Search found 1174 matches

by CunningFellow
Tue Apr 02, 2019 9:45 pm
Forum: Programming & Software
Topic: Video mode experiments
Replies: 5
Views: 1176

Re: Video mode experiments

Welcome to the forum RV6502 Streaming LZ77 requires 256 bytes for the circular buffer + 1 byte index into that buffer. In my Bad Apple video player I use 2x separate LZ77 streams (514 bytes) as compressing the motion command stream and the video content stream separately gave much better compression...
by CunningFellow
Fri Mar 22, 2019 9:17 pm
Forum: Games & Demos
Topic: Bubble Bobble (W.I.P.)
Replies: 39
Views: 12261

Re: Bubble Bobble (W.I.P.)

I am guessing ArtcFox has examples of function pointers in his games, but I can't point you to them. I can point you to the function pointers in my games. Have a look in the source code for T2K in the file objects.c There is an array of function pointer for all the objects on screen for their differ...
by CunningFellow
Sun Mar 10, 2019 10:26 pm
Forum: Programming & Software
Topic: Game size problem with bootloader.
Replies: 8
Views: 1149

Re: Game size problem with bootloader.

2^16 - 2^12 = 61440 is the hard limit on game size I think.

Do you have any "Sections" that maybe colliding with the bootloader?
by CunningFellow
Sun Feb 17, 2019 12:28 pm
Forum: Uzebox Derivatives & open source consoles
Topic: Experimentation with Adafruit ItsyBitsy M4 board
Replies: 31
Views: 5318

Re: Experimentation with Adafruit ItsyBitsy M4 board

the DMA proccess can't be slowed down, so the pixels output will go too fast for this option at 120 MHz. Also, not sure if the DMA request will induce a small jitter from the acess request to the bus while the CPU finish the actual insruction execution? At least, this is the way ATXMEGA works for D...
by CunningFellow
Sun Feb 17, 2019 11:23 am
Forum: Uzebox Derivatives & open source consoles
Topic: Experimentation with Adafruit ItsyBitsy M4 board
Replies: 31
Views: 5318

Re: Experimentation with Adafruit ItsyBitsy M4 board

VGA (640x480) timing is 800 total clocks per line at 25Mhz. Have you considered just DMAing 800 bytes to the port in an endless loop and having the timers make the syncs. Just leave the first 112 and the last 48 bytes zero and only write to the middle 640. Or you could waste 1600 bytes and ping-pong...
by CunningFellow
Thu Jan 31, 2019 9:30 pm
Forum: Hardware
Topic: Uzebox Portable Kit Poll
Replies: 21
Views: 3047

Re: Uzebox Portable Kit Poll

I put in a yes, but please don't take that as a firm order. It will depend on cash levels when the time comes.
by CunningFellow
Wed Jan 30, 2019 9:06 pm
Forum: Hardware
Topic: The quest to a portable Uzebox - update!
Replies: 201
Views: 41982

Re: The quest to a portable Uzebox - update!

I have never pad printed onto a 3D print or know if it works well. From experience with silk screening and pad printing I will say pad printing is more likely to work well. PLA plastic could be a problem and you may have to print in ABS or PETG which both obviously work well with pad printing. I got...
by CunningFellow
Wed Jan 30, 2019 4:36 am
Forum: Hardware
Topic: The quest to a portable Uzebox - update!
Replies: 201
Views: 41982

Re: The quest to a portable Uzebox - update!

uze6666 wrote:
Wed Jan 30, 2019 2:54 am
For the enclosure I will make two versions available. One with the embossed text and one without. I stlll need to try silkscreening for the text, would look so much better.
You probably want pad printing / tampo printing.
by CunningFellow
Sun Jan 27, 2019 11:37 am
Forum: Programming & Software
Topic: Video mode experiments
Replies: 5
Views: 1176

Re: Video mode experiments

Could be interesting indeed to collect some of these ideas! RLE mode that is 5 clock per pixel and has a demo already. Isn't the video mode itself mostly complete at this point, by the way? I see you are pushing towards vector graphics and 3D, the demos look pretty solid, but I could imagine those ...
by CunningFellow
Sat Jan 26, 2019 11:43 pm
Forum: Programming & Software
Topic: Video mode experiments
Replies: 5
Views: 1176

Video mode experiments

Probably mostly a question aimed at Jubatian, but anyone else working on something or with ideas can chime in. I am wondering what video mode ideas are being worked on or thought about by people. From me there is the RLE mode that is 5 clock per pixel and has a demo already. 4 Bpp 9 clock per pixel ...