Search found 9 matches

by Milesy303
Fri Jun 22, 2018 1:42 am
Forum: NES Hardware and Flash Equipment
Topic: Controlling program ROM with a RPi or Arduino
Replies: 13
Views: 5770

Re: Controlling program ROM with a RPi or Arduino

This one takes 7.5 input. Can't see much about levels within though. https://www.digikey.co.uk/product-detail/en/intel-fpgas-altera/DK-CYCII-2C20N/544-1736-ND/1207144?utm_adgroup=Evaluation+Boards+-+Embedded+-+Complex+Logic+%28FPGA%2C+CPLD%29&mkwid=sFCORBnES&pcrid=259861725325&pkw=&pmt=&pdv=m&produc...
by Milesy303
Thu Jun 21, 2018 4:59 pm
Forum: NES Hardware and Flash Equipment
Topic: Controlling program ROM with a RPi or Arduino
Replies: 13
Views: 5770

Re: Controlling program ROM with a RPi or Arduino

Can anyone recommend a FPGA dev board that would be suitable for this project?

I see the everdrive N8 only uses a Cyclone II chip so should be cheaper than the IV to do something similar with that.

What about the cheaper Chinese boards?
by Milesy303
Mon Jun 18, 2018 2:33 pm
Forum: NES Hardware and Flash Equipment
Topic: Controlling program ROM with a RPi or Arduino
Replies: 13
Views: 5770

Re: Controlling program ROM with a RPi or Arduino

Could you do something with PFGA fast enough?
by Milesy303
Mon Jun 18, 2018 1:48 am
Forum: NES Hardware and Flash Equipment
Topic: Controlling program ROM with a RPi or Arduino
Replies: 13
Views: 5770

Re: Controlling program ROM with a RPi or Arduino

Then you can put Atmega16/32, USB, RAM (628512 - 4 MBit), battery backup and you got perfect EPROM emulator, you can project the PCB to make the EPROM pinout like for DIL28 NES Mask Roms or any DIP32. Atmega has 32 pins, 2 for controlling USB and 30 for controlling RAM (A0-A18, D0-D7, /CE, /OE, /WE...
by Milesy303
Mon Jun 18, 2018 1:46 am
Forum: NES Hardware and Flash Equipment
Topic: Controlling program ROM with a RPi or Arduino
Replies: 13
Views: 5770

Re: Controlling program ROM with a RPi or Arduino

A while back I traced out and drew an (incomplete) schematic of the ROM emulator I used to always use. Wasn't something I built, it was designed in '93 and I bought a used one in '99. Connected to target board with an IDC to DIP adapter, you'd just plug that into an EPROM socket. On the other end, ...
by Milesy303
Mon Jun 18, 2018 1:43 am
Forum: NES Hardware and Flash Equipment
Topic: Controlling program ROM with a RPi or Arduino
Replies: 13
Views: 5770

Re: Controlling program ROM with a RPi or Arduino

Thanks for the response, I thought that was maybe going to be the answer. Yes the Pi is slow, experience there but I thought the atmega chip at least had some sort of capable speed? The Arduino is reasonably low level compared to the Pi. Yeah, still no. It turns out that usually when you get a micr...
by Milesy303
Thu Jun 14, 2018 3:27 pm
Forum: NES Hardware and Flash Equipment
Topic: Controlling program ROM with a RPi or Arduino
Replies: 13
Views: 5770

Re: Controlling program ROM with a RPi or Arduino

Thanks for the response, I thought that was maybe going to be the answer. Yes the Pi is slow, experience there but I thought the atmega chip at least had some sort of capable speed? The Arduino is reasonably low level compared to the Pi. What sort of chips and circuitry are the likes of the NES ever...
by Milesy303
Thu Jun 14, 2018 2:59 pm
Forum: NES Hardware and Flash Equipment
Topic: Controlling program ROM with a RPi or Arduino
Replies: 13
Views: 5770

Controlling program ROM with a RPi or Arduino

So I have desoldered the program ROM from a UNROM pcb and put jumper headers in its place. All I want to do in this first experiment is see if I can load the data from the controller rather than EPROM. File I/O is likely slow so I'll load the data into a byte array. Firstly is there likely to be any...
by Milesy303
Thu Jun 14, 2018 2:53 pm
Forum: NES Hardware and Flash Equipment
Topic: Controlling 2A03 w/ Arduino
Replies: 6
Views: 4847

Re: Controlling 2A03 w/ Arduino

I've controlled a C64 SID chip with a Pi. I a man going to use an Arduino soon.