New I/O Board
It consists of 2 boards. Digital base is compatible with existing Digital I/O Board and secondary SDRAM. With AV Board instead of SDRAM it turns into full featured analog output board with chip DACs on both video (24bit RGB) and audio.
For analog output the framework update (and all cores) is required.
I will update both hw and framework in couple days.
Comments (26)
A question please - I've just bought one of these boards and it looks great. I would like to use analog audio out. What DIP switch settings do I need on the DE10-Nano for this? Thank you.
You don't need to change any switches. Basically all OFF is ok. Just make sure core is updated to support new boards
I'd love to see this image format implemented in a core, https://r0k.us/graphics/png16Tech.html#introduction
Implemented format of snapshots covers all MiSTer needs. New formats won't bring anything new.
I used the latest file but it doesn't work. Analog video has no video output and the LED does not light up. But the LED lights on de10 are normal.
If you use new io board then make sure you use updated core too
I love the versatility of the solution. Thank you !
It would be cool if there is some MiSTer IO header switch - something like (passive) scart switch with physical switch on MiSTer case so we could switch between secondary RAM and analog board.
it won't work because switch and wires will introduce delays and signal rings. And switching of 36 contacts is something unrealistic.
What DAC is being utilized? Does it need 24 connectors or is some multiplexing at work?
24bits, no multiplexing. ADV7125
Somewhat unrelated question but maybe relevant if the framework gets updated related to audio output. I'm currently in the process of creating an audio filter for the N64 core and possibly other console cores after that. The available third order low pass filter is not quite steep enough to perfectly match the frequency response of the original N64 console. Would there be a possibility of enabling the use of a 4th order lpf in the future?
filter requires DSP blocks and it's not a good idea to use it for framework as some heavy cores cores like PSX, N64 may need them. Probably filter can be redesigned to re-use DSP blocks. Will see.
Is it compatible with your case? Or a new case will be necessary?
Yes, it's fully compatible with my case (Analog I/O version). You only will have a small hole in place of SOG switch.
Will this still support HDMI + Analog output at separate resolutions? So, 240p via analog and 1080p via HDMI?
It works the same as older Analog I/O output, but gives 24bits instead of 18bits.
Where is the 3,5mm jack below the sdcard slot for? Is that on a different red PCB?
it's ADC-in board (red)
It seems i wasn't clear about features. You can have either dual SDRAM OR Analog output. Not both at the same time.
Cool. So this could have dual ram and vga out?
Nop. You can have DUAL RAMor VGA featuring a 24bit DAC. Not both at same time.
This is awesome. Looks exactly what I need as my Arcade cabinet requires analog audio input, but I'd also like to add more RAM to my system for any new cores that need it.
Which new cores? ATM only Saturn (and only for testing) core can use double SDRAM memory
Very exciting, but I'm a bit confused. Is it an addon for existing io boards, or would I get a replacement for my existing io board plus a little secondary board? What is pictured in the two photos exactly? Sorry, I'm smoothbrained
It’s a new different digital board. If you need the analog features you can add the small secondary board.