Search found 46 matches

by rv6502
Sun Nov 03, 2019 3:40 am
Forum: Off Topic
Topic: A bit of time off, but awesome stuff going on here
Replies: 6
Views: 605

Re: A bit of time off, but awesome stuff going on here

Aw man, I know the feeling.

And It looks like things are ramping up at work so progress might slow down on the hobby side for a while.
by rv6502
Sun Nov 03, 2019 1:31 am
Forum: Programming & Software
Topic: Unlimited RAM/ROM
Replies: 10
Views: 1765

Re: Unlimited RAM/ROM

Could you give me some pointers on where should I start if I wanted to make a Clang/LLVM backend? How complicated is that? I forgot to take notes :P I started with cloning the ARC target, renaming it, built to make sure it existed in the executable that I could do --target MyTargetName and that bui...
by rv6502
Sun Nov 03, 2019 12:26 am
Forum: Programming & Software
Topic: Unlimited RAM/ROM
Replies: 10
Views: 1765

Re: Unlimited RAM/ROM

I don't think it's possible to use SPI in the video kernel if that VM is running as it needs to read its "ROM" from the SD card. Multiplexing the bus isn't reliable since there's no telling how long the SD card will delay and as far as I know the SD card's /CS line needs to stay asserted until the t...
by rv6502
Fri Nov 01, 2019 7:29 am
Forum: Hardware
Topic: SNES case (WIP) and dual-LED
Replies: 3
Views: 1019

Re: SNES case (WIP) and dual-LED

I used microswitches similar to these with a longer shaft: 51sjcAwurrL._SL1100_.jpg They click when you hit the shaft sideways. It's not really how they're meant to be used but it works. The case prevents pushing too hard on them. I need to tweak a lot of things on that snes case. I had to grind & m...
by rv6502
Fri Nov 01, 2019 7:03 am
Forum: Programming & Software
Topic: Unlimited RAM/ROM
Replies: 10
Views: 1765

Re: Unlimited RAM/ROM

It's Dhrystone's dry.c running on a custom virtual 32bits CPU on a Uzebox. It uses a binary on the SD card as ROM, the SPI RAM as main RAM, and can use a swap file on the SD card as extra RAM. The AVR SRAM/IO space is direct-mapped as well. I just finished rewriting the CPU interpreter in AVR assemb...
by rv6502
Wed Oct 30, 2019 3:13 pm
Forum: Hardware
Topic: Keyboard adapter v2?
Replies: 1
Views: 434

Keyboard adapter v2?

What if we added a resistor to the gamepad port / PS2 adapter and allowed pass-through by default? Mouse Passthrough.png We could use both gamepads AND mouse + keyboard (each one port) at the same time. With a bit of "magic" we can autodetect if it's a keyboard or mouse. (I don't remember off the to...
by rv6502
Mon Oct 28, 2019 10:10 am
Forum: Hardware
Topic: SNES case (WIP) and dual-LED
Replies: 3
Views: 1019

Re: SNES case (WIP) and dual-LED

More photos (silly limit)
sIMG_2387.JPG
sIMG_2387.JPG (247.01 KiB) Viewed 1018 times
sIMG_2388.JPG
sIMG_2388.JPG (252.37 KiB) Viewed 1018 times
PLA still bends too much at the corners.
Good time to give PETG a try.
by rv6502
Mon Oct 28, 2019 10:02 am
Forum: Hardware
Topic: SNES case (WIP) and dual-LED
Replies: 3
Views: 1019

SNES case (WIP) and dual-LED

It's still a WIP. I got the dimensions close enough to assemble it with a bit of hand grinding: sIMG_2390.JPG The PCB is upside down. I flipped and rewired the P2 controller to become P1. sIMG_2389.JPG Trying to get the connectors off with the reflow gun didn't go so well. Had to switch back to the ...
by rv6502
Sun Oct 27, 2019 10:56 pm
Forum: Hardware
Topic: Board revision requests
Replies: 11
Views: 2710

Re: Board revision requests

Label the underside for the EXT connector. Reasons? As I was modeling a custom case I realised the back IOs would be better lower so I flipped the entire board upside down. That kind of solved my problem with the whole not having labels at the bottom. AND it also gives me a bit more room to make a ...
by rv6502
Sat Oct 26, 2019 8:30 pm
Forum: Hardware
Topic: Board revision requests
Replies: 11
Views: 2710

Re: Board revision requests

If the two 3x2 ICSP headers were a bit closer together (making a 3x4 grid) we could have the option to install the connector to the underside by using the centre 3x2 without having to use a mirrored cable. sIMG_2378.JPG + + + top ICSP + + + top ICSP o o o o o o o o o + + + bottom ICSP + + + bottom o...