Caple C871i Manual de usuario descargar pdf (Pagina 212)

100

101

Apple II Computer Info

screen.

3. Type in "370.03E9W 370.03E9W". [Teaching you to back up even

then.]

4. Start the tape recorder in record mode and depress the "RETURN" key.

5. When the program has been written to tape, the asterick and flashing

cursor will reappear.

The Program

After entering, checking and saving the program perform the following

procedure to get a feeling of how the program is used:

1. Bc (control B) into BASIC

2. Turn the teletype (printer on)

3. Type in the following

10 CALL 880

15 PRINT "ABCD...XYZ0l123456789"

20 PR#0

25 END

4. Type in RUN and hit the "RETURN" key. The text in line 15 should be

printed on the teletype and control is returned to the keyboard and Video

monitor.

Line 10 activates the teletype machine routine and all "PRINT"

statements following it will be printed to the teletype until a PR#0

statement is encountered. Then the text in line 15 will appear on the

teletype's output. Line 20 deactivates the printer and the program ends on

line 25.

Conclusion

With the circuits and machine language program described in this paper

the user may develop a relatively simple serial output interface to an

ASR-33 or RS-232 compatible printers. This circuit can be activated

through BASIC or monitor levels. And it is a valuable addition to any

users program library.

Ok. That's all of the text -- all that's left to reproduce is the machine

code and the two schematics. I'm debating whether or not to reproduce the

whole source with comments, or whether to just do a hex dump -- it'll

depend upon how ambitious I'm feeling. I'm not so slick with schematics so

we'll see how this turns out with only ASCII to work with. It'll be in the

next post.

Ivan Drucker

[email protected]

Lewis & Clark College, Portland OR

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Apple II Computer Technical Information : Apple II Family Hardware Info

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