Embarrasing oversight

An investigation into the behaviour of the Yamaha OPL3 chipset.
With a view to a more accurate emulator

Embarrasing oversight

Postby carbon14 » Wed Aug 22, 2012 9:37 am

While working on the OPL-2 project, I had some trouble with my prototyping plug block. It's a wishboard, and I discovered, eventually that the two power rails are actually split in two. I wasn't getting any power to the chip because I was powering one end of the rails, but the chip was connected to the other ends, with a split in between.
No problem, sorted it out, everything works great.

But then I thought to myself, I'm sure I didn't do that when I built my digisnap.

I went and checked. It's built on exactly the same model wishboard, and it's true, I didn't connect the two halves of the power rails. It's been working perfectly for me for the past two years, despite the fact that the tri-state flip-flops which act as latches have NO POWER.
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