Appendix I

DECwriter III (LA120) Programming Summary

The most current operating and programming information on the DECwriter III is reproduced here.

Set-Up

Key	Function/Comments
`CTRL` and `SET-UP`	Locks LA120 in set-up mode. SET-UP light flashes. To exit set-up mode press `SET-UP`
`SET-UP`	Places LA120 in set-up mode while `SET-UP` is held down. SET-UP light flashes. To exit set-up mode release `SET-UP`

Notes:

LA120 must be in set-up mode to set the following features.
Do not use SHIFT unless specified.

Forms

Key

Function/Comments

SHIFT

Display current line number.
Releasing SHIFT returns display to current column number

1

Set horizontal tab at current column

SHIFT and 1

Set vertical tab at current line

2

Clear horizontal tab at current column

SHIFT and 2

Clear vertical tab at current line

3

Clear all horizontal tabs

SHIFT and 3

Clear all vertical tabs

4 or SHIFT and 4

Establish top of form (TOF)

5

Set minimum column number (left margin)

SHIFT and 5

Set minimum line number (top margin)

6

Set maximum column number (right margin)

SHIFT and 6

Set maximum line number (bottom margin)

7

Clear left and right margins

SHIFT and 7

Clear top and bottom margins

F

Form Length

Note: Changing form length clears top and bottom margins and establishes TOF

Display
1 thru 168	Lines per form

H

Horizontal pitch (Characters per inch)

Note: Changing horizontal pitch clears left and right margins

Display	Pitch
5	5.00 cpi
6	6.00 cpi
7	6.60 cpi
8	8.25 cpi
10	10.00 cpi
12	12.00 cpi
13	13.20 cpi
16	16.50 cpi

V

Vertical pitch

Note: Changing vertical pitch clears top and bottom margins.

Display	Pitch
2	2 lpi
3	3 lpi
4	4 lpi
6	6 lpi
8	8 lpi
12	12 lpi

Operator Comfort

Key	Function/Comments
`G`	Bell volume 0 = Low Volume 1 = High Volume
`K`	Key click 0 = Off 1 = On
`R`	Auto repeat 0 = Off 1 = On
`Z`	Last character view 0 = Manual 1 = Auto

Communication

Key

Function/Comments

A

Auto answerback
0 = Off
1 = On

B

Buffer control
0 = Small
1 = Large

C

Printer character set
1 = United States
2 = United Kingdom

D

Auto disconnect
0 = Off
1 = On

E

Local echo
0 = Off
1 = On

J

Auto new line at right margin
0 = Off
1 = On

L

Auto line feed (Return key)
0 = Off
1 = On

M

Modem
1 = FDX, No Modem
2 = FDX, Modem
3 = HDX, Supervisory
4 = HDX, EOT
5 = HDX, ETX

N

Keyboard and printer character set
1 = United States
2 = United Kingdom

O (letter)

Alternate character set
0 = Off
1 = On

P

Parity and data bits

Display	Data Bits	Parity
Display	Data Bits	Rec	Xmt
1	7	Ignore	Mark
2	7	Ignore	Space
3	7	Ignore	Odd
4	7	Ignore	Even
5	7	Odd	Odd
6	7	Even	Even
7	7	None	None
8	8	None	None
9	8	Odd	Odd
10	8	Even	Even

Q

HDX initial calling state
0 = Transmit
1 = Receive

S

Secondary channel

Display	Fdx * Mode	Hdx * Rev. Ch.
0	Speed	No
1	Restraint	Yes

* See M Key, Modem

U

Break enabled
0 = No
1 = Yes

W

Printer new line character
1 = None
2 = Line feed (LF)
3 = Return (CR)

X

XON/XOFF
0 = No
1 = Yes

Y

Alternate keypad mode
0 = No
1 = Yes

Key

Function/Comments

0 (number)

Selects receive and transmit baud rates and number of stop bits

Baud Rate (Displayed)	Stop Bits
50	2
75	2
110	2
134	1
150	1
200	1
300	1
600	1
1200	1
1800	1
2400	1
4800	1
7200	1
9600	1

SHIFT and 0

Selects split baud rates:
0 selects receive baud rate; SHIFT and 0 then offers a choice of three transmit baud rates.

Receive Baud Rate (Not Displayed)	Transmit Baud Rate (Displayed)	Transmit Stop Bits
600	75	2
	150	1
	600	1
1200	75	2
	150	1
	1200	1
2400	300	1
	600	1
	2400	1
4800	300	1
	600	1
	4800	1

Store Recall and Status

Key	Function/Comments
`I` (letter)	Select factory set-up parameters
`8`	Print status message
`9`	Recall set-up parameters
`SHIFT` and `9`	Store set-up parameters

Self Test

Key	Function/Comments
`T`	Initiate printing self test
`SHIFT` and `>`	Initiate non-printing self-test Note: Type any character in set-up mode to stop self test.