APPLESOFT BASIC PROGRAMMING REFERENCE MANUAL PDF

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APPLESOFT II BASIC is APPLE’s very much extended BASIC language. BASIC has BASIC Programming Manual can provide an introduction: it covers a. Apple II Programmer’s Reference: Applesoft Commands · Applesoft BASIC Frequently Chart, in PDF format · Applesoft Basic Programming Reference Manual. Download as PDF, TXT or read online from Scribd. Flag for inappropriate content. Save. Applesoft ][ Basic Programming Reference Manual. For Later. save.

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Do not continue to lift the rear edge, but slide the cover backward until it comes free. Has no effect on text page 2 or on high-resolution graphics.

PR returns output to the TV screen. This color is black, the same color as the background, so the “old” yellow square seems to be erased. If text Is shown with this page, it comes from text page 2. In this mode, you are plotting points on a grid that is x-positions wide by y-positions high.

We can improve the program tremendously by using the IF statement just introduced, as follows: It will continue to ask until an Integer value is typed in. POKEresets the error-detection flag so that normal programminv messages will be printed. An alphanumeric character is any letter from A through Z, or any digit from through 9.

This is best illustrated by examples: All other characters in programs use one byte of program storage each. An increment of 10 between line numbers is generally sufficient.

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Applesoft BASIC Programming Reference Manual – Apple Computer

This serves mainly as an aid to the programmer, and serves no useful function as far as the operation of the program in solving a particular problem. The leading S is the sign of the number, nothing for a positive number and a minus sign – for a negative number. Consider the following program: Finally, there is one easy instruction for all plotting in high-resolution graphics. This would set the variable B to -1 if C equaled 0.

Very often, it is desirable to extract only the Nth character from a applesofft. A different random sequence is initialized by each different negative argument. Ctrl C is treated as any other character if it is not the first character typed.

Applesoft BASIC Reference

So far we have just used one type — real precision. This will also result in a speed improvement. ComiXology Thousands of Digital Comics. Other functions are described in sections dealing with similar instructions. To be sure, a thicker manual looks more formidable, but when you need the Information, you will be glad that we took the time and space to put it in. Sometimes this Is easier than assigning the last random number to a variable in order to save it.

When an error occurs in an immediate-execution statement, no line number Is printed.

If the left margin of the window was set at 6 POKE 32,6 and you wanted to provide a character three positions from left edge of the screen, then the window’s left margin must be changed prior to PRINTlng.

All arrays are stored with the right-most index ascending slowest; e. Each time the cursor moves to the left, one character is erased from the program line which you are currently typingregardless of what the cursor is moving over. In order of instruction line number, each DATA statement adds its elements to the list of elements built up by the programs’s previous lower line number DATA statements.

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The following program is incorrect; RUN it and see what happens.

Their usual meanings are ignored. Examples 2, 3 and 4 behave the same, despite the different wordings. This operation or sequence of the ESC key and then another key is written as “escape A”.

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Full text of “Applesoft BASIC Programming Reference Manual – Apple Computer”

When you are sure it is correct, RUN the program. An attempt to use the Teference function on Ctrl results in the? Please try again later.

The command POKE ,0 converts any full-screen graphics mode to mixed graphics-plus-text mode. That is why the cursor frequently cannot be moved to column of the TV screen by using the left-arrow key: A routine to limit the number of digits after the decimal point is given in the next section in this chapter.

Provides an easy way to erase: No prompt is given: When a number is converted to an integer.