• DTK NETT-2000

• DALLAS RTC coin cell empty

The motherboard's Real-Time Clock (RTC) chip contains a coin cell that may have drained, causing the loss of CMOS settings. This can result in an inability to save settings, causing system instability or failure to boot. To fix this, the RTC chip can be replaced with an equivalent or repaired by cutting into it and soldering on a new external coin cell holder. Replacement guides are available at https://github.com/necroware/nwX287 or https://github.com/necroware/nw12887, depending on the actual chip used.

Interesting, cache is implemented in discrete logic and PALs. And it only operates at 20MHz. It would be interesting to know how this compares to a 25MHz 486 with only L1 Cache (as many early 1990 designs were.) - mR_Slug