Search found 125 matches

by malcontent
Mon Jan 16, 2023 10:32 pm
Forum: General Topics
Topic: Jeff's VIC 20 Book
Replies: 268
Views: 27850

Re: Jeff's VIC 20 Book

Can this PDF format support bookmarks? PDF exports often have as an option off any header style formatting. For example, its cover does not offer me to click on any TOC entry to jump to that page. I still have not created bookmarks for the PDF because pages are likely moving around, but I will for ...
by malcontent
Fri Dec 23, 2022 9:34 pm
Forum: Programming
Topic: Addressing into screen memory, how?
Replies: 18
Views: 1427

Re: Addressing into screen memory, how?

Is this an AGC emulator? :shock:
by malcontent
Fri Dec 23, 2022 4:21 pm
Forum: General Topics
Topic: Jeff's VIC 20 Book
Replies: 268
Views: 27850

Re: Jeff's VIC 20 Book

Minor quibble, but Page 94 calls the "illegal" opcodes pseudo-opcodes, when pseudo-opcodes are used for directives to the assembler, not actual opcodes. I would head it under its classic name, and also by the name the current best reference calls them: Unintended "Illegal" Opcode...
by malcontent
Sat Nov 27, 2021 7:26 pm
Forum: Programming
Topic: Colour Memory why does it move?
Replies: 4
Views: 409

Re: Colour Memory why does it move?

Hi, freshlamb, I answered this question in another context: http://sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?t=5572&hilit=changes+base+address&start=21 . In short: the colour RAM is actually 1K nibbles in size. It is not really moved but its use is changed as it is addressed wi...
by malcontent
Tue Sep 14, 2021 2:52 pm
Forum: Programming
Topic: MULTIPLE KEY INPUT
Replies: 12
Views: 1070

Re: MULTIPLE KEY INPUT

See here for more details:

https://codebase64.org/doku.php?id=base ... kernal_way

Discusses 64, but the same principles apply for the VIC.
by malcontent
Sun Sep 05, 2021 7:16 pm
Forum: General Topics
Topic: Famicom-music on VIC-20
Replies: 39
Views: 5748

Re: Famicom-music on VIC-20

That is epic! Any chance of getting some of the music from Solstice? A vic would probably explode attempting that... :P https://www.youtube.com/watch?v=k1A85jN5ca0 Man, I don't know what I was expecting (having not played it), but that title theme absolutely SLAPS. I had to tweak the script a bit t...
by malcontent
Fri Sep 03, 2021 1:15 pm
Forum: Programming
Topic: out of memory
Replies: 9
Views: 594

Re: out of memory

Hard to say without more detail (what line does the error occur on) Out of memory error could also be you running out of stack space. Gosubs eat stack and complex expressions (lots of parenthesis. although maybe that's a ?formula too complex error, i don't remember) so maybe something like that is h...
by malcontent
Wed Jul 28, 2021 10:03 pm
Forum: Programming
Topic: Testing for zero after DEC
Replies: 9
Views: 564

Re: Testing for zero after DEC

Yes, it's unnecessary.
by malcontent
Mon Jul 19, 2021 8:01 pm
Forum: Programming
Topic: a Maze generator program
Replies: 25
Views: 8076

Re: a Maze generator program

Yes, I used the Compute algo for Katabatia (c64) and dropping rooms in later greatly increases how good of a maze it is. It still suffers from a few long passages and zig-zag paths, but it is much better. You can also pre-seed the map with different patterns and the algo will chug away and do it's b...
by malcontent
Sat Jun 26, 2021 3:40 pm
Forum: Games
Topic: Archon - Unexpanded VIC 20 Version
Replies: 19
Views: 3455

Re: Archon - Unexpanded VIC 20 Version

I agree with Jeff: :shock: (It helps that I am also a Jeff, it would be weird to disagree with myself) Insane and impressive.
by malcontent
Fri Apr 30, 2021 11:02 pm
Forum: Games
Topic: Three new games for the unexpanded VIC
Replies: 14
Views: 4091

Re: Three new games for the unexpanded VIC

Looks like a nice LCD game! Though the arms up graphics of "Kong" looks more like he's sitting in front of a vase than it being his body.
by malcontent
Wed Mar 17, 2021 2:26 pm
Forum: Other Systems
Topic: Atari XE: Is it a console or a computer?
Replies: 11
Views: 2719

Re: Atari XE: Is it a console or a computer?

So the VTech Creativision is a computer to you? "The CreatiVision console sported an 8-bit Rockwell 6502 CPU at a speed of 2 MHz, 1KB of RAM and 16KB of Video RAM, and had a graphics resolution of 256 × 192 with 16 colors and 32 sprites. The console had two integrated joystick/membrane keypad ...
by malcontent
Sun Feb 14, 2021 7:43 pm
Forum: Programming
Topic: Flipping a Byte
Replies: 8
Views: 651

Re: Flipping a Byte

Not exactly the same thing, but has some similar requirements but flipping an 8x8 bit matrix along the diagonal is discussed here: http://forum.6502.org/viewtopic.php?f=2&t=6412
by malcontent
Thu Jan 21, 2021 10:02 pm
Forum: Games
Topic: Trolley Problem for Unexpanded VIC
Replies: 17
Views: 1602

Re: Trolley Problem for Unexpanded VIC (WIP)

I agree with the comment on the video, it looks disconcerting to see the trolly make an impossible turn. If you can't actually fit a switching animation in, maybe it would be better to alter the static look of the intersections.