| 6502.org http://forum.6502.org/ |
|
| TinyTapeout http://forum.6502.org/viewtopic.php?f=10&t=8090 |
Page 1 of 1 |
| Author: | John West [ Sat Jun 01, 2024 8:32 pm ] |
| Post subject: | TinyTapeout |
This is not directly 6502 related, and not really programmable logic. But it might interest a few people here, and this feels the right place for it. TintTapeout https://tinytapeout.com/ is a relatively new service that drastically reduces the cost of producing ASICs. They coordinate your design sharing a chip with a bunch of others, spreading the cost. So instead of the tens of thousands it usually costs, you can get your own silicon for $300. Don't expect to be able to build a drop-in 6502 replacement with it: you only get 24 I/O pins (8 input, 8 output, 8 bidirectional, all 3.3V), and the area you have to work with is very small. Sharing a chip with a few hundred other people has a down-side. Still, people have done some fairly impressive things with it. The latest run has a Wolf3D-like renderer, a few simple CPUs, and a re-implementation of the AY-3-8913 sound chip. I haven't done anything with it yet - my plans are too ambitious and will take a lot of preparation. |
|
| Author: | gilhad [ Sun Jun 02, 2024 1:13 am ] |
| Post subject: | Re: TinyTapeout |
I looked there, but I could not found this: Suppose, that I will make design (with 24 I/O pins etc, etc) and submit it there, then - I will have to pay $300 and I will get (maybe year later) one black chip soldered on green PCB? - what if I want just the chip, no PCB? - what if I would like 2 (or 10) same chips, have I pay 2x (or 10x) the $300 and (maybe) submit my desing 2x (or 10x)? |
|
| Author: | plasmo [ Sun Jun 02, 2024 3:12 am ] |
| Post subject: | Re: TinyTapeout |
Must be a way around the IO and voltage limitations because the new replacement Z80 is on Tiny tapeout7, and Z80 is 5V and 40 pins. https://github.com/rejunity/z80-open-silicon Bill |
|
| Author: | BigEd [ Sun Jun 02, 2024 5:33 am ] |
| Post subject: | Re: TinyTapeout |
For Z80 pin count, see the slide deck as linked in the README: three sets of 8 pins are multiplexed down to 8 I/Os. Also addresses price: Three price levels: 100 QFN parts for $10k, 300 WSCP parts for $10k, or 1000 parts for $20k Core voltage is 1.8v - perhaps the I/Os are 5V tolerant, but sounds like external regulation and level shifting might be needed. A carrier board and demultiplexor will be needed for a 40 DIP replacement, but it's a fine idea for a project. |
|
| Author: | GlennSmith [ Sun Jun 02, 2024 5:28 pm ] |
| Post subject: | Re: TinyTapeout |
Quote: The latest run has a Wolf3D-like renderer, a few simple CPUs, and a re-implementation of the AY-3-8913 sound chip. I'd love to get my hands on a simple sound chip like that... |
|
| Author: | enso1 [ Thu Aug 01, 2024 2:21 pm ] |
| Post subject: | Re: TinyTapeout |
Wasn't there a low pin-count version of the 6502? |
|
| Author: | drogon [ Thu Aug 01, 2024 3:39 pm ] |
| Post subject: | Re: TinyTapeout |
enso1 wrote: Wasn't there a low pin-count version of the 6502? There are a few 28 pin variants. The most popular being the 6507 - as used on about 30 million Atari 2600 video game consoles... I built a little SBC out of one recently - Picture here, but I've yet to do a proper write-up on it: https://unicorn.drogon.net/IMG_20231220_193620_DRO.jpg -Gordon |
|
| Page 1 of 1 | All times are UTC |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|
