Search found 4671 matches
- Fri Jun 07, 2013 2:37 pm
- Forum: Programming
- Topic: Screen set 1 character 32 and 96 are both space.
- Replies: 32
- Views: 3890
I did notice that there was a 0 when I LISTed the program. Indeed you get that or a similar (and admittedly useless) result when you run this line on a VIC-20 which has just be powered on. You might want to use this code under other circumstances though ... citing examples would give it away alread...
- Wed Jun 05, 2013 11:53 pm
- Forum: Programming
- Topic: Screen set 1 character 32 and 96 are both space.
- Replies: 32
- Views: 3890
Why did no one think of this back in the day? That looks like a general scheme you like to put questions. People in the past were likely smarter than you might think they have been. DATA loaders with numeric values were an easy method in those days to transcribe a (small) machine code program from ...
- Wed Jun 05, 2013 9:45 am
- Forum: Hardware and Tech
- Topic: TAP player for C64SD Infinity!
- Replies: 2
- Views: 553
- Wed Jun 05, 2013 9:11 am
- Forum: Programming
- Topic: Screen set 1 character 32 and 96 are both space.
- Replies: 32
- Views: 3890
Has anyone ever tried to produce executable machine code by putting characters on the screen? From the CPU's view, there's no difference between RAM committed for screen display and other RAM. I've seen quite a few uses, for example decompressors which execute in the screen buffer to unpack data in...
- Mon Jun 03, 2013 2:36 pm
- Forum: Programming
- Topic: Strange Exponent Issue
- Replies: 5
- Views: 1440
Hi, Nibby99, this thread should shed some more light on this. ;) In short, exponentiation is a much more complex operation than multiplication. For this reason, it is also prone to rounding errors, that's why you get a non-integer result with 7^2. VIC BASIC doesn't do any clever optimization tricks....
- Mon Jun 03, 2013 2:17 pm
- Forum: Emulation and Cross Development
- Topic: Minigrafik GIMP Plugin Development
- Replies: 26
- Views: 10287
Updating some links to files so thought I'd add this one. Some time ago I posted a *.d64 with some other mixed-mode pictures in the thread about the MG batch suite ( link ). Does GIMP allow for a display with non-square pixel aspect ratio? After all, the real resolution of MG pictures is 160x192, n...
- Sat May 25, 2013 12:59 am
- Forum: Games
- Topic: Games With PETSCII Graphics?
- Replies: 14
- Views: 2764
Re: Games With PETSCII Graphics?
What do you guys make of PETSCII? In text mode, PETSCII is quite nice to draw boxes/frames. With other characters you can easily draw progress bars in 2D. Big captions for title screens ( Sokoban , TRON ) ... I also have seen quite impressive pictures drawn from PETSCII characters, on the C64, thou...
- Thu May 23, 2013 2:20 pm
- Forum: Programming
- Topic: Saving Machine Language to tape
- Replies: 12
- Views: 1863
For example if my program was from 6566 to 7168 I would POKE43,0:POKE44,26:POKE55,0:POKE56,28 [...] The last two should read POKE45,0:POKE46,28. POKEs to the addresses 55 and 56 set the top of available memory for BASIC, which in themselves come in quite handy to protect user defined graphics from ...
- Thu May 23, 2013 2:14 pm
- Forum: Collecting and History
- Topic: I did something crazy last night!!
- Replies: 7
- Views: 3510
- Thu May 23, 2013 12:28 pm
- Forum: Programming
- Topic: Saving Machine Language to tape
- Replies: 12
- Views: 1863
There's a nice sticky thread here in the Programming Section about ROM calls and other tricks . Within that thread, SYS57809 to set up file name and device address to load and save blocks of memory was pointed out in this post dating from 2006. From assembly the KERNAL routines SETLFS ($FFBA) and SE...
- Tue May 21, 2013 12:17 pm
- Forum: General Topics
- Topic: New demo - "Lipstick traces" by Orb (unexpanded)
- Replies: 12
- Views: 2993
- Tue May 21, 2013 11:16 am
- Forum: General Topics
- Topic: How Do you Go About Converting a TAP to PRG?
- Replies: 14
- Views: 1640
- Mon May 20, 2013 9:25 am
- Forum: Emulation and Cross Development
- Topic: CBM prg Studio
- Replies: 239
- Views: 155581
- Sun May 19, 2013 1:42 am
- Forum: General Topics
- Topic: How Do you Go About Converting a TAP to PRG?
- Replies: 14
- Views: 1640
Re: How Do you Go About Converting a TAP to PRG?
Pedro, Unless the game has no protection, the type of conversion you want to do is more or less a matter of cracking the software you want to convert. just to give you a small hint at what is involved in this: - one would at first simply load in the game as normal, checking the type of the autostart...
- Sat May 18, 2013 4:14 am
- Forum: Hardware and Tech
- Topic: vic-1110 8k ram cart upgrade (and other solutions)
- Replies: 59
- Views: 10846
This is probably for compatibility with self modifying code cartridges but as demonstrated with the game Crazy Antics, you MUST place in read-only mode ALL the RAM for full compatibility with dumped cartridges. I had to try this out. With the NTSC dump on zimmers, I could successfully run K-razy An...