Testing the Commodore 64 250466 board

Last Saturday I introduced the 250466 longboard from 1986 I bought for my Commodore 64 “Aldi” machine. I’ll admit, I could barely contain my excitement, for this was the first longboard C64 board I’d had in years. But does it work? Today I wanted to find out, and take a closer look at the ICs that make up this specific board. Before testing though, a few of you asked for a better comparison between the longboard and newer shortboard variants of the Commodore 64 motherboard. Here’s a (slighly!) better top-down view with my “new” longboard above, and the newer 252311 below: The case of the Commodore 64C might be playing a visual trick here, but both boards are the same length, and have ports in the same places. Generally the longboards were found in the classic breadbin cases, and the shortboards in the later wedge-shaped 64C, but there was also a degree of overlap. Note that the 64C case in the photo above has unused mounting holes for the larger board. This was the same with the later…