Star Micronics manual 0x 25 = o 0x 24 = o, Controlcodes

o x 27 = o

1 x 26 = 64

0x 25 = o

0x 24 = o

1 X 23 = 8

0x2’ = o

1x 21 = 2

0x 2° = Q

74Decimal

zone digits

0100 1010 Binary

4 A Hexadecimal

The ASCII table in the TechnicalSupplementshows all these equivalent ~presentationsfor the symbolsyour laser printer understands.The table organizesthemin ascendingorder.In fact,ASCIIis organizedin a waythat actuallymakessense.

Flip back therefor a quicklook rightnow. See how you can slicethe table into clumps of 16 or 32, based on what’s in the zone portion under the hexadecimalcolumn?These clumpsmake subgroupsof similarsymbols:

●hex 00 to IF are the commandsymbolscalledcontrolcodes,

●hex 20 to 40 are the commonkeyboardsymbolsand numerals,

●hex 41 to 60 are capitallettersand the less commonkeyboardsymbols,

●hex 61 to 7F are lowercaselettersand a few final symbols.

That takes care of the first 128 ASCII symbols. However,nearly every cofnputer and printer manufacturertreats the second half of the table differently. Hewlett-Packard,for example, puts a variety of accented foreignlanguagecharactemintopositions128-255(oftenreferredto as high ASCIZ).Epson gives you a choice of either italics characters or IBM charactergraphics.

1.2.3 Controlcodes

TheASCIItableshowssymbolslikeJor2 thewaytheyactuallyprinton the laser printer.But ASCIIincludesmorethanjust printablecharacters:none of the controlcode commandsat the beginningof the table actuallyprint. Instead, when your computersends a control code to the laser printer it makesyourprinterdo other things,such as soundits beeper.

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