The original schematics I provided for the Arduino + AY-3-8910 was a bit crude for the audio output, it works, but it’s easy to get the audio saturate. I will propose you an update on this, taken from an actual schematic, the one used on the Oric 1/Atmos Continue reading Update on AY-3-8910 schematic
Yes, nearly 1 year after the release of the Issue 6.1, I finally made the Issue 7 that would fix the VSYNC problem the previous release had!
What’s new in the Issue 7:
- There is now a 2 pin header to plug a reset button
- The hardware VSYNC should now work correctly
- One of the two ROM socket has been removed to reduce the schematic complexity, but it is now possible to use the original ROM, or any EPROM without the need to change anything on the PCB, because the /ROMDIS signal has been changed!
- Better, it is now possible, and easily to use a 32K EPROM with the addition of a switch (there are pin on the PCB for this) to select the memory bank.
Some magic stuff dating about end of 2010, running on magic electronic paper.
Video after the break.
The WonderLyzer PCB production has finished! shipping is near!!!
After looking on my project roadmap, I’ve discovered that I’ve never released the Replic’Oric schematics!
But first, please be warned, this revision is not the final one for the Replic’Oric project as the hardware VSYNC part is currently broken and shouldn’t be implemented the way it is now on this schematic.
A newer version of the Oric Schematic has been release, please use this version for reference instead of the one in this post.
I’m sending right now the data to process the batch of PCB, due to some test (printer’n’paper test are the best thing to do!) I found that I stupidly use the width of the internal cartridge PCB instead of the cart itself, and found out that the PCB was going more than expected in the swan, so I do a small modification on the PCB to use a more accurate width, and add a T shape like on top to support more the cart connector, and adding a small surprise on this part.
I’ve just finished the design of the WonderLyzer board, and I will send the PO for the pcb before the end of this week, so if you want one, your are running out of time, so be quick!
Continue reading More on WonderLyzer
As I am working on my big WonderSwan project, I will quite soon make a PCB run for making analysing stuff more easy and clean, that why I will introduce a new accessory: the WonderLyzer.