Search found 18 matches

by nanochess
Thu Aug 15, 2024 10:04 pm
Forum: Games programming
Topic: Help for testing in real hardware
Replies: 4
Views: 3434

Help for testing in real hardware

Hi all. Recently I've uploaded the official CVBasic compiler v0.6.0 with support for Creativision. It works just fine in emulation, however, it hasn't been tested in real hardware so far. I would be greatly interested if someone could test some of the following games in a real Creativision. I'm look...
by nanochess
Mon Aug 12, 2024 4:55 pm
Forum: Introduce yourself!
Topic: Greetings from Mexico City!
Replies: 4
Views: 4177

Re: Greetings from Mexico City!

You're welcome!

I'm glad I could make this port. It wasn't easy but it came out really well.

Pretty happy to hear people is interested in CVBasic. I hope to see more new games!
by nanochess
Mon Aug 12, 2024 1:21 am
Forum: Software
Topic: Recover damaged CPU Diagnostic ROM
Replies: 13
Views: 12705

Re: Recover damaged CPU Diagnostic ROM

You wouldn't believe this, but I think the Creativision Emulator has a bug. It enters in a loop when doing DEX, and when X=$20 it changes to X=$FF so it never ends the loop. I revised the source code, but it looks good. You can test it yourself by running it in trace mode (the -t command line option...
by nanochess
Mon Aug 12, 2024 12:16 am
Forum: Software
Topic: Recover damaged CPU Diagnostic ROM
Replies: 13
Views: 12705

Re: Recover damaged CPU Diagnostic ROM

I just noticed my recover.c utility was prepared when I though the whole ROM as 4K, here is an updated version.

BTW, when you run it, you can notice the runs of bad bytes in the dumps.
by nanochess
Mon Aug 12, 2024 12:08 am
Forum: Software
Topic: Recover damaged CPU Diagnostic ROM
Replies: 13
Views: 12705

Re: Recover damaged CPU Diagnostic ROM

That's exactly what i did. Only bit 6 and 1 of each byte. The 4K dump was the best there as only bit 1 was damaged, but it provided only 2K of $a000-$a7ff and 2K of $b000-$b7ff. However, there were a few parts of the dumps where several bytes in row were more severely damaged (runs of 5 to 10 bytes)...
by nanochess
Sun Aug 11, 2024 9:17 pm
Forum: Software
Topic: Recover damaged CPU Diagnostic ROM
Replies: 13
Views: 12705

Re: Recover damaged CPU Diagnostic ROM

I've posted it first in Atariage, but I solved the challenge. First, I made a program to make a "good" ROM based on three of the best files provided (the best one is the 4k image file, a shame it is only half of the program). I thought I could get something working, but of course, it wasn't so easy....
by nanochess
Fri Aug 09, 2024 4:21 am
Forum: Introduce yourself!
Topic: Greetings from Mexico City!
Replies: 4
Views: 4177

Re: Greetings from Mexico City!

I used to publish a list of authored games when introducing myself, but now I only mention two or three related games.

Nice to be in this forum. Thanks for the heads up!
by nanochess
Thu Aug 08, 2024 3:32 pm
Forum: Introduce yourself!
Topic: Greetings from Mexico City!
Replies: 4
Views: 4177

Greetings from Mexico City!

Hi all! I'm Oscar Toledo G. most known as nanochess in the retrogaming world. I've coding retrogames starting in 2010, and started 6502 coding in the year 2014, when I made Space Raid for Atari 2600, and later Aardvark for Atari 2600 . I even wrote a book about the subject. At the end of February 20...