Search found 319 matches

by @username@
Tue Dec 03, 2013 11:43 pm
Forum: Homebrew software and hardware (excluding games)
Topic: FPGA Creativision / Tech Docs
Replies: 20
Views: 20399

Re: FPGA Creativision / Tech Docs

Another oddity I noticed. I believe the BIOS I have is hacked, because it does not show the logo, and only flashes the year real fast before the game starts. Once a game is loaded, it will not "cold reboot" unless you clear some bytes in RAM. This appear to be normal- it's for a cold/warm restart (...
by @username@
Tue Dec 03, 2013 4:13 pm
Forum: Homebrew software and hardware (excluding games)
Topic: Progress
Replies: 17
Views: 16661

Re: Progress

Another little update, just to let you know we're not sleeping :)

The porting of the low-level Colecovision library is almost complete, so I thought I'd share the starfield demo with you.

Expect the code and library real soon!
by @username@
Mon Dec 02, 2013 10:43 am
Forum: Homebrew software and hardware (excluding games)
Topic: Progress
Replies: 17
Views: 16661

Re: Progress

Added joystate function. This mimics the BASIC JOY function. #include <stdio.h> #include <stdlib.h> #include <string.h> #include <conio.h> #include <creativision.h> static const char Text[] = "Joysticks"; int main( void ) { unsigned char XSize, YSize; unsigned char c; clrscr(); screensize(&XSize, &Y...
by @username@
Sun Dec 01, 2013 10:45 pm
Forum: Homebrew software and hardware (excluding games)
Topic: Progress
Replies: 17
Views: 16661

Re: Progress

@username@: are you adding CreatiVision libraries to the compiler? Does this mean that there's specific functions to drive the VDP, PIA and SPU in the C compiler? For the moment, we have very simplistic functions. One of the things that makes the CV easy to program is that it's memory mapped. Also,...
by @username@
Sun Dec 01, 2013 4:02 pm
Forum: Homebrew software and hardware (excluding games)
Topic: Progress
Replies: 17
Views: 16661

Re: Progress

Introducing CC65 for the Creativision - *OFFICIAL* Thanks to the hard work of Oliver Schmidt , current maintainer of CC65, we have a working C development environment. This is not to say that it's complete - there's a way to go, but there is enough to get you going! How to setup on Windows 1) Downl...
by @username@
Sun Dec 01, 2013 1:12 am
Forum: Homebrew software and hardware (excluding games)
Topic: FPGA Creativision / Tech Docs
Replies: 20
Views: 20399

Re: FPGA Creativision / Tech Docs

This is the evidence that shows the sound chip is clocked at 2Mhz.

I have compared to the actual frequencies, against the table held in BIOS (<FC80/>FCAA) and BASIC.

The chip can go higher and lower, but perhaps this was considered the 'safe zone'.
by @username@
Mon Nov 25, 2013 10:37 am
Forum: Homebrew software and hardware (excluding games)
Topic: Progress
Replies: 17
Views: 16661

Progress

Hi,

Just thought I'd share our progress so far.

Here's a hello world, from C.
by @username@
Sun Nov 17, 2013 11:20 am
Forum: Software
Topic: Emulation questions
Replies: 136
Views: 114153

Re: Emulation quesions

I would like to contribute in some way, but I'm still too busy studying English these days, and loads of things to do. I'm planning to take your source code by the end of November, and make a few additions to it. I wish I have the time btw. Contributions are very welcome. If there's an error with e...
by @username@
Fri Nov 15, 2013 3:19 pm
Forum: Homebrew software and hardware (excluding games)
Topic: BASIC disassembly
Replies: 10
Views: 14747

Re: BASIC disassembly

Here's something from Wizzdom issue 3, page 4, which intrigued me. The description of the self modifying program is a little confusing Start of program area is 220,0 followed by 5 characters for line number then a space, then 4 characters for DATA: therefore the 0 is at the tenth position. The actua...
by @username@
Fri Nov 15, 2013 2:20 pm
Forum: Software
Topic: Emulation questions
Replies: 136
Views: 114153

Re: Emulation quesions

Ok, how about we call a truce. I agree not to interfere with how you run here, you agree not to interfere in what I do? Sound fair? The only things I ask you is to apply the same rules to everyone, regardless of how long they have been here. Sound fair too? Also, I hope you can smile and maybe laugh...