Search found 338 matches

by vicist
Thu Apr 01, 2021 10:52 am
Forum: Games
Topic: Vicships - New Puzzle Game
Replies: 6
Views: 2785

Vicships - New Puzzle Game

A puzzle game.
Requires 8k+ memory.
2021-04-01 (2).png
Info included in download.

Vicships.zip
(9.8 KiB) Downloaded 115 times
by vicist
Thu Mar 04, 2021 3:12 am
Forum: Emulation and Cross Development
Topic: Vic 20 Basicode
Replies: 26
Views: 1958

Re: Vic 20 Basicode

Looks like each machine had its own load/save routines.
This item is on ebay at the moment.

ebay listing

s-l1601.jpg
s-l1600.jpg
by vicist
Sun Feb 28, 2021 5:09 pm
Forum: Programming
Topic: Tips for Reverse Engineering a Cassette Program
Replies: 41
Views: 2319

Re: Tips for Reverse Engineering a Cassette Program

No, no magic...

...and yet it works.
by vicist
Sun Feb 28, 2021 8:45 am
Forum: Programming
Topic: Tips for Reverse Engineering a Cassette Program
Replies: 41
Views: 2319

Re: Tips for Reverse Engineering a Cassette Program

Tap-Clean reports errors after cleaning but it still works.

Using load will produce a 'LOAD ERROR'.
Using 'shift RUN/STOP' works.

Don't ask me why. :roll:
by vicist
Sun Feb 28, 2021 4:23 am
Forum: Programming
Topic: Tips for Reverse Engineering a Cassette Program
Replies: 41
Views: 2319

Re: Tips for Reverse Engineering a Cassette Program

Sure....
cleaned_BOSS-8k.zip
(421.78 KiB) Downloaded 49 times
by vicist
Sat Feb 27, 2021 4:18 am
Forum: Programming
Topic: Tips for Reverse Engineering a Cassette Program
Replies: 41
Views: 2319

Re: Tips for Reverse Engineering a Cassette Program

I had the same problem.
Used Tap-Clean on the file and that did the trick.
Now loads OK at warp in vice. :)
by vicist
Thu Jan 28, 2021 4:56 am
Forum: General Topics
Topic: Jeff's VIC 20 Book
Replies: 268
Views: 29045

Re: Jeff's VIC 20 Book

Page 8 - needs an 8

Screen horizontal origin:
POKE 36864, PEEK(36B64) AND 128 OR X

Brilliant reference material. :D
by vicist
Tue Jan 26, 2021 5:32 pm
Forum: Games
Topic: Unpublished Italian game: SATURN CAVES arcade adventure
Replies: 34
Views: 2203

Re: Unpublished Italian game: SATURN CAVES arcade adventure

AFAICT the data looks correct - the listing is hard to read.
I have changed some of the graphics. Does this look better?

sc.png

Give it a try and see if anything looks messed up.

saturn caves(b).zip
(6.95 KiB) Downloaded 72 times
by vicist
Sun Jan 24, 2021 10:57 am
Forum: Games
Topic: Unpublished Italian game: SATURN CAVES arcade adventure
Replies: 34
Views: 2203

Re: Unpublished Italian game: SATURN CAVES arcade adventure

A one-file version below... :)

saturn caves.zip
(6.7 KiB) Downloaded 78 times

...but you will miss out on the loading graphics. :cry:
by vicist
Mon Jan 18, 2021 9:18 am
Forum: Programming
Topic: Custom char issue in 6502
Replies: 20
Views: 1497

Re: Custom char issue in 6502

Hi Daroou, welcome to the forum. $FFD2 prints characters to the screen so 'a' would be 65 not 1. Adding 128 would only shift the character. The ROM characters are accessed by inverse printing them. Printing chr$(18) before the characters would do the trick. E.G. msg !byte $12, $41, $42, $43, $00
by vicist
Sun Dec 20, 2020 5:44 pm
Forum: Games
Topic: Compute Gazette Type in Games
Replies: 13
Views: 932

Re: Compute Gazette Type in Games

Some of these games may be available from VIC-20 Listings . I did find that resource but did not see anything from Compute Gazette specifically on it. That's why i figured i would do this. There are several game books from Compute! on the site. Skydiver is in Compute!'s First Book of VIC Games. Nev...
by vicist
Sun Dec 20, 2020 10:55 am
Forum: Games
Topic: Compute Gazette Type in Games
Replies: 13
Views: 932

Re: Compute Gazette Type in Games

Some of these games may be available from VIC-20 Listings.
by vicist
Sat Oct 17, 2020 5:20 am
Forum: Hardware and Tech
Topic: Need Help with VIC Hardware Diagrams
Replies: 19
Views: 1228

Re: Need Help with VIC Hardware Diagrams

I prefer $0000 at the top and $ffff at the bottom.
Like how the screen and colour memory is laid out, lowest value - top left, highest value - bottom right.

Still, neither format is wrong, just personal preference.

Love & Peace :)
by vicist
Thu Oct 08, 2020 5:21 am
Forum: Programming
Topic: message "division by zero error"
Replies: 21
Views: 1261

Re: message "division by zero error"

If you select 1 at the 'how many spirals' prompt, you may enter your own parameters into the following prompts. If you select 2-4 at the first prompt, you have to keep pressing return at every other prompt until the second prompt (spriral figure #) equals the number you chose at the first prompt, th...
by vicist
Wed Sep 16, 2020 3:20 pm
Forum: Other Systems
Topic: BBC Micro
Replies: 23
Views: 2069

Re: BBC Micro

This is also possible in VICE.
You could write an entire program in notepad if you wish, copy the whole thing and paste it into a running emulator. The entire program is rendered on screen and you just have to press return to enter the last line. Type run and watch it go. Simple.