Quote:
Originally Posted by ajs_derby
[...] have you ever tried removing the top from an OTP device to convert it to a conventional UV EPROM?
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Now that's taking things a bit far! (I've never been that desperate for UV-erasable EPROMs; places of employment tended to erm... provide a source...)
To illustrate the NVRAM problem, I've just grabbed a
SPARCstation 2 (the label on the bottom dates it to 19th March 1991) off the pile, shoved some RAM in it, connected the serial terminal then hit it with mains for the first time at least a decade...
("Serial #16777215" is, of course, FFFFFF in decimal.)
It...
- fails to identify the keyboard because there isn't one (there isn't a framebuffer card or much else in it either)
- detects the NVRAM failure
- resets the configuration to defaults (which includes turning on 'diag mode', so it tests everything, including the RAM, which takes ages)
- defaults to attempting to boot off the network (/sbus/le@0,c00000 is the network interface)
- fails as it isn't plugged into my LAN (wise, given the ethernet address!)
- drops to a prompt.
That'll be an M48T02 heading for the operating theatre...
Kat