Search found 1071 matches

by groepaz
Mon Mar 04, 2024 6:58 pm
Forum: Games
Topic: ELITE
Replies: 5
Views: 1071

Re: ELITE

The bitmap shouldnt be a problem - you can do that with a charset matrix.

With fully expanded VIC20, porting Elite sounds quite doable to me - still a lot of work, obviously :)
by groepaz
Mon Feb 12, 2024 12:10 pm
Forum: Collecting and History
Topic: How to convert Tap files to D64?
Replies: 11
Views: 909

Re: How to convert Tap files to D64?

Use TapEX -> https://csdb.dk/release/?id=237663

load the tap, select "extract prg" from the menu, and it creates a directory with all files. For vic20 tapes you will probably have a pretty good success rate :)
by groepaz
Sun Feb 11, 2024 10:42 am
Forum: Emulation and Cross Development
Topic: Corrupt end of basic program
Replies: 7
Views: 854

Re: Corrupt end of basic program

It is very unlikely that you found a bug in VICE here.
Yes. However, if there is a reliable way to reproduce this, i'd still like to know :)
by groepaz
Wed Feb 07, 2024 4:37 pm
Forum: Programming
Topic: Resetting IRQs
Replies: 10
Views: 921

Re: Resetting IRQs

I'd just ask Krill to port his loader... 8)
by groepaz
Tue Feb 06, 2024 4:44 pm
Forum: Other Systems
Topic: Extremely Rare Ala Software game for C64 - Whiz Kid
Replies: 12
Views: 1334

Re: Extremely Rare Ala Software game for C64 - Whiz Kid

I mean (hires) scans, using a scanner, not a camera.
by groepaz
Tue Feb 06, 2024 3:06 pm
Forum: Other Systems
Topic: Extremely Rare Ala Software game for C64 - Whiz Kid
Replies: 12
Views: 1334

Re: Extremely Rare Ala Software game for C64 - Whiz Kid

Can you do actual scans? The Tape Archive aims for highest quality - i don't think they will accept photos like this
by groepaz
Tue Feb 06, 2024 11:19 am
Forum: Other Systems
Topic: Extremely Rare Ala Software game for C64 - Whiz Kid
Replies: 12
Views: 1334

Re: Extremely Rare Ala Software game for C64 - Whiz Kid

OK apparently the original says you should start it with SYS16384 - and that works https://retrocollector.org/photos/full/26259.jpg Attached is a working .tap :) It would be great if you could make hires scans of the tape cover, box, and the cassette itself - then it can be included in the tape arch...
by groepaz
Tue Feb 06, 2024 11:09 am
Forum: Other Systems
Topic: Extremely Rare Ala Software game for C64 - Whiz Kid
Replies: 12
Views: 1334

Re: Extremely Rare Ala Software game for C64 - Whiz Kid

OK cool.... first, i can confirm this is this game: https://csdb.dk/release/?id=182936

There is some weird problem with the .tap i produced, the autostart does not work for some reason.... (but the data can be extracted and the game started by jumping to the right address)

Will play around a bit :)
by groepaz
Tue Feb 06, 2024 8:58 am
Forum: Programming
Topic: Resetting IRQs
Replies: 10
Views: 921

Re: Resetting IRQs

use "chis" in the monitor. its enabled by default in any half recent build
by groepaz
Mon Feb 05, 2024 4:30 pm
Forum: Other Systems
Topic: Extremely Rare Ala Software game for C64 - Whiz Kid
Replies: 12
Views: 1334

Re: Extremely Rare Ala Software game for C64 - Whiz Kid

did anybody have a chance to try out the file and see if it runs?
I get load error in VICE - that may be related to how the wav->tap conversion was done
by groepaz
Mon Feb 05, 2024 3:39 pm
Forum: Emulation and Cross Development
Topic: VICE White Noise Bug?
Replies: 12
Views: 970

Re: VICE White Noise Bug?

you should clock it for at least 16 cycles first, yes :)
by groepaz
Mon Feb 05, 2024 3:30 pm
Forum: Emulation and Cross Development
Topic: VICE White Noise Bug?
Replies: 12
Views: 970

Re: VICE White Noise Bug?

you shouldnt have to wait, it takes 16 machine cycles to fill the lfsr with 1 bits: enabled:0 bit3:0 bit12:0 bit14:0 bit15:0 gate1:0 gate2:0 gate3:1 gate4:1 lfsr:0001 enabled:0 bit3:0 bit12:0 bit14:0 bit15:0 gate1:0 gate2:0 gate3:1 gate4:1 lfsr:0003 enabled:0 bit3:0 bit12:0 bit14:0 bit15:0 gate1:0 g...
by groepaz
Mon Feb 05, 2024 3:23 pm
Forum: Emulation and Cross Development
Topic: VICE White Noise Bug?
Replies: 12
Views: 970

Re: VICE White Noise Bug?

Sorry, i interpreted wrong what you wrote...

yes it requires "enabled" being zero (for some cycles) to start. which it is after reset.
by groepaz
Mon Feb 05, 2024 3:16 pm
Forum: Emulation and Cross Development
Topic: VICE White Noise Bug?
Replies: 12
Views: 970

Re: VICE White Noise Bug?

1 AND 1 is 1, not 0
by groepaz
Mon Feb 05, 2024 3:10 pm
Forum: Emulation and Cross Development
Topic: VICE White Noise Bug?
Replies: 12
Views: 970

Re: VICE White Noise Bug?

bit 0 of gate4 is either 0 or 1 on each iteration, and ORed into the LFSR ... so thats how 1 bits go into the LFSR