Search found 237 matches

by lliont
Thu Apr 25, 2024 11:27 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

Yes and this with an 8-bit bus vs 16 bit of Gold card but speed is not everything.

I'll try to make a batch after more testing to every QL I can find.
by lliont
Thu Apr 25, 2024 6:07 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

But this I think it is the final version maybe with only minor changes.


1714064005191.jpg
by lliont
Thu Apr 25, 2024 12:54 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

Hi Yes there are totally useless pins and one nc pin I think, so if one wishes he could use them, also the wires are not needed for issue 6 and 7 boards. I like it protruding but maybe a bit less, I make pcb's fast because as you have noticed I change the specs and features constantly :D ( I hope fo...
by lliont
Wed Apr 24, 2024 6:03 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

Thank you
I forgot to mention it is now running at 16Mhz and I intend to add a fast serial port SER3.
by lliont
Wed Apr 24, 2024 4:35 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

As Peter and one's complement suggested an expansion card board is ready and it solves many problems. It also needs two wires and a small board over zx8301 socket but it is so much easier to install and no need for 3d printed plate for the ports. I also changed fpga to the newer cyclone 10 LP that I...
by lliont
Tue Apr 09, 2024 9:04 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

It started as 2 separate boards but then I made a single board to eliminate the cables, that was ok in my ql with the changed sockets. It was when I tested it to another QL I realized the height problem :( I didn't tied the unused inputs to a fixed voltage because their outputs are always disabled (...
by lliont
Sun Apr 07, 2024 8:49 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

thanks for the idea, we will see.
First I'll test the short pins tetroid suggested.
by lliont
Sun Apr 07, 2024 6:18 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

I'll think about how it could be adapted to use the expansion port when I find some time, I am busy with some other things these days.
Worst case I could simply use few cables to the socket or something.
by lliont
Fri Apr 05, 2024 6:17 pm
Forum: Hardware
Topic: FPGA replacment for the ZX8301 ULA and more
Replies: 265
Views: 100231

Re: FPGA replacment for the ZX8301 ULA and more

Nice I'll look for the short one, thanks.
by lliont
Fri Apr 05, 2024 5:34 pm
Forum: Hardware
Topic: CPLD replacement for ZX8301
Replies: 230
Views: 52402

Re: CPLD replacement for ZX8301

Yes I'll soon send you email