16th January 1992
Support Group Application Note
Number: 002
Issue: 1
Author:
Using the Olivetti
JP101 printer
Applicable
Hardware :
Electron
Related
Application
Notes:
BBC B
BBC B+
Master 128
Master Compact
Copyright © Acorn Computer
Every effort has been made to ensure that the information in this leaflet is true and correct at
the time of printing. However, the products described in this leaflet are subject to continuous
development and improvements and Acorn Computers Limited reserves the right to change
its specifications at any time. Acorn Computers Limited cannot accept liability for any loss
or damage arising from the use of any information or particulars in this leaflet. ACORN,
ECONET and ARCHIMEDES are trademarks of Acorn Computers Limited.
Support Group
Acorn Computers Limited
Acorn House
Vision Park
Histon
Cambridge
CB4 4AE
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Support Group Application Note No. 002, Issue 1
16th June 1992
4) Double Height Characters Off
VDU1, 27, 1, 37
This command turns off double height printing.
5) Underlining
VDU1, 27, 1, 42, 1, 48 (normal underlining)
VDU1, 27, 1, 42, 1, 49 (double underlining)
VDU1, 27, 1, 42, 1, 50 (dotted underlining)
These commands turn on the appropriate style of underlining, which remains in operation until cancelled.
6) Underlining Off
VDU1, 27, 1, 43
Turns underlining off.
7) Horizontal Character Spacing
VDU1, 27, 1, 60 (10 characters per inch)
VDU1, 27, 1, 61 (12 characters per inch)
VDU1, 27, 1, 62 (18 characters per inch)
These commands select the number of characters printed per inch horizontally. The default value on
power-up or general reset is 10 cpi.
8) Vertical Line Spacing
VDU1, 27, 1, 69 (6 lines per inch)
VDU1, 27, 1, 70 (8 lines per inch)
These commands set the number of line feeds per inch to the chosen value.
9) Variable Vertical Line Spacing
VDU1, 27, 1, 38, 1, n
Sets line spacing to a value between 1/12 inch and 9/12 inch, in increments of 1/12 inch. The value n is 48+
(the number of increments). For example, if the desired line spacing was 5/12 inch, then n would be (48+5)
= 53, and the complete command would be VDU1, 27, 1, 38, 1, 53.
10) General Reset
VDU1, 27, 1, 48
Clears the print buffer, the horizontal and vertical program settings, the pitch and line spacings, etc.
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Support Group Application Note No. 002, Issue 1
16th June 1992
11) Alternative National Character Sets
VDU1, 27, 1, 91, 1, 48, 1, 51, 1, 48 (German)
VDU1, 27, 1, 91, 1, 48, 1, 52, 1, 48 (Spanish)
VDU1, 27, 1, 91, 1, 48, 1, 53, 1, 48 (Danish)
VDU1, 27, 1, 91, 1, 48, 1, 54, 1, 48 (French)
VDU1, 27, 1, 91, 1, 48, 1, 55, 1, 48 (Italian)
VDU1, 27, 1, 91, 1, 48, 1, 56, 1, 48 (Swedish/Finnish)
VDU1, 27, 1, 91, 1, 48, 1, 57, 1, 48 (British)
VDU1, 27, 1, 91, 1, 48, 1, 58, 1, 48 (USA-ASCII)
VDU1, 27, 1, 91, 1, 48, 1, 59, 1, 48 (Norwegian)
Selects one of the alternative national character sets. The default is that set on the DIP switches on the
PCB. Details of the special characters are given in the printer manual on page 5.12.
12) Programmed Horizontal Tabulation
VDU1, 27, 1, 80
(Format Information)
VDU1, 27, 1, 90
This is a complicated command to use. The program below demonstrates the use of this command to print
numbers 0 to 100 in a field width of 60 characters at tab stops of 0, 10, 15, 40, 47 characters.
10 @%+0
Turn off screen formatting
20 VDU2
Turn on output to printer
30 VDU1, 27, 1, 80
40 PRINT"60;10;15;40;47";
Tell printer horizontal tabulation program starts here
Send format information, line width followed by positions of
tab stops
50 VDU1, 27, 1, 90
60 Z=0
Tell printer horizontal tabulation program stops here
70 REPEAT
80 PRINT Z;
90 VDU1, 9
100 Z=Z+1
For Z=0 to 100 print Z
Horizontal tab to next tab stop
110 UNTIL Z-101
120 VDU1, 12
130 VDU3
Page eject
Turn off output to printer
13) Horizontal Tab
VDU1, 9
Automatically inserts enough spaces as needed to reach the next horizontal tab stop as set by 12) above. If
no Horizontal Tabulation Program is set then one space is inserted.
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Support Group Application Note No. 002, Issue 1
16th June 1992
14) Programmed Vertical Tabulation
VDU1, 27, 1, 81
(format information)
VDU1, 27, 1, 90
This is the vertical version of 12) above. See 12) for more information. The following program
demonstrates printing as programmed vertical tab stops.
10 @%=0
20 VDU2
30 VDU1, 27, 1, 81'
40 PRINT"60;10;15;40;47";
50 VDU1, 27, 1, 90
60 Z=0
70 REPEAT
80 PRINT Z;
90 VDU1, 11
100 Z=Z+1
110 UNTIL Z=6
120 VDU1, 12
130 VDU3
15) Vertical Tab
VDU1,11
Prints contents of buffer up to tab code, then performs paper skip to next vertical tab stop as defined by a
Vertical Tabulation Program. If there is no vertical tab stop defined, then the printer performs one line feed.
16) Paper Skip
VDU1, 12
Performs paper feed to first print line of next page.
17) Relative Vertical Form Skip
VDU1, 27, 1, 73, 1, i, l, j, l, k (where i=48+x, j=48+y, k=48+z)
Performs a paper skip of xyz line feeds, where xyz is less than 255. For example to obtain 100 line feeds
use VDU1, 27, 1, 73, 1, 49, 1, 28, 1, 48
18) Line Feed
VDU1, 10
Performs a single line feed
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Support Group Application Note No. 002, Issue 1
16th June 1992
19) Carriage Return
VDU1, 13
Performs a single line feed
20) Audible Alarm
VDU1, 7
Activates audible alarm lasting about 300msec.
21) Clear Printer Buffer
VDU1, 127
Clears print buffer and resets print head. Does not affect tab programs etc.
22) Plotter Programming
Although it is possible to program graphics dump routines in BASIC the result would be very slow due to
the large amount of information that must be processed. Any routine of this type should therefore be
written in machine code. Such a "Printer Dump Routine" is available from Acorn for the JP101.
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