Search found 19 matches

by bmwtcu
17 Sep 2020, 10:44
Forum: Kit assembly gallery
Topic: My Gigatron build
Replies: 9
Views: 409

Re: My Gigatron build

... I found a 10-pin R2R 10K network on eBay which I believe will work by cutting off the extra 4 pins (7-10). I suspect that won't work since the last 2 pins are wired differently from the rest of the SIP. I also built one a while back out of discrete SMT resistors because I couldn't think of a be...
by bmwtcu
15 Sep 2020, 21:07
Forum: Kit assembly gallery
Topic: My Gigatron build
Replies: 9
Views: 409

Re: My Gigatron build

I gotta say, that black PCB looks really sharp!
by bmwtcu
03 Aug 2020, 11:02
Forum: Hardware and software hacking
Topic: Invader
Replies: 17
Views: 2187

Re: Invader

Thanks much to both of you for the information. Makes sense now.
by bmwtcu
03 Aug 2020, 07:44
Forum: Hardware and software hacking
Topic: Invader
Replies: 17
Views: 2187

Re: Invader

Amazing how much you squeezed out of the Gigatron! I spent more time than I care to admit playing this today. I did notice an anomaly playing with keyboard that I'm trying to make sense of. If you fire using the enter key, the player shifts a little to the right with each shot, which doesn't happen ...
by bmwtcu
20 Jul 2020, 16:43
Forum: Escape Meta Alt Control Shift
Topic: Gigatron ASIC?!?
Replies: 12
Views: 1428

Re: Gigatron ASIC?!?

largenumabbrev.gif
largenumabbrev.gif (17.63 KiB) Viewed 371 times
Hmm, let's see, what's smaller than Giga- (that isn't going to get me sued)? Kilotron?!? :lol:
Megatron.jpg
Megatron.jpg (18.86 KiB) Viewed 371 times
If I can figure out how to, I'll start a poll, but keep the suggestions coming!
by bmwtcu
20 Jul 2020, 14:32
Forum: Escape Meta Alt Control Shift
Topic: Gigatron ASIC?!?
Replies: 12
Views: 1428

Re: Gigatron ASIC?!?

Hi Walter, for me personally, it's a learning exercise. I have never done this before, so don't hold your breath if you're waiting for an ASIC kit :lol: . Given it's relative simplicity, I feel the Gigatron design affords me a good chance of actually getting something done in the short timeframe giv...
by bmwtcu
19 Jul 2020, 20:13
Forum: Escape Meta Alt Control Shift
Topic: Gigatron ASIC?!?
Replies: 12
Views: 1428

Re: Gigatron ASIC?!?

Hi, Is there documentation on what end-user capability is available on the RISC-V supervisor? Firstly, I'm interested in whether there is:- 1) JTAG debug interface that can map/modify end-user 64kx16 NVM. The supervisor will load it's program from an external SPI flash. There will be some default p...
by bmwtcu
19 Jul 2020, 16:59
Forum: Escape Meta Alt Control Shift
Topic: Gigatron ASIC?!?
Replies: 12
Views: 1428

Re: Gigatron ASIC?!?

Have you thought about SRAM and FLASH arbitration? i.e. How do the RISC-V and Gigatron arbitrate over the memory resources? Good question... It's not entirely clear to me if the RISC-V has on-die memory as well or will require an external NVM/RAM so I have some reading to do. Regardless, I was assu...
by bmwtcu
19 Jul 2020, 13:36
Forum: Escape Meta Alt Control Shift
Topic: Gigatron ASIC?!?
Replies: 12
Views: 1428

Re: Gigatron ASIC?!?

So each of the chips comes with a RISC-V on board which is part of the standard harness that efabless would design, so I'm more confident in your ability to port Babelfish over to the RISC-V and do away with the Arduino all together than I am in my ability to slap on an AVR core from Opencores and h...
by bmwtcu
18 Jul 2020, 20:53
Forum: Escape Meta Alt Control Shift
Topic: Gigatron ASIC?!?
Replies: 12
Views: 1428

Gigatron ASIC?!?

https://www.youtube.com/watch?v=EczW2IWdnOM https://docs.google.com/presentation/d/e/2PACX-1vRtwZPc8ykkkgtUkHkoJZrP9jKOo3FYdKqbg-So0ic6_kx7ha1vHnxrWmuxWkTc9GfC8xl0TfEpMLwK/pub https://groups.google.com/g/skywater-pdk-announce/c/4zBSayPQy4I https://fossi-foundation.org/2020/06/17/fossi-dial-up https:...