasoned coders." Vision BASIC does p...
- Tue May 16, 2023 3:55 am
- Forum: Other Systems
- Topic: 1st ANNIVERSARY: Vision BASIC - New Paperback Edition - Fastest BASIC Compiler !
- Replies: 17
- Views: 3544
Re: 1st ANNIVERSARY: Vision BASIC - New Paperback Edition - Fastest BASIC Compiler !
To be honest, most of the time i don't bother, because i am really not that interested in those new games. I see what is being released (and what is not) though :) As for this BASIC compiler, i might take a brief look at it and play around with it for a while, IF it'd be available for free. I wont p...
- Tue May 16, 2023 3:25 am
- Forum: Other Systems
- Topic: 1st ANNIVERSARY: Vision BASIC - New Paperback Edition - Fastest BASIC Compiler !
- Replies: 17
- Views: 3544
Re: 1st ANNIVERSARY: Vision BASIC - New Paperback Edition - Fastest BASIC Compiler !
In other words, don't expect all software to make its way there, especially if the developers step in. Am I wrong about this? Was the above just rhetoric on the part of their admins? a) CSDb is an archive, whatever is released gets an entry, sooner or later. That however doesn't necessarily mean th...