I’m planning on using the Yamaha YM2612 FM synthesizer chip that has been used in both keyboard synthesizers, but also in the Sega Genesis consoles. The purpose is to add audio capability to my DIY Tablet computer...
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move.w vs move.l: The culprit of my circle problems
If you saw my recent post about malformed circles, you’ll see that I was pulling my hair out. I identified the root cause. It turns out that I was writing 0x00000fff, which caused the pixel I was setting to be...
Frame Buffer and Text Generation now working…
Now that I have the 4MB SRAM board installed, I now have a frame buffer that can keep up with the video bandwidth rate. The resolution and color depth is currently 800 x 480 x 12-bit. The computing shield I’m...
SRAM Frame Buffer is now up and running!
Exciting times for the Hope Badge Computer. Tonight, I’ve worked out most of the kinks with interfacing the new SRAM module which you can see in posts below this, to the J68 soft-core CPU. This means that I can...
New SRAM PCB is being built
So up to two SRAMs can be installed on this tiny 2″ x 2″ board. To the right is the connector, and the SRAMs are on the left. With current SRAM sizes, you can install 32-megabit SRAMs. That’s 4...
Modified memory controller now functioning on BEMICRO MAX 10 board
So after some minor heartache, I’ve managed to get a working memory controller on the BEMICRO Max 10 board that is easy to use. It uses a wishbone interface. The heart of the controller is from here but there were...
