RR

Delta User’s Manual

computers to use Delta’s block graphics characters and special symbols if Star’s engineers hadn’t thought of a solution. (All of these characters have ASCII codes greater than 127 which means that the eighth bit must be on to use them.) The solution lies in the three control codes given in the following table.

Table 6-4

 

 

Eighth

bit controls

 

 

Function

Control

code

 

Turn the eighth bit ON

(ESC)

“>”

 

Turn the eighth bit OFF

(ESC)

“=‘I

-.

Accept the ei hth bit

 

 

 

 

 

“as is” from ta e computer

(ESC)

“#I’

 

Block graphics characters and special symbols

Besides the upper and lower case letters and symbols that we are by now familiar with, Delta has a whole different set of charac- ters that are for special uses. These characters include block graphics characters for drawing forms and graphs, and special symbols for mathematical, engineering and professional uses. The following program will print out all of the graphics characters available.

NEW

 

10

FOR J = 160 TO 255 STEP 8

 

20

FOR I = J TO J + 7

-.

Figure 6-l.

Page 78
Image 78
Star Micronics Delta user manual Eighth Bit controls, Block graphics characters and special symbols