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Epson SQ-850 User Manual - Page 143

Copying ROM characters to RAM, 28 Software and Graphics

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User-defined Characters Run the program to see the printout below: As you can see, both sets of characters (the original ROM characters that the printer normally uses and the user-defined character set) remain in the printer available for your use. The command to switch between the two sets is used in line 90 and 110. It is: ESC % n If n is equal to 0, the normal ROM character set is selected (this is the default). If n is equal to 1, the user-defined character set is selected. If you select the user-defined character set before you have defined any characters, the command is ignored and the ROM characters will still be in use. You may switch between character sets at any time - even in the middle of a line. To try it, place semicolons at the end of lines 80 and 100 in the program above. Copying ROM characters to RAM After running the program above, if you select the user-defined character set and try to print other characters, the only one that will print is the arrow. Since no other characters are in the printer's user-defined RAM area, nothing else prints. Other characters sent to the printer do not even print as spaces; it is as if they were not sent at all. In many cases, you may want to redefine only a few of the characters to suit your needs; the rest of the alphabet will work fine as it is. As you have seen, it is possible to switch back and forth at will between the normal character set and the user-defined character set. It is, however, rather inconvenient. 4-28 Software and Graphics

Section	Page
FRONT MATTER	1
CONTENTS	5
INTRODUCTION	10
CHAP 1-SETTING UP THE PRINTER	13
Ink Jet Precautions	14
Unpacking the Printer	15
Checking the parts	15
Removing the protective materials	16
Choosing a Place for the Printer	19
Assembling the Printer	21
Attaching the paper guide	21
Installing the ink cartridge	22
Testing the Printer	26
Connecting to a power supply	26
Charging the ink cartridge	28
Running the self test	31
Checking the operation	38
Connecting the Printer to Your Computer	40
The parallel interface	40
The serial interface	42
Setting Up Your Application Software	44
Choosing from a menu	44
CHAP 2-PAPER HANDLING	46
Choosing paper	47
Using Single Sheets	48
Loading a sheet	48
Reloading during printing	52
Using Continuous Paper	53
Positioning your continuous paper supply	53
Loading continuous paper	54
Switching between Continuous and Single Sheets	61
Switching to single sheets	61
Switching back to continuous paper	66
Printing on Special Paper	68
The paper thickness lever	68
Labels	70
Envelopes	73
CHAP 3-USING THE PRINTER	76
Operating the Control Panel	77
The display	77
The lights	78
The buttons	79
Other control panel features	84
SelecType Settings	85
SelecType	85
Using SelecType	85
Changing the SelecType settings	89
Initializing the settings	91
Page Length	93
Skip Over Perforation	94
Adjusting the Loading Position	96
The Loading Position	96
Adjusting the loading position	97
Short Tear-off	98
What happens in short tear-off mode	98
Adjusting the tear-off position	101
Selecting Typestyles	103
Character fonts	103
Character spacing	108
Selecting an International Character Set	110
Choosing a Character Table	111
Data Dump Mode	113
CHAP 4-SOFTWARE AND GRAPHICS	116
Enhancing Your Printing	117
Character spacing	117
Character size	118
Special effects and emphasis	119
Selecting typestyles with Master Select	122
Graphics	124
The print head	125
The graphics command	128
Column reservation numbers	129
A simple graphics program	130
Using hand-calculated data to print graphics	131
Individual graphics option commands	134
The reassigning command	135
User-defined Characters	136
Designing your characters	136
Defining your characters	138
Sending information to your printer	140
Printing user-defined characters	142
Copying ROM characters to RAM	143
Letter Quality characters	144
CHAP 5-USING PRINTER OPTIONS	148
The Cut Sheet Feeder	149
Installation	149
Paper handling	151
Testing the printer in the cut sheet feeder mode	155
Loading envelopes	157
Using the cut sheet feeder	160
Switching between the cut sheet feeder and continuous paper	162
Single sheet insertion	164
Removing the cut sheet feeder	166
The Pull Tractor	168
Installation	168
Paper handling	171
Removing the tractor	176
Interface Boards	178
Choosing an interface	178
Compatible interfaces	178
Installing the interface board	179
The #8143 new serial interface board	186
CHAP 6-MAINTENANCE	188
Cleaning the Printer	189
Cleaning the Print Head	191
Replacing the Ink Cartridge	193
Transporting the Printer	196
CHAP 7-TROUBLESHOOTING	199
Problems and Solutions	200
Power Supply	201
Printing	202
Paper Handling	211
Options	219
CHAP 8-TECHNICAL SPECIFICATIONS	226
Printer specifications	227
Printing	227
Paper	228
Mechanical	231
Electrical	233
Environment	233
Interface Specifications	235
Parallel Interface	235
Serial interface	238
Options Specifications	240
Cut sheet feeders	240
Initialization	243
Default settings	244
CHAP 9-COMMAND SUMMARY	245
Using the Command Summary	246
Control key chart	248
Commands in Numerical Order	249
Commands Arranged by Topic	252
Printer Operation ESC 63	252
MSB Control	255
Data Control	256
Vertical Motion	257
Horizontal Motion	263
Overall Printing Style	267
Print Size and Character Width	269
Print Enhancement	273
Word Processing	279
Character Tables	280
User-defined Characters	282
Graphics	284
APPENDIX	287
Proportional Width Table	288
Character Tables	292
GLOSSARY	294