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48G Destructive Teardown - EEVblog
05-23-2017, 07:58 PM
Post: #8
RE: 48G Destructive Teardown - EEVblog
(05-23-2017 01:52 AM)Han Wrote:  The other oddity about that calculator was the jumper between ROM and RAM chip. The calculator presumably got upgraded to 128KB, but such an upgrade never required anything more than a RAM chip replacement.

In the video he said that the original owner damaged a pad when doing the upgrade, so that's probably why there's a jumper wire. I also got the impression that the upgrader didn't know what he was doing 20 years ago when he did the upgrade, which is why it looks like a complete mess during the teardown (just look at the faceplate).
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RE: 48G Destructive Teardown - EEVblog - Eric Rechlin - 05-23-2017 07:58 PM

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