Re: QUESTION pagecounts

>Dunno...it's years since I had the Apple LW!

You seemed very clear on the subject when you said

"The Apple LaserWriter II/IINT used an EEPROM - no battery needed. The
downside was that it wore out after a few thousand writes, so was used
only for rarely-changed information - not pagecounts!"

An odd thing to say when you replied to my concern over swapping boards
in an LW NT about the pagecount. It did clearly employ a form of
non-volitile memory. The LJ II used NVRAM to store info like
pagecounts. It could be this data was stored as part of the Canon SX
engine seperate from the system board. But that doesn't take into
account data as part of the appletalk protocal, which typicaly used
NVram. I'd wager a battery was required, but a service manual which
tends to speak to the lowest common denominator, if it said "no battery
is required" might mean "no external battery replacement is nessicary
as the lifespand on the NVram is 10+ years".

But since you have a manual... I would suspect that if you would look
up the fuction of dipswitch one it would tell you want it resets.

I'm not going to say what the LW NT used because I don't have any idea.
I know it kept track of pagecounts and being appletalk stored the last
useable address two things that would be annoying to put in an EEprom.
There was also trivial little things like baud rate for the serial
ports, printer name, basic printer settings which were not changed all
that offen that could have been stored in an EEprom I imagine... but
really it's a total mystery to me why being up EEproms when talking
about pagecounts. Seems odd and I have no idea what your point was.

.

Relevant Pages

  • Re: Problem with Blade 1000
    ... Start Reason: Initialize Machine ... Or the Field Replaceable Unit prom died. ... which a battery backed unit and the battery. ... eeprom but have had to replace Blade-150 eeprom already. ...
    (comp.sys.sun.hardware)
  • Re: EEPROM or NVSRAM
    ... Micros with EEPROM capability are bit more rare & expensive. ... about data storage, not program storage. ... and it's the same basic memory array, so maybe I shouldn't have heart ... changing out the battery, a BMF cap should do it. ...
    (sci.electronics.design)
  • EEPROM or NVSRAM
    ... an outboard serial EEPROM. ... (which is a FANTASTIC holder for this battery! ... memory dumps when replacing the cell. ... The application will be inside a work truck, permanently attached, so ...
    (sci.electronics.design)
Loading