Microlog AIR-1 User manual

RADIO INTERFACE
CARTRIDGE FOR THE
COMMODORE:
□ VIC-20 □ ‘64’
□ with AMTOR
Compete termina with
software in permanent ROM
for Sending and Receiving
RTTY and MORSE Code.
MICROLOG
© MICROLOG CORPORATION 1985

TYPICAL
"TRANSCEIVER
key EXT.
o n #
5 PKR.
MIC
PTT
HAND KEY
OR
I KEYfK
(ALL CABLES SHOULD BE SHIELDED iR<q56CETG.

REVISIONS
LTR DESCRIPTION DATE APPROVED
U 5 -b
rttv7cw
CONTROL IN
NOTES
1.) Unless specified,
all resistors are i watt,
5% tolerance, resistance
values in ohms.
.) Unless specified,
all capacitor values are
in microgarads (yF).
3.) All capicitors 1yF
and above are tantalum
electrolytic.
4.) All .001 F capaci
tors are ceramic, rated
1 KV.
5.) PROM signal names —
are same as VIC- 0/C-64
computer signal names.
6.) D-10, Q-7, R-34, J
J-1, J-3, U~8, & 5- used
only on C-64 version.
• 2-NZ22Z /A A /B E U5ED
I N p / c e O F M RSA05
MICROLOG , .
CORPORATION (a-M)
AIR-V- VIC-20/C-64
RADIO INTERFACE CIRCUITS

VIC-20 J 1 C-64
GND
+5V
+5V
GND
CD0
C01
CD 2
CD3
CD4
CD5
CDfe
CD7
BLK3
BLK5
+5V
GND
GND
CAj#
CA1
c a e
CA3
CA4
CAS
CAb
CAT
CA8
CA9
CA10
CA11
CA12
i/02
i/£3
GND
i
10
11
13
LA
15
18
B
D
- f
K
M
N
U
_V_
12
16
I f
19
"25“
21
22
W
¥
z/<U
US PlMlfi
GND EX ROM
1/03
BLK5
CD7
CDfe
CD5
CD4
CD3
CD2
CD1
CD0
GND
GND
ROM H
CA1
CA11
CA10
CA9
CA8
CAT
CAb
CA5
CA4
CA3
CA2
CA1
CA2S
GND
REVISIONS
LTR DESCRIPTION DATE APPROVED
+ 6 V
fsk/cw- 2
CD0-i DI(B|T0)
CD2
CWfcrTY CTRL IN - ,
1
TX DATA FROM-L a j M
/fr c o mp u te r p F /77
RX RTTy OUT
C O 0
RX CW OUT
CD 1
CAI2T
CA6"
CA5'
CA4
CA3
CA2~
CA I "
CA^-121
CD0
_Z
CD I
CD2. 2
2
44
U 7
fSAME. FOR. U 0)
7 6 4
PROM
27
£ cas
gcA9
_rv.
2fi_
26-
CAI
CAltf
VIC- Q
~ BLK3 HpW
iJormal /
------ O
CD 7
CDfc
CD5
CD4
CD3
c-fc-q
USES 5-2 U6
20
22
J
PIN B
/77
/77 ^ 7
COMPUTER
"EXPAMSION)v
Port
TOLERANCES UNLESS
OTHERWISE SPECIFIED
FRACTIONS DEC ANGLES
m . 2/3/84
MICROLOG CORPORATION
M R-1: VIC-20 C-64
CATAe ADDRESS INTERFACE CIRCUIT
B
DRAWING NO.
DO NOT SCALE DRAWING
©BISHOP GRAPHICS. INC.
REORDER NO. 20621

AIR-1 BREEZES
Your Comments Welcome
Battery operation of the VIC-20: Add a 2 OHM, 10 watt resistor is series
with a 12-volt battery connected to the two pin "9 VAC" power jack on the
VIC for portable/emergency operation. (Direct 12-volt connection causes
excessive power dissapation in the VIC's regulator .
Some of the ICOM IC720's require a 22 OHM | watt resistor in series with
the mike PTT line on the AIR-1 to prevent a "transmit hang-up" condition.
(Radio will not go back to receive after transmission .
To prevent RFI/Cabling problems, use "braided" shield cables. Not foil
or spiral wrapped for ail Gozinta's and Gozouta's on the AIR-1. Several
passes through a toroid will limit radiation from the shield if necessary.
More battery operation: The newer ViC's are using externa, +5V power
supplies instead of just supplying 9 VAC. This is the same power supply
arrangement as the "64" with a 7-pin "DIN" power input connector. Unless
you want to run the DATASET, you'll only need to supply +5VDC. Use an
LM323 on a big heatsink directly off the 12 volts.
The FSK input on the ICOM 720 requires 22 KOHM pull-up resistor from
pin 6 to pin 9 on the 24-pin motex connector. Also, the pin 4 fixes audio
is too low to drive the AIR-1 in receive; use the speaker output.
Some early YAESU FT101's (A,B,E,EE will not key in CW to full power out
put unless R-28 (2.2 KOHM is reduced to about 330 CHM. It is located just
below Q5 & Q& in the lower left. (An easy method is to "tack" a 470 OHM
^ watt resistor across the existing 2200 OHM . The later FT101's & ZD re
quire that diodes D5 & D6 be jumpered (shorted instead of changing R-28.
To use the ICOM hand helds, IC2,3,4 connect a 20K resistor from the AIR-1
PTT output (tip to the ICOM mike input along with a direct connection to the
AIR-1 AFSK output (ring . This provides the necessary HIZ pull to ground and
activate the transmitter without shorting the audio.

CHAPTER 1
‘AIR-1’ PRELIMINARY CHECKOUT
After unpacking your unit, make sure that power to the computer
is turned off, then plug the Microlog AIR-1 into the “expansion port”
(The same one used for game and memory expansion modules), so that
the components are on top, facing up. If you are using an expansion
board, the components should face the front. Turn on the computer
and video monitor. For clarity, only the VIC-20 display is shown in the
following examples. The “64” display has one long top line with the
same information as the two lines of the VIC-20. The word
“MICROLOG” will appear on the screen for several seconds then the
following "TOPLINE” displav should appear on the video screen of the
VIC-20:
R B 0 6 0 W P M N O R U
O 0 0 : 0 0 U T C
This indicates that the system is set to receive (R) RTTY Baudot (B)
code at 60 WPM, and that the built-in dual tone demodulator is
selected in the Normal (NOR) mode with the “UNSHIFT on SPACE”
feature enabled (U). The ‘O' on the second line is the ’red-dot’
singletonc tuning indicator. A four digit HH:MM clock which should
start advancing is displayed on the second line.
The “Split Screen” cursor will be displayed in the left ccnter of the
VIC screen in blue, white on the C-64. The receive text cursor will be
at the bottom left VIC screen in black, yellow on the C-64. If using a
monochrome (black and white) TV/monitor, colors will appear as
shades of gray.
In the event that the above does not appear on your video
monitor’s screcn, chcck the cable between the computer and the TV
monitor to make sure that it is not shorted or open. You may also have
to adjust the TV monitor's various controls such as brightness, contrast,
etc. Some monitors provide a switch which selects a low or high im-
pcdence input. You should select the low impedence (75 OHM) input.
Also, if your monitor has a “PICTURE-DATA" switch it should be in
the “DATA” position.
Some basic programs require the full 38K C-64 memory, which
means you will have to unplug the AIR-1. Do not unplug with power
on, It’s also a good idea to disconnect all radio cables from the AIR-1
before unplugging it. An A.C. ground fault between your radio and
the computer could damage both the AIR-1 and the computer.

CHAPTER 2
* AIR-1’ SYSTEM
FAMILIARIZATION
2.1 KEYBOARD:
Your VIC-20 or ‘*64” keyboard has a total of 67 keys including all
of the familiar Alpha-Numeric keys. In addition there are special sym
bol keys, and two keys, namely ‘SHIFT’ and ‘CTRL’ which are always
used in conjunction with another key. The SHIFT key(s) are located on
the bottom row and the CTRL key is located on the left side above the
RUN/STOP key.
Note that some of the key tops have two symbols. For example, the
4 and the $ symbols are engraved on the same key top. Much the same
as in a standard typewriter you must hold the SHIFT key down while
pressing the 4 key in order to type the $ symbol. The CTRL key is used
in a similar manner.
In the following description, references are made to various con
trol functions or commands. These commands are executed by
simultaneously pressing the CTRL (or SHIFT) key plus one other key.
For example, a request to press (or type) ‘CTRL X’ means that you
must hold down the CTRL key, and while holding it down, press the X
key, then release both keys. Similarly, to type or press ‘SHIFT X’ means
that you should hold down the SHIFT key, and while holding it press
X. As soon as the X key has been pressed you can release both keys.
After familiarizing yourself with the location of the various sym
bols on the keyboard, type some Alpha-Numeric text. Observe that the
characters you have typed are displayed on the upper part of the screen
above the split-line. The ‘INST/DEL’ key which is located on the right
side of the top row may be used to correct typing errors. Notice that
typing ‘INST/DEL’ erases the previously typed character.
You can go to the “BASIC” computer mode by typing ‘CTRL’ and
Commodore keys. Since you are then under the restraints of “BASIC”
language, to go back to AIR-1 communication mode you must type:
SYS 40969 then the ‘RETURN’ key for the VIC-20. USE: SYS32777
then return on the “64.”

The split-screen option is user selectable. The ‘CTRL S’ command is
used to toggle the split-screen option on and off. To remove the split
screen and use the entire video display for receive text,
TYPE: ‘CTRL S’ (HOLD 'CTRL’ KEY AND PRESS ‘S')
In the non split-screen mode, you can still enter text into the buffer, you
just can’t see it appear before it's transmitted.
2.2.1 ADDITIONAL VIDEO COMMANDS FOR C-64:
The screen and text colors can be changed with a single control
command. “CTRL G” followed by a 4 digit number will change the
following:
2.2 VIDEO DISPLAY COMMANDS:
CTRL G
f
W screen background color
-►real time receive/transmit
-►transmit buffer
-►top line status display
The fs arc the same as the 64’s color codes as shown on page 139 of the
64 manual with one exception. To utilize a single digit for all 16 colors,
you must enter it in “Hexadecimal” that is 0 through F instead of 0
through 15. The colors are as follows:
0 = Black 4 = Purple 8 = Orange C = Med Gray
1 - White 5 = Green 9 = Brown D = Light Green
2 = Red 6 = Blue A = Light Red E = Light Blue
3 = Cyan 7 = Yellow B = Dark Gray F = Light Gray
The colors will change upon typing the forth digit. Note: The default
colors are:
(6) Blue Top line
(1) White TX buffer
(7) Yellow Real time RX/TX
(E) Light Blue Screen
These colors were picked as the best compromise for both color and
monochrome display. You can experiment with different color patterns
,to~Suit your individual requirements. Suggestions: 0657, 1AE0, 192A,
569D, 062C. Yoop
\
Note also, the tuning indicators and the RX buffer flags are always
displayed in red, except when jumping to AMTOR where they change to
the same color as the top line.
You can move the entire video display horizontally with the CTRL
H command. This should take care of monitors with limited horizontal
sync tracking range.

2.3 XMIT/RCV COMMANDS:
Typing SHIFT RUN/STOP’ or SHIFT RETURN’ (hold SHIFT’,
press ‘RUN/STOP’) places the system in the transmit mode. Observe that
the top line display has changed and is now displaying:
T B 0 6 0 W P M N O R CHAR
indicating that the system is now in the Transmit Mode (T), the AFSK
MARK/SPACE frequencies are NORmal at 2125 and 2295 HZ, respect
ively, and that each character will be transmitted as it is being typed
(CHAR), Type some Alpha-Numeric text and observe that the typed text
is displayed above the split-line and also below the split line. The text
which is displayed below the split-line represents the actual text as it is
transmitted. The text which is displayed above the line represents the
entries into the system’s text buffer.
Return the system to the receive mode with the RUN/STOP key by
itself or by typing ‘CTRL CLR/HOME’ (hold the ‘CTRL’ key and press
the key labled ‘CLR/HOME’). Observe that the top line display has
changed indicating that the system is in the Receive mode. Type in some
text and note that it is no longer displayed below the split line.
2.4 SPEED SELECTION COMMANDS:
NOTE: the right hand bracket ] is the symbol for a terminated command
sequence which required further keyboard input such as speed select or
memory store. When you first initiate these commands, you should not
see anything on the screen. If you see the ‘ ] ’ it means that particular
command has been terminated. Hitting‘CTRL X’ twice for example will
only terminate the command without it taking affect.
The operating speed (TTY and MORSE) is selected by means of the
‘CTRL X’ command. The allowable RTTY BAUDOT speeds are 60, 66,
75, 100, and 132 WPM. ASCII code speeds are 110 and 300 baud. For
MORSE, speeds from 5 to 149 WPM are permitted. To select an RTTY
(BAUDOT) speed of 66 WPM (SAME AS 50 BAUD), first type ‘CTRL B’
if not in BAUDOT already, then:
TYPE: CTRL X’ (SPEED SELECT COMMAND
NOTHING SHOWS ON THE
SCREEN)
TYPE: 66 (DESIRED SPEED)
TYPE: ‘CLR/HOME’ (OR ANY NON-NUMERIC KEY
PRINTS ])

Observe that the top line displays
R B 0 6 6 W P M N O R
To select an RTTY (BAUDOT) speed of 100 WPM (same as 75 baud),
TYPE: ‘CTRL X‘
TYPE: 100
TYPE: ‘CLR/HOME’
Observe the speed display on the top line is now 100 WPM.
To select an RTTY (ASCII) rate of 110 baud,
TYPE: ‘CTRL A’
System will automatically go to 110 BAUD when ASCII is selected,
Observe that the top line displays A-110 BD (BAUD) where the ‘A’ in
dicates that the selected code is ASCII.
To select an RTTY (ASCII) rate of 300 baud, (no need to type ‘CTRL
A’ since you are already in ASCII)
TYPE: ‘CTRL X’
TYPE: 300
TYPE: ‘CLR/HOME’
Note, if you are in 300 BAUD ASCII, to change to any other speed or
code, you must first go to 110 BAUD ASCII. The jump from 300 BAUD
ASCII to MORSE or BAUDOT directely is not allowed.
Go back to RTTY (BAUDOT) speed of 60 WPM (Same as 45 baud),
TYPE: ‘CTRL B’
TYPE: ‘CTRL X’
TYPE: 60
TYPE: ‘CLR/HOME’
(ASCII stands for American Standard Code for Information Inter
change, whereas ‘BAUDOT’, pronounced ‘BAW DOUGH’ is a man’s
name.)
NOTE, you can omit the ‘CLR/HOME’ key if you enter the speed with
three digits, 110, 066, 075 etc., since the program automatically ter
minates the command on the third digit.