DEC VT-510: Inescapable NVR Error

[MissArgent]

So, I got my first terminal - a DEC VT-510 at a solid price. Sounded like it would be fine - only issue was a NVR error on boot. Figured that'd be simple enough - the manual doesn't mention anything about RTC batteries, but I should be able to just restore the defaults and get along fine, right? Well, I restored the defaults and tried to save the settings...

Well, maybe this one won't be so simple. I needed to go under the hood to make some vertical size adjustments anyways so I thought I'd look for a RTC battery in case it needs replacing, but I couldn't spot anything. Anyone have pointers for me? The terminal itself works fine, but having everything reset on every restart could be a bit of a core as time goes on.

 

[bqt]

So, I got my first terminal - a DEC VT-510 at a solid price. Sounded like it would be fine - only issue was a NVR error on boot. Figured that'd be simple enough - the manual doesn't mention anything about RTC batteries, but I should be able to just restore the defaults and get along fine, right? Well, I restored the defaults and tried to save the settings...

Well, maybe this one won't be so simple. I needed to go under the hood to make some vertical size adjustments anyways so I thought I'd look for a RTC battery in case it needs replacing, but I couldn't spot anything. Anyone have pointers for me? The terminal itself works fine, but having everything reset on every restart could be a bit of a core as time goes on.

As far as I know, it's not using battery backed ram, but an EEPROM.

 

[MissArgent]

Yeah, I've IDed the EEPROM and have replacements on the way from Mouser. Wish me luck! Also, good grief these plastics are frail.

 

[MissArgent]

Update: It was E7, the Atmel EEPROM (natch). Replacing it caused settings to commit just fine.