ZIF socketed C64 for SID chip swap

ZIF (Zero insertion force) sockets are a great way to reduce the wear on chip pins when you need to swap them often, which is as you've guessed  what I need.

A simple 28PIN ZIF socket like this:

Can be used to quickly swap SIDs to run tests.




Video:

Best registration plate ever

Thats sadly not my car, can't have custom plates in Québec.
Oh well.

I'll get you 1771!

A full day spent figuring that chip's sound generation again. Recorded the two separate output pins in a multitude of ways, but there seems to be signal bleed whatever I try (even removing the chip and lifting one of the pins of its socket from the circuit)

This is not your typical PSG.

uPD1771C noise puzzle

LFSR feeding a delta-modulated logarithmic DAC???
Evil 80's reverse engineering protection???
Alien message?

.plan (audio version)

Anyone old enough to remember what a .plan file is?

I just got the idea of making a status update on what im working on, in audio form. These will not come with any explanations whatsoever. They might be current bugs, new features, tests or experiments from code im currently working on...

Here's the second one.

I'll twitter any updates to it as I go along (twitter.com/plgDavid)