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- Path: sparky!uunet!think.com!sdd.hp.com!network.ucsd.edu!sdcc12!cs!ewa
- From: ewa@cs.ucsd.edu (Eric Anderson)
- Newsgroups: comp.sys.mac.hardware
- Subject: Powerbook Duo 210 - New Observations
- Summary: Notes from the field
- Keywords: PowerBook Due 210
- Message-ID: <42998@sdcc12.ucsd.edu>
- Date: 3 Jan 93 10:51:25 GMT
- Sender: news@sdcc12.ucsd.edu
- Organization: CSE Dept., U.C. San Diego
- Lines: 102
- Nntp-Posting-Host: beowulf.ucsd.edu
-
- I posted some initial observations about the 210 about a month ago.
- Now that I've been to Japan and back, I have more comments which might
- be helpful to potential buyers. And please send me suggestions if you
- have similar experiences.
-
- 1. It snores!
- When my 210 is put to sleep, and the power plug removed, it snores.
- A light buzzing comes from the rear, near the power jack. In any but
- the quietest places, you have to put it within a few inches of the ear
- to hear it. Battery life is good when asleep, so there is no evidence
- that this is a fault. But I'd like to know if anyone else hears this!
- (When shut down, or the battery is removed, it is completely silent)
-
- 2. Battery life
- I took four batteries with me for the flights across the Pacific. I never
- ran out of power - the flight from Los Angeles is eleven and a half hours
- but between meals and movies I only used up two batteries. With the screen
- set to minimum (quite bright in a dark plane) and the conservation set to
- maximum (not too annoying) and processor cycling on, but full CPU speed, I
- got well over two hours of use per battery. These batteries discharge
- themselves when not in use, and after 24 hours they've lost maybe 30
- minutes of charge. So plan ahead and keep them topped off.
-
- I bet I could get close to three hours with a big RAMdisk. Anyone know
- what another 12 meg of RAM would do to battery life? It must draw some
- power after all...
-
- While we're talking about the battery, I have had zero problems with
- loose connections. Just make sure that it is tightly latched as intended
- and you should be fine.
-
- The battery slip-case has sharp innards that dig grooves into the battery.
- This is silly. Discard the case, or sand down the ridges in the case
- (not so easy). You can also slice off the pin way inside the case that
- latches the battery in there and it's much easier to use the case. The
- primary latch, in front, is good enough without that darn plastic pin.
-
- 3. The screen
- I love this screen, the gray looks so sharp compared to 1-bit. The
- shadows can be mostly eliminated with a good background (I like a slight
- variation of the 3-d grid that comes with the unit (the lighting direction
- on that grid is wrong!)) and proper contrast. The biggest offender for
- shadows is window title bars, sets of horizontal lines. (Try setting the
- background to white/black horizontal 1-pixel stripes - the screen becomes
- garbage!) I'm waiting patiently for someone to write an init or a new
- WDEF that uses 50% gray for the title lines - that would greatly reduce
- the shadows.
-
- I found that tilting the screen so that the "perpendicular vector" points
- slightly *above* my eyes gives the best possible contrast. (Ie, tilt it
- a little farther back than just looking straight on). This can be
- difficult to achieve in Economy Class, and one flight had seats designed
- such that if the person in front of me reclined, my 210 would get wedged
- between the tray and seat, and possibly crushed! So for peace of mind I
- moved to a seat behind an empty seat.
-
- When the screen is off, it takes a minute to warm up. It comes on fairly
- bright, but gradually increases to full. This is subtle enough that I
- thought it was my eyes for a while. Does anyone know what kind of light
- is used to light the screen? Do they ever burn out? Should I keep them
- off when I'm plugged in and the light is not needed?
-
- 4. RAM required for system.
- With networking off, and few inits, the system takes some 1300K. That
- isn't bad, and I know devoted people can trim that further. Be sure to
- toss (or relocate) the QuickTime extension if you don't need it.
-
- 5. Keyboard
- This keyboard just isn't a desktop keyboard. It is quite adequate, but
- the spacebar takes some getting used to and it will always be a little
- less comfortable/natural than a full-sized keyboard. For extended use
- at home you'll be happier with a real mouse and keyboard. The floppy
- adapter is adequate for this if the docks seem too expensive.
-
- 6. Travel
- It is wonderfully light. A nice padded case, power supply, spare battery
- and an appletalk cable shouldn't be over 8 pounds, total. Fits great in
- any briefcase, too.
-
- 7. Appletalk
- I find that a simple ImageWriter II cable works fine to connect any two
- Appletalk ports: 210 and LaserWriter, 210 and IIci, etc. It's a lot more
- compact than a pair of phonenet connectors!
-
- 8. Summary
- I love it. Sun Computers wants $1999 for them, developers can do better
- but may have to wait a while. They are abundant in San Diego stores.
- I see no need for the faster 230, though the dealer said most people are
- opting for the 230. My most desirable option now (in addition to four
- batteries, two power supplies and one charger (on order)) would be 4 or
- 8 more MB of RAM. It's a well balanced machine, but 4MB is a little tight.
-
- Please comment. Disagree or suggest things I've overlooked. Ask questions.
-
-
- Eric Anderson ewa@ucsd.edu
- Computer Systems Laboratory
- Department of Computer Science and Engineering (619)534-8604 (lab)
- University of California, San Diego (619)534-7029 (fax)
- 9500 Gilman Drive 0114 (619)534-6005 (cse dept)
- La Jolla, CA 92093-0114
-
-