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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Usually the left-arrow key cannot be used to move the cursor into the leftmost column: They may be used in either immediate or deferred execution. The easiest way to convert statements like this one is to rewrite them as follows: For pure probramming, without erasing or copying, see the escape commands. HGR 2 Sets full-screen high-resolution graphics mode by If a return is encountered before referencf the var’s have been assigned responses, two question marks are printed to indicate that an additional response is expected.
Another way to look probramming WAIT: PEEK 37 Returns the contents, in decimalof the byte at the specified decimal address 37 in the example. The screen is cleared to black, and page 1 of memory is displayed.
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. Similarly, a response assigned to a string variable must be a single string or literal, not a string expression.
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Thus, if Che left margin was set by POKE 32,5 then the leftmost character in the window is at the 6th printing-position from the left edge of the screen and if PEEK 36 returned a value of 5 then the ,anual was at the 11th printing-position from the left edge of the screen and at the 6th printing position from the left margin of the text window. Each bit in the binary equivalent of the decimal second argument Indicates whether you’re Interested in the corresponding bit in the memory location: For this example, we’ll use hexadecimal address IDFC.
The right-arrow key moves the cursor to the right; as it does, each character it crosses on the screen is entered as though you had typed it. One of the functions of progtamming prompt character, besides PROMPTing you for input to the computer, is to identify at a glance which language the computer is programmed to respond to at that time.
F7FF F8 3 3.
Applesoft BASIC Reference
If FOR loops are nested more than 10 levels deep, the ‘. The word “syntax” refers to the structure of a computer command, the order and correct form of the command’s various parts. Integer applesof variables use only 2 bytes for each array element.
Remember, X and Y must each be a number in the range through We’ve added a space betvreen some lines to make the program easier to read. The arithmetic expressions which form the parameters of the FOR loop may be reals, real variables, Integers, or integer variables. The prompt and cursor are moved to the last line of the screen. Either strings or literals may be used, or both. It sounds confusing at first, because the leftmost position is position zero, not 1.
Full text of “Applesoft BASIC Programming Reference Manual – Apple Computer”
High-resolution graphics display page 2. If numeric Input which is not a real, an integer, a comma or a colon, the message? String array variables use 3 bytes for each array element: That is why the cursor frequently cannot be moved to column of the TV screen by using the left-arrow key: Spaces before the first character and following a string are always ignored.
This is done by pulling up on the cover at the rear edge the edge farthest from the keyboard until the two corner fasteners pop apart. TEXT Sets the screen to the usual non-graphics text mode, with 40 characters per line and 24 lines. This Is useful in long programs, in which the computer checks to see if the user wants to interrupt with new data without stopping program execution.
Applesoft BASIC Programming Reference Manual – Apple Computer
Because of these limitations, manial is recommended that serious programmers GET numbers using GET svar and convert the resulting string to a number using the VAL function. Lines and search the string for a decimal point.
Additional reference material not covered in the chapters can be found in the appendices. It causes a character to be repeated as long as both the character’s key and the REPT key are held down.
DATA elements may be any mixture of reals, integers, strings janual literals. Simple switching actions are usually address dependent: NEXT One advantage of computers is their ability to perform repetitive tasks. They do not use parameters, and they do not affect the display of characters as you type them t nto the computer nor characters already on the screen. If expr is an arithmetic expression involving string expressions and string logical operators, expr is programmijg by comparing the alphabetic ranking of the string expressions as determined by the Refeernce codes for the characters involved see Appendix K.
Because of rounding errors and other unpredictablesinternal raath routines such as square root, divide, and exponent do not always give the exact number that you expected.