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Simtel MSDOS 1992 June
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SIMTEL_0692.cdr
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laptop
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laptops.rev
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1989-01-08
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| Laptops: Decisions, decision, decisions |
-------------------------------------------
Last year at about this time the "field" of laptop contenders was
fairly small and the prices were fairly high. In fact the choice of
laptop was fairly easy, provided you were willing to make some big
sacrifices in computing power in order to "have one for the road".
In the July 21, 1987 issue of PC Magazine (Vol. 6, No. 13), Paul
Somerson raved about the Z-183 which "sprints along at 8 MHz". The
October 27, 1987 issue of PC Magazine (Vol. 6, No. 18) recommended
"for big spenders, the dazzling Zenith Z-181 or Z-183 Portable PC . .
with its 10-megabyte hard disk, 8-MHz clock speed, and remarkable
6-by 8-inch backlit display, the Z-183 remains a heart-stopper."
Less than 6 months later, however, the Z-183 fell from grace; this
time Mr. Somerson criticized the Z-183 as, among other shortcomings,
being "a real arm-stretcher" and with a 8-MHz speed, it "plods along
with an anachronistic CMOS 8088" (March 29, 1988 issue, Vol. 7, No.
6). What happened to it being a "heart-stopper"? Was Mr. Somerson
guilty of having a fickle heart, did the Z-183 change for the worse,
or was there something else?
Choose door number 3: something else. That something else was
improved competition offering laptops with more speed and more power.
Laptop computers have finally come of age. Finally convinced that a
promising market for laptops does exist, manufacturers have been
falling over themselves to get new and improved laptops into the
stream of commerce. A week does not go by now without an announcement
in the computer trade papers about a new laptop.
No longer is this market limited to just a few companies such as NEC,
Toshiba, and Zenith. The Olivetti's, Samsung's, Mitsubishi's, and
many others are entering the fray and each trying to outdo the others
with feature-rich portables. These features include 286, 386SX, and
386 chip technology; substantially improved screen displays; the
addition of standard, non-proprietary expansion slots; increased RAM
and support for EMS; and larger storage capacity. If rumors are to be
believed, we may even see color screen displays in the near future.
The consumer is the beneficiary of this increased competition.
Although choosing a laptop in today's market will not be as easy as it
was a year ago, it will be much more exciting.
I have prepared a chart, set out below, comparing various features of
some popular and/or new laptops. This chart contains only a sampling
of the many laptops presently available.
In view of the prospects of an increasing number of faster and more
powerful laptops entering the market in the next several months,
anyone interested in purchasing a laptop should use this chart as a
starting point only and then keep abreast of current laptop
developments through PC Magazine and other computer publications. Two
magazines devoted to portable computers are listed at the end of this
column.
Finally, I have included a brief discussion about the variety of
screen display technology that is or may soon be available for
laptops.
* * * * *
--------------------------------
| COMPARISON OF SELECT LAPTOPS |
--------------------------------
------------------------------------------------------------
MODEL Datavue Datavue Mitsubhishi
Spark Snap MP286L
1+1
============================================================
CPU 80C88 V20 286
SPEED 9.54 9.54 12
RAM 384 640 640
DRIVE 1x3.5 2x3.5 2x3.5
/720k /720k
SCRN super 10.5" 11"
blue NTN
super
BATT nicad nicad 3d party
WT 9 10 15.9
EXPANSION n/a 1/2 size 4 {proprietary}
LIST $995 $2,295 $3,195
OPTIONS 3.5 dr., 20MB, 20MB ($3,995),
BL, EL, BL super ext. 3.5" fd,
expansion or BL EL num.keypad,
chassis 1 fd/20MB add'l 2MB
combo RAM
------------------------------------------------------------
MODEL NEC NEC NEC
MultiSpeed MultiSpeed MultiSpeed
EL HD
CPU V30 V30 V30
SPEED 9.54 9.54 9.54
RAM 640 640 640
DRIVE 2x3.5 2x3.5 3.5
/720k /720k /720k
20MB
SCRN super 10.5" BL
BATT nicad nicad nicad
WT 11.2 12 14
EXPANSION n/a n/a n/a
LIST $2,195 $2,495 $3,695
OPTIONS BL, EL BL
------------------------------------------------------------
MODEL Toshiba Toshiba Toshiba
1000 1100+ 1200
============================================================
CPU 88 86 86
SPEED 4.77 7.16 9.54
RAM 512 640 1MB
DRIVE 3.5 2x3.5 3.5
/720k /720k
20MB
SCRN super super super
BATT nicad nicad nicad
WT 6.4 10 10.8
EXPANSION n/a n/a n/a
LIST $1,199 $2,099 $3,499
OPTIONS 640k expansion expansion
LIM/EMS, chassis chassis
/720k num.keypad
battery charger
num.keypad
------------------------------------------------------------
MODEL Toshiba Toshiba Toshiba
3100/20 3200 5100
============================================================
CPU 286 286 386
SPEED 8 12 16
RAM 640 1MB 2mb
DRIVE 3.5 3.5 3.5
/720k /720k /1.44MB
20MB 40MB 40MB
SCRN gas gas gas
BATT n/a n/a n/a
WT 15 18.7 15
EXPANSION n/a n/a n/a
LIST $4,699 $5,499 $7,499
OPTIONS num.keypad expansion
chassis, num.
keypad, add'l
2MB RAM
------------------------------------------------------------
MODEL Zenith Zenith Zenith
181 183 SupersPort 88
============================================================
CPU 88 88 88
SPEED 8 8 8
RAM 640 640 640
EMS
DRIVE 2x3.5 3.5 2x3.5
/720k /720k /720k
10-20MB
SCRN BL BL BL
BATT nicad nicad nicad
WT 11.9 15 <12
EXPANSION n/a n/a ?
LIST $2,399 $3,599 $2.399
OPTIONS 20MB, 20MB, 20MB ($3,599)
recharger recharger
------------------------------------------------------------
MODEL Zenith Zenith
SupersPort 286 TurboSport 386
============================================================
CPU 286 386
SPEED 12 12
RAM 1MB 2MB
EMS EMS
DRIVE 3.5 3.5
/1.4MB /720k
20MB or 1.4MB
40MB
SCRN BL "Page
white"
BATT nicad nicad
WT <12 25
EXPANSION ? ?
LIST $4,999 $7,999
OPTIONS 40MB ($5,599) 2,400
modem($8,499)
------------------------------------------------------------
NOTE REGARDING ABBREVIATIONS AND TERMS USED
===========================================
BL = Backlit supertwist screen display (see below)
EL = electroluminescent backlit supertwist screen
display (see below)
Expansion = IBM standard / nonproprietary expansion slots
Fd = floppy disk drive
Gas = gas plasma
Nicad = nickel cadmium battery [as opposed to lead acid]
Page white = Zenith's new display technology; see
discussion of fluorescent backlighting below
Super = supertwist screen (see below)
SCRN = screen
* * * * *
-----------------------------
|Laptop screen technologies |
-----------------------------
1. Liquid Crystal Display (LCD)
a. General
Like the technology used on watches and
calculators, the LCD has the advantage of being
lightweight and consuming little battery power.
Its disadvantages include poor
contrast/readability.
b. Supertwist
i. non-backlit
The screen is twisted so that it will reflect
light in all directions and not just straight
ahead.
ii. backlit
By adding light to the supertwist screen,
readability is improved by at the expense of
greater battery power consumption.
(1) Electroluminescent (EL)
The screen, containing phosphor, glows
when powered.
(2) Fluorescent
Small tubes provide the backlighting.
Slightly more battery power is used than
with the electroluminescent screens.
Examples include Datavue's amber gaslight
and, apparently, Zenith's newest laptop
entry, the TurbosPort 386, featuring
black characters on a white screen. This
display, which Zenith calls its "page
white" display, is the product of an
extra layer of polarizing material which
filters out blue light from the screen.
2. Neutralized Twisted Nematic (NTN)
Light is used to increase the screen's contrast ratio,
resulting in a black on white image. Mitsubishi's new
MP286L with an 11-inch cold cathode tube (CCT) screen
and black characters on a white background (with
reversible screen colors), which Mitsubishi claims can
be read in all light conditions, is an excellent example
of this new technology.
3. Gas Plasma
A flat panel non-LCD screen. Each screen pixel is on or
off, providing a high contrast ration but requiring
greater power. Toshiba's high-end laptops use this type
of technology.
4. Active Matrix
A transistor is assigned to each screen pixel, resulting
in a contrast equivalent to a backlit LCD but without
the backlighting. Apparently the screen becomes
unusable if any one transistor ceases to operate.
According to *DataGram*, this technology is being
considered by several laptop manufacturers but is not
presently available.
* * * * *
For a complimentary subscription to Datavue's interesting periodical
entitled: * DataGram: The Exciting World of Laptop Computing * write
to:
DataGram
4351 Shackleford Road
Norcross, Georgia 30093
Portable computer magazines:
Portable Computer Review
IDG Communications/Peterborough
80 Elm Street
Peterborough, New Hampshire 03458
(Spring '88 Portable Computer Review: $3.95)
PICO Magazine
Post Office Box 428
Peterborough, New Hampshire
(1 yr. subscription: $29.97)
Sincerely,
Todd S. Rogel
Raleigh, North Carolina
July 2, 1988
Home (919) 851-2103
MMS (919) 779-6674 [151/102]
NCC (919) 851-8460 [151/100]