Willy Wonka almost done

By Thomas Lövskog
1 min read

Table of Contents

The latest PCB revision of the Willy Wonka is back from the fab and assembled. Good news — it works.

Most of the time on this round went into getting the GreenPAK configuration sorted out. The address decoding and page select logic is now pretty much locked down. There were a few timing tweaks needed to get the color RAM banking to behave reliably, but nothing that required bodge wires or board changes. Always a good sign.

Left to do

What's left now is the boring-but-necessary part: test, test, test. Run it on different board revisions, poke at edge cases, and make sure nothing falls apart when the VIC chip and CPU are fighting over bus cycles.

The other big remaining task is writing a player or demo that actually shows off the extended color RAM. Having 16 pages of color attributes available is meaningless if there's nothing to demonstrate what you can do with it. The plan is a small rasterline-driven routine that swaps color pages on the fly.

More updates as testing progresses.

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Willy Wonka

Last Update: March 29, 2026

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