Search found 81 matches

by mast3rbug
Sat Feb 16, 2019 8:08 pm
Forum: Uzebox Derivatives & open source consoles
Topic: Experimentation with Adafruit ItsyBitsy M4 board
Replies: 31
Views: 16812

Re: Experimentation with Adafruit ItsyBitsy M4 board

The Wait States you need to configure for the NVM controller are on Page 2042. If you use the Microchip library, it likely does it for you. But why you may still see it running blazing fast like if it ran without any fishy stuff is that this MCU has some apparently quite awesome Instruction & Data ...
by mast3rbug
Sat Feb 16, 2019 2:23 am
Forum: Uzebox Derivatives & open source consoles
Topic: Experimentation with Adafruit ItsyBitsy M4 board
Replies: 31
Views: 16812

Re: Experimentation with Adafruit ItsyBitsy M4 board

Also, I want to design from start the RGB generator the same as the UZEBOX, I see the Uzebox is byte reversed

RRRGGGBB

(PORTC)
PPPPPPPP
CCCCCCC
01234567
Is someone that can confirm to me the byte order of this? I mean:

012 = 0 MSB RED and 2 LSB RED and so on?...

Thanks
Cedric
by mast3rbug
Sat Feb 16, 2019 1:58 am
Forum: Uzebox Derivatives & open source consoles
Topic: Experimentation with Adafruit ItsyBitsy M4 board
Replies: 31
Views: 16812

Re: Experimentation with Adafruit ItsyBitsy M4 board

I feel like the jitter could likely come from that the interrupt simply can not be jitter-free, you would have to compensate for it by reading the timer (like the Uzebox kernel does). Yes for sure! don't worry about this, I built about 6 devices that generate video signal, I had to manage all kind ...
by mast3rbug
Fri Feb 15, 2019 3:03 am
Forum: Uzebox Derivatives & open source consoles
Topic: Experimentation with Adafruit ItsyBitsy M4 board
Replies: 31
Views: 16812

Re: Experimentation with Adafruit ItsyBitsy M4 board

Okay, After a lot of work (I found these AMR chip are really complicated compared to Atmega...) and a lot of documentation reading (The SamD51 data sheet is about 2500 pages). I managed to have a stable image at 120 Mhz, for now only 1 pixel jitter. (Better than 6 pixels, and I'm comfortable with th...
by mast3rbug
Wed Feb 13, 2019 1:05 am
Forum: Uzebox Derivatives & open source consoles
Topic: Experimentation with Adafruit ItsyBitsy M4 board
Replies: 31
Views: 16812

Re: Experimentation with Adafruit ItsyBitsy M4 board

I'm working now on the picture stability, I'm trying to use counter instead of interrupt to manage the Hsync. Also, in this particular chip, it looks like it is able to copy Data from RAM to IO with DMA with 0 CPU intervention at full 120 MHZ speed. I don't know if some jitter will occure interferin...
by mast3rbug
Mon Feb 11, 2019 4:03 am
Forum: Uzebox Derivatives & open source consoles
Topic: Experimentation with Adafruit ItsyBitsy M4 board
Replies: 31
Views: 16812

Experimentation with Adafruit ItsyBitsy M4 board

Hi all. Long time I did't log into this forum, but I'm still active in the MicroControllers scene. Here a quick post about a new experiment I have done; Recently, I purchased this board because I wanted to experiment with ARM CPU since long time. Also, it's really low cost and it have an ARM Cortex ...
by mast3rbug
Fri Apr 12, 2013 2:09 am
Forum: Uzebox Derivatives & open source consoles
Topic: Atxmega NEW powerkill CONSOLE
Replies: 53
Views: 23807

Re: Atxmega NEW powerkill CONSOLE

I keep checking back for progress. I love reading about these retro systems, and long for a time when I will have time to play with these projects. I would definitely be interested in a kit, I would love a board that could do snes/amiga quality graphics and audio in a sbc. The project is still aliv...
by mast3rbug
Tue Jan 22, 2013 2:16 pm
Forum: Uzebox Derivatives & open source consoles
Topic: Atxmega NEW powerkill CONSOLE
Replies: 53
Views: 23807

Re: Atxmega NEW powerkill CONSOLE

Hi. Just a small update. Here the scrolltest of the Turrican II Tile set. (The music is not from the console, but will be in the final release). I don't think that I will do the complete Turrican clone, the MAP is way too big. I have found the complet MAP/Tile set on internet. The final scroll will ...
by mast3rbug
Sat Jan 19, 2013 9:32 pm
Forum: Uzebox Derivatives & open source consoles
Topic: Uzebox & SRAM
Replies: 31
Views: 10704

Re: Uzebox & SRAM

Hi Brad.

Any new development on your console?

from my side, I finished the video drivers, I'm now writing my first game. Turrican II with original music. I have found all the sprites on internet. Really cool.

Mast3rbug
by mast3rbug
Sat Jan 12, 2013 2:47 am
Forum: Uzebox Derivatives & open source consoles
Topic: Uzebox & SRAM
Replies: 31
Views: 10704

Re: Uzebox & SRAM

Talking Amiga - do you plan to support MOD/Tracker on this side of things? I wrote a converter (PC Windows) that takes bitmaps and Wave files, then saves them as paste ready GCC files, but I have not considered any MOD stuff. MasterBug has done some work there and by looking at his demos, he seems ...