NEW Lprint Backspacedoes not, Lprint Work | Star Micronics Delta

Special Features

65

Let’s analyze the program. Line 10 sets the line spacing to 7/72 of an inch so that the characters that we print will touch top to bot- tom. Lines 20-40 print 10 vertical line characters. Then line 60 sets one-direction printing and the vertical lines are printed again. Finally line 100 sends a form feed to advance the paper to the top of a new page, and then uses the master reset to restore Delta to the power-on condition.

Backspace and delete

Backspace (CHR$(8)) “backs up” the printhead so that you can print two characters right on top of each other. Each time Delta receives a backspace it moves the printhead one character to the left, instead of to the right. You can strike over multiple letters by sending more than one backspace code.

Delete (CHR$(127)) also “backs up” one character, but then it “erases” the previous character (it’s erased from Delta’s buffer, not from the paper).

The following program shows how these two codes work.

NEW

10 LPRINT "BACKSPACEDOES NOT";

20LPRINTCHR$(8)CHR$(8)CHR$(8);

30LPRINT 'I===WORK"

40LPRINT "DELETEDOES NOT";

50LPRINTCHR$(127)CHR$(127) CHR$(127);

60LPRINT "WORK"

Here is what this program will print:

EAC;t:::SF’ACE DOES WOV WORC:;

DELETE DOES WOKC,

The backspace codes in line 20 move the printhead a total of three spaces to the left so that the first part of line 30 will overprint the word “NOT”. The delete codes in line 50 “erase” the three letters in the word “NOT” so that it doesn’t even print.

The seven bit dilemma

Certain computers (most notably the Apple II) don’t have the capability to send eight bits on their parallel interface. They can only send seven bits. This would make it impossible for these

Image 77

Star Micronics Delta NEW Lprint Backspacedoes not, Lprint I===WORK Lprint Deletedoes not, Lprint Work, Seven bit dilemma

Contents

Delta User’s Manual @Copyright 1983 Star Micronics, Inc Special Message to the New Owner Delta User’s Manual Table of Contents Creating Your Own Characters Special Features Delta PrinterFormatting Your Output Getting It All Together Maintenance Appendix F Atari 400/800 Computers Appendix D TRS-60 ComputersAppendix E Osborne, Kaypro and CP/M Computers Appendix Character Style Charts Appendix DIP Switch SettingsAppendix Commodore VIC-20 Computers Appendix Warranty Inside Back Cover Command Quick Reference Consumer Response 309 DIP Switch Quick ReferenceDelta User’s Manual Serial busy protocols XONlXOFF Protocol ACK protocol Index Tables Xii Delta User’s Manual Closer Look Roll paper holder and holder shaft used only with roll Paper separator and paper guide used with roll paperPage Paper Selection and Loading Parallel interface connector the place where you hook Loading single sheets Delta User’s Manual Loading roll paper Delta User’s Manual Loading sprocket-feed paper Closer Look Open the tractor covers to expose the sprocket teeth Figure I-10.Delta ready to run with sprocket-feed paper Bottom feeding Delta-15 Delta User’s Manual Ribbon Installation Self-Test Closer Look Delta User’s Manual Getting Started With Delta Using Commercial Sojtware First, some terminology Getting Started With Delta Ascii Using Delta with word processors Using Delta with SuperCalcPage Getting Started With Delta Using this book without learning Basic Establishing communications ListOPEN4,4 CMD4 List PRINT#4 CLOSE4 NEW NEW Lprint Testing RUNNEW LPRINTCHR$7 RUN CHR$ function Escape Code NEW LPRINTCHR$27CHR$52 2$3LPRINT Testing RUN ESC$=CHR$27 l@ LPRINTESC$ Some problem codes Delta User’s Manual Chapter Printing Text With Delta @ Lprint this is Elite Pitch Printing Print pitch CommandsLprint Condensedis the Narrowestpitch Lprint NOW WE are Back to Pica Pitch Printing Expanded print LPRINTCHR$27W CHR$@NOW Were Back to NormalI s H153 LPRINTCHR$14EXPANDEDELITE Pitch Print CommandsLprint NOW WE are Back to Unexpandedpica Printing Making Delta print darker Lprint this is DOUBLE-STRIKEPRINTING Print EmDhasis a Commands Italic printing Italic Commands Superscripts and subscripts UnderJining Mixing modes Superscript Subscript commandsNEW Lprint Thisline Uses Build Instructionset Lprintelites Elite LPRINTPICA$ Pica LPRINTRESET.ALL$ Return LPRINTRESET.ALL$REGULAR.HEADING$= STRING$27,*+ Regular Return Repeatwith Italics Italics = False LPRINTROMAN$If Pica = False then LPRINTFOUR.DOT$ GOTO3590 If ENLARGED= True then Lprint Control Code Function Here is the chart it producesPage Delta User’s Manual Line Spacing and Forms Control Changing Line Spacing This is what you will get Run the program again. Now the results will look like this Line spacing Commands Moving down the page without a carriage return NEW Lprint Linenumber Form feed Forms Controls Changing the Page Length Form length commands Lprint PAY to the Order Top and bottom margin commands LineSpacingandFormsControl51 Control code Summary ESC Delta User’s Manual Formatting Your Output NEW Lprint ONECHR$9TWOCHR$9THREE CHR$9 Four Left and right margin commands One-shot tab command 13@ Lprint Return 5B END LPRINTCHR$27P CHR$l@ CHR$Z@CHR$@ Control Code Function One-shot vertical tab command Now hear this LChapter Initializing Delta Bell commands Putting Delta to sleep Some Miscellaneous commandsPrinting to the bottom of the sheet Unidirectional printing Printing Direction Lprint LprintNext Lprint I===WORK Lprint Deletedoes not NEW Lprint Backspacedoes notLprint Work Backspace and delete Eighth Bit controls Block graphics characters and special symbols 3pl Lprint I II=11CHR$ICHR$9 4pI Next I Lprint Next J Macro control code International Character set commandsInternational character sets Macro instruction Commands Macro Lprint CHR$18 Pica StartdefinitionOFF Regularprint END Macro Control code Function Bell Disable bell Enable bell Reset Off-lineOn-line Delta User’s Manual Creating Your Own Characters Dot Matrix Printing 000 0 eeeS&fee Rule I Download characters are seven dots high Defining Your Own Characters Rule 2 Dots cannot overlap Add up each column of dots 8WRONG Creating YourOwn Characters Assigning a value to your character Download character definition command Character designs for the four card suits Figure Y-10. The attribute byte n2 for our heart character Next M Printing Download Characters LPRINTCHR$27CHR$36CHR$@ DEFINTA-Z Next J Read X LPRINTCHR$XNext Lprint Return DECKCARD=X Next Card Return LPRINTSUIT$SUIT Proportkmal Characters Download Character dejfinition commands 12@ Lprint CHR$BITS 138 Next Only Difference Is the way They Are Accessed Creating Your Own Characters Lprint DEF.DOWN.CHAR$ NUMERAL.BOT$NUM= CHR$ASCII+ 2 + CHR$ASCII+ Mixing Print Modes with Download Characters Utility Program Gosub 950RETURN Gosub 660 Return REM **** Display Menu for Edit Mode Summary