From Thomas Lövskog
Today I got the new revision of my VIC NX* board soldered. It is now ready for hooking up to the logic analyser, oscilloscopes and start testing. Hopefully we can get this booting to the Ready prompt. The characters will be totally garbled though. The character ROM in this variant resides in SRAM and needs to be initialized. For that we need some code. Code that is executed in a hidden partition of the 512k for BLK6/7 before anything else. This is also where configuration firmware will reside.
Smoke test is done. All regulators work as expected, there is 5V where it should and Meatloaf is booting. The GreenPAK (little sub board in the top right corner. It will be soldered down as a tssop20 in the next run) manages the power, top LED and reset as expected.
However. To much work this weekend so it will have to be in this state until next week(end).
* VIC NX is my idea of an enhanced reproduction of the famous VIC 20. It is built on the 6502, 6522 and 6560/61 in DIP and the rest is modern of the shelf parts. Fully expanded and some extra features. See https://blog.lskg.io/tag/vic-nx/
The FATVIC, drop in replacement for 6560/61 is also shown here. This will be a nice test vehicle for that project.
VIC NX (fwd)
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