Search found 17 matches
- Sat May 26, 2018 6:43 pm
- Forum: Hardware
- Topic: Little Project: GAL/SPLD programmer
- Replies: 9
- Views: 4893
Re: Little Project: GAL/SPLD programmer
If you don't want to go the diy route, the tl866cs seems to be the most cost-effective solution?
- Fri May 25, 2018 7:36 pm
- Forum: Hardware
- Topic: Little Project: GAL/SPLD programmer
- Replies: 9
- Views: 4893
Re: Little Project: GAL/SPLD programmer
Uh...maybe there is some misunderstanding. I do not want replace a GAL by an Arduino. I just want to program the logic chip with the Arduino. Transfer the data via USB from PC go Arduino and then let the Arduino program the logic IC.
- Thu May 24, 2018 2:14 am
- Forum: Hardware
- Topic: Little Project: GAL/SPLD programmer
- Replies: 9
- Views: 4893
Re: Little Project: GAL/SPLD programmer
Interesting argument. I'm working on a eprom writer (struggling with too many distractions, though), and I've never thought about this problem. A 16 MHz 328 Arduino seems to be faster than a parallel connection, I thought? And if it was too slow, just use a stm32?
- Wed May 23, 2018 7:35 pm
- Forum: Hardware
- Topic: Little Project: GAL/SPLD programmer
- Replies: 9
- Views: 4893
Re: Little Project: GAL/SPLD programmer
I do understand, that you want to minimize the number of complex IC's, but I also think that an Arduino plus step-up leads to an overall simpler design?
- Mon May 14, 2018 4:50 am
- Forum: Hardware
- Topic: 28C64 in 2364 socket (28 pin to 26 pin)
- Replies: 10
- Views: 5686
Re: 28C64 in 2364 socket (28 pin to 26 pin)
Could you sand the black plastic spacers a bit shorter and then cut the pins by 1 or 2 millimeter? With a dremel and diamond disc maybe?
- Sat Feb 03, 2018 3:07 am
- Forum: Hardware
- Topic: Improving Timex/Sinclair Tape Loading
- Replies: 164
- Views: 91864
Re: Improving Timex/Sinclair Tape Loading
http://www.stm32duino.com/viewtopic.php?t=107 The hantek 6022be /bl scopes are also an option. I think one of those salae clones + sigrok might also be better than your probe: https://m.ebay.com/itm/24MHz-8CH-USB-Logic-Analyzer-24MHz-8-Channel-Compatible-to-Saleae-ARM-FPGA-M100/272337085235?hash=ite...
- Sat Oct 21, 2017 5:23 am
- Forum: Hardware
- Topic: What is the going price to have EPROMs burnt?
- Replies: 42
- Views: 19843
Re: What is the going price to have EPROMs burnt?
Just just want a cheap way to burn a 25 V eprom? I have a schematic for a Arduino based solution, although it still needs some testing.
http://www.ltspiceusers.ch/showthread.php?t=261
http://www.ltspiceusers.ch/showthread.php?t=261
- Wed Sep 27, 2017 4:51 am
- Forum: Development
- Topic: Explain this behavior
- Replies: 14
- Views: 7301
Re: Explain this behavior
Very cool! I like C and the zx81in general, so I appreciate your efforts.
First optimization, that caught my eye was this *(screen+i)= ...
Why not *screen++ = ... ?
First optimization, that caught my eye was this *(screen+i)= ...
Why not *screen++ = ... ?
- Tue Sep 19, 2017 12:04 am
- Forum: Hardware
- Topic: Create ULA for €5?
- Replies: 84
- Views: 33941
Re: Create ULA for €5?
Was this board already posted? http://gnarlygrey.atspace.cc/development-platform.html#upduino It's a nice small form factor board with 5k LE and even quite some ram. It's not 5$ , but 8$ is not _that_ much more. No clue, if the IO pins are where they are needed, but an adapter socket might fix this ...
- Fri May 12, 2017 11:43 pm
- Forum: Hardware
- Topic: Create ULA for €5?
- Replies: 84
- Views: 33941
Re: Create ULA for €5?
So who is good at eagle or KiCad?