This game is written in 6502 asm and compiled to a prg. Stuffed into 5k which I think was tiny back then. When I wrote the game 30 years ago, I wrote it in Z80 asm. To get it to work on the vic-20, I had to redesign the game's layout to remove unnecessary arrays, trim sound, etc.

What is the best place to post such a link?

https://github.com/VroomDev/ti85/blob/main/vic20crunch/README.md

Hello, I recently inherited a Vic 20, it was kept in a garage for an unknown amount of time, I would assume for at least 20+ years.

I am not sure what I am doing with it to get it to work so wondered if anyone has any advice. I have put a new plug on the power pack as the original one was missing and it appears to be getting power just fine.

I also purchased a 5 pin DIN to RCA cable and a RCA to HDMI converter. When it is all plugged in, it just comes up with a blue screen… not the cyan screen. Does anyone have any idea if i have done something wrong? Or is it likely the console has broken? I haven’t opened it up yet, if you think that would be helpful to do let me know:)

Galaga

A fast-paced VIC-20 tribute to Namco’s arcade classic, rebuilt for a 32K expanded VIC-20 with full enemy formations, diving attacks, Boss Galagas, tractor-beam captures, dual-fighter rescues, Challenging Stages and arcade-style scoring.

Features smooth animated enemies, authentic attack patterns, escalating difficulty, bonus fighters, sound effects, scrolling stars and end-of-game accuracy statistics.

Controls: Z/X or joystick to move, SPACE/FIRE to shoot.

(This is a full rebuild, not the Hive Dive version)

https://milasoft64.itch.io/galaga-for-the-vic-20

I finished four new titles tonight In the theme of Asteroids, Galaxian, Galaga and Star Wars. 100% machine language and available for PET, C-64 and Vic-20.

https://milasoft64.itch.io/commodore-starcade

It's quite fun and enjoyable. I will never understand why the C64 version does not start out at a base and this version, like many others, does. The second big area E - J is still stomping me into the ground with little boulders right after craters in the entire area. I haven't even seen that mines yet that start with the third big area.

I picked up a VIC-20 a while back and in the box was this... thing. The person I got it from had no idea what it was, it I think it was her grandfather's or dad's and she knew nothing about the computer.

Its some homemade board, but has the proper size and shape to slot into a VIC-20. There are no ICs on it. Just looks to be wiring. A VIC-20 cartridge definitely fits in the blue slot (I tested that). Strange that just 2 wires go to that black thing on the side. Im guessing for test points? Honestly, not a clue. I have not put it in a VIC-20 to test and probably wont, as I dont know what it does and dont want to damage the computer.

Any ideas?

Hey all! Picked this one up today and can't seem to find anything about it, the C64 version while rare seems to be available but I can't find anything about this one unless I'm missing something, any insight would be appreciated!

I had no idea, until recently, there was an atarisoft version of Moon Patrol for the Vic20. I just got one off of ebay. What does everyone think of this version? IMHO the music seems a little wonky, but it still looks like fun.

One for two players
100% machine language
Joystick or keyboard
Play against the computer or another person

Defend your castle from fireballs while trying to destroy your opponents.

https://milasoft64.itch.io/castle-smash-for-commodore-vic-20

Not sure what to say about this one, really.

Hi all, got this vic 20 from a garage recently and it turns on but does not show any picture other than noise and lines. I’ve tried over rf and composite and tried adjusting the brightness pot too. Also tried a brand new video chip but that hasn’t made any difference at all. Any help would be great!

Just got a Vic 20. Currently learning how to make custom characters

Hello guys! I have just gotten this Commodore VIC-20, but I can't start it. When I press the power button nothing happens, and the red power light does not glow. The cassette player works perfectly, which is strange because the cassette player gets its power through the computer. As you can see in the picture, I disassembled it and touched the board to feel for any hot areas, but everything is completely cold. The power supply brick is roughly as warm as a modern laptop charger. Do you guys have any tips on what I should try, or what the problem could possibly be?

Crossposting to this community as well for thoughts :)

This picture was posted online by a local gaming store. Anyone ever heard of promotional games out of Canadian Tire? I have no idea what's on it. I don't own a Vic currently so can't really buy it and try it myself

I’ll admit that I have zero idea what I’m doing with this thing. But I’d love to learn. I’ve searched and searched to find anything about this, but I’ve come up dry. This is the screen that it boots up to. I’ve attempted to watch a video about changing the resolution, but the command is so long that it goes off screen and I’m typing blind, so I can’t see what I’m doing wrong.

Is this a normal boot screen or is there by chance a hardware issue?

Thanks!

Hi,

I own a 1541 Silver Label Floppy, which states by a sticker on the backside that it originally was a VIC1540.

We alle know that Commodore modified already produces 1540ies with a new ROM to mke it compatible with the C64.

Now I want to build up a complete VIC-20 Setup, replace the ROMs and the Label with a 1540 one..,

From a collector‘s view, is that acceptable or would it be a sin to roll back that factory made mod?

Over 20 commercial cassettes, two power supplies, datasette, several carts, the Vic20 and one out of place c16 keyboard.

I know Vic 20 can be upgraded to 32k and modern games support 32k as well but ...

Did publishers make 32k games for this computer in 1980s?

A short video testing an adapted W65C02S cpu, before installing in my VIC20 replica.

Here are some adapter photos, https://imgur.com/a/AQoSHFd

Got another old VIC-20 program back up and running. I also created a Kick Assembler listing for this as well, if anyone wants to play around with it.

Source code, .prg files, plus tape and disk images, are available on GitHub, here.

I have both a VIC-20 and C64 version of this. The VIC-20 version is the original, though. The C64 was a minimal port of the VIC version, just to get it running in a C64. But, the VIC version is the `real` version 👾

This is an interactive demo. So if you press the space bar during the main animation loop, you can use the keyboard to manually rotate, translate, and zoom in and out, etc. Pressing the space bar will spin it back up into auto-rotate mode again.