User`s guide

Decrement
Octave
0284 4200
If
(v2#00)
skip
0286
L220
Go
to 0220
0288
72FZ Y2=Y2+82
0284 EFAI If
(vF#hex
key) skip
028C 128A
Go to 028A
Wait for
key
release
028E
1220
Go
to
0220
Note
Table
o2go 00
B0
00
94
BB
A6
9D
FD
0298
DE
D2
EB
C6
84
8n
00
58
02A0
88
49
5D 53
4E
7
e
6F
68
02A8 7
5
62 41 45
00
28
BB
24
0280
2E
29
26
3E
37
34 3A
31
0288 20
22
00
ls
55
12 16
L4
02c0
13 lE 18 19
lD
18
10 I
1
The
New
York
Amateur
Cornputer Club
has
annor.rnced
the
creation
of
a
regular
"Computer
Faj-r
and
Flea Market" to be
held
on the
first
Sunday of
each
month.
Conputing systems exhibiting
applications
software, computer
company vendorsr r€pr@sentatives
from
local computer
clubs' wiLl-
be there.
Meetiogsr
lectures
and
tutorials
on hardwarer softwarer
business systems
and
beginneret
classes
wil-l also
be held"
PLACE
r
Irving
Plaza
12
Irving Plaee
(corner
of East
15
St. NYC.)
TIIIEr
11am.to
5pm.
Lectures
from
1pm.
ADMISSIONT
$1,50
DATEST March
2,
April
t3,
May
4, June
1
For
more
information,r contact
Daniet
at
212-263-3003
or
phone
the
New
York
Amateur
Computer Club
at their
"Hot
Line" number
864-4595.
sET
cARRr/ILEAR cARRy
by Tpm
Swan
The
1802
rnachine
language
instruction set contains
no
instructions
to
dlrectly
set or
cLear
the
one
bit
carry
register DF.
Normally,
the
procedure
is
to
rotate a
zero
or a one
Uit
from D
into
DF bui
of
course
this
will change
the value in D.
A
sirnpler
and shorter
method
is
given
beIow.
-
To
clear DFr
ADI
$OO
;Add
0 to
anything
sets
DF
=
O
To
set
DF r
SMI
$00
;Subtraet
0 from anything
sets DF
=
7
Notice
that
only DF
is changed by
either of these
commands
the
value
in
the
D
register
is not disturbed.
2,OB/09,36