Thats called "passivation".DigitalQuirk wrote:6502dude wrote: It also doesn't "Rust away;" rather, copper forms a protective layer of oxidization, green in colour, which can preserve it for many thousands of years.
Best way to referb keyboard? Dead 1541's :(
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eslapion
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If the copper is a couple of inches thick such as on old plaques and monuments... copper used on PCBs is generally a few thousanths of an inch thick...DigitalQuirk wrote:It also doesn't "Rust away;" rather, copper forms a protective layer of oxidization, green in colour, which can preserve it for many thousands of years.6502dude wrote:While copper oxidizes, it is not generally refered to as "rust".eslapion wrote:If they were bare copper, they would have rusted away.
Anyways, copper oxide is a very poor quality conductor. If they was no gold on the VIC/64's keyboard's contacts, these keybaord would have become useless and unrepairable after only a few months of use.
Be normal.
ral-clan wrote:Just a quick tip: if the VIA chips in the drives have failed, it may be only one chip per drive (there are two in each drive). You might be able to get two good chips out of the bunch, just keep swapping them around and see what happens.
Just a update...
UC2 6522 VIA (MOTOR CONTROL INTERFACE)
failed in both it seems. I swapped the other VIA from the other bad drive and im rewarded with another working 1541
