Applied Engineering Vulcan IIGS User Manual page 36

Push down
on
number
side
to
dose (ON)
n~o~
d
~~-==y
Side
View
,"",<91'1_)
Pushdown on
side marked "OPEN"
10 open
(OFF)
Flipping
the
Switches
liemOle Ugh' Jock
In addition 10 the on·bo:.Jrd LED, there Is a two pin
COnnector for a
remOle drive actIVity indicator LEO
Applied Engineering offers an LED extension option. Call
A:: Sales to Ofdcr at (214)
2~
1-6060
If you're so inclined, you CIIn make an extension tighl to
run from the connector a nd allach il under the from panel
next to the green
LED, MJke Sure thJt no
wires
arc
expo5ed; any exposed Wires may soon out the
moIherboard.
Warning: Apptiea Engineering
is not
responSible
for any wmage resulting from modifications to
--'you r computer.
The connector
IS wired
a$
follows;
Pin J (the right pin when fa cing the board from the
chi p.side righl side up) Anode of the
LED
PIn 2 Cathode of the LED
With
the lid off. remove the front panel by releasmg the
three uhs under Ihe front edge of the computer
Note the "pocket" in back of the elellr window on the
undefliide of lhe front panel where the green
LEO
shines
through. It Is possible to fit 3n LED Into this pocket.
PP NDIX
D
"Inter/eaver" (20 and 40 Megs only)
lhe progl'2m, InterJe:lVer,
IS
included for
those who W3nt
10
get all the sJl(.'(.-d po6Sible from their Vulcan for their
most
used appUGltion. Fiflil. we'll give a brief overview of
wlul interleave Is, If. 3fter reading the description. you
dt:eide you WlInt
10
Iry to optimize your setup, carefully
follow the diK'Ctions for using InterJt. " aver.
Warnln.s
Cnangi~,~~e int:~eave ~~ you~.2>~~'::.
drive
Is not
nCCCS5:lry··genernlly, the inter!cave to
which we
SCI
your drive
WOOl>
well for
ITIOSI
application.'>. IntcrlCOlV{'r copies a nd rewrites your
lurd drive's COlUents. So. unless you understand
wlul )'ou'f\' doing, )'ou could do ",ore barm
Ibm.
Rood.
Aboul Inlerleove
A dLSk's interleave
IS
the manner in which the disk is 'iet
up to be (COld E:le h tfllck
on
the disk
is
dIvided into
sc"ernl seetOfli, tOl:almg anywhere from
26
to
32
depending uJXln the manufaaurcr. When infonnal!on
I~
pulled from J disk, the different sectors are read one al
a
lime. TIle whole time lhe compuler is retrieving Ihe
infonnallon, the disk Is spinning TIle first sector Ihal Ihe
progl'2m
accesses
Is read and processed and lhen Ihe
computer looks for the next sector If the infonnation i)
still being processed from the first sector ",hen the
second!iCClor SpillS by. the
comput~>r
will h..we to
W;1I1
for
the disk to rotate completely around to read
the ~'COnd
sector.
Tbc: interle:lve detennincs
the order of
the !iCCl0fS. With a
\; I imerleave. sector two imme<liately follows ~'CtOf one
With a
2; I
interlt.';avc, every OI:her sector is numbert.'d. W
Ihal seclor two
is
physically the Ihird sector. lnlcrJca.es
can be set up
10
one less
th~n
the number of St.'C'!ors on
~
disk (e.g. 25: I on 3 26 S(:Clor disk).
•