Epson FX-100 User Manual download pdf (Page 174)

80 LPRINT CHR$(27)"@": END

DATA 8,28,62,93,-6,28,93,62,28,8

100 READ R: FOR J=1 TO -N

110 LPRINT CHR$(R);: NEXT J

120

X=X-N-1: GOT0 70

RUN it again. Same arrow pattern, right? And with less data. The

number of repetitions (6) is entered into the DATA line as a negative

number that is followed by the pattern (28) to be repeated. Yet even

with this short cut, graphics designs do require that you plan and enter

lots of data. In the next few chapters, we’ll show you more ways to

take advantage of design patterns to reduce the amount of data

needed.

Summary

We began this chapter by adding up pin labels and using the total to

fire four graphics pins at one time. We changed that program to show

that the Reset Code does not affect either graphics commands or data.

And we commented on problems that may arise from software inter-

facing when you try to send codes that represent added-up pin labels.

After this general discussion, we introduced two new graphics den-

sities that have specific commands. You can print Double-Density at

one of two speeds: 160 cps (High) and 80 cps (Low). The second of

these modes, Quadruple Density, prints only at Low.

We then introduced a new single command with which you can

access any one of the seven FX graphics modes; Table 11-1 summarizes

them.

Here are the commands that we introduced in this chapter:

CHR$(27)”*“CHR$(m)CHR$(n

)CHR$(n

)

Enters Variable-Density Graphics Mode and

specifies a mode and the width setting, where

m is mode 0 - 6. Width = n

+(256*n

where n

is 0 - 255 and n

is 0 - 7

CHRS(27)“Y“CHR$(n

)CHR$(n

)

Enters High-Speed Double-Density Graphics

Mode and specifies the width setting. Width

= n

+ (256*n

), where n

is 0 - 255 and n

0-7

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