ASIC: MS-DOS жүйесі үшін BASIC компиляторы

ASIC is a compiler and integrated development environment for a subset of the BASIC programming language. It was released for MS DOS and compatible systems as shareware. Written by Dave Visti of 80/20 Software, it was one of the few BASIC compilers legally available for download from BBSes. ASIC allows compiling to an EXE or COM file. A COM file for Hello world program is 360 bytes. and floating point arithmetic. These shortcomings resulted in the tongue in cheek motto, "ASIC: It's almost BASIC!"

ASIC is strongly impoverished in comparison with its contemporary BASICs. The features of ASIC are selected to make a program be easily and directly compiled into machine language. Thus, many language constructs of ASIC are equivalent to constructs of assembly language.

Neither indetifiers, nor keywords are case sensitive. Any DIM statements, if specified, must precede all other statements except REM statements or blank lines. All DATA statements must be placed at the beginning of the program, before all other statement types, except DIM, REM statements, or blank lines).

ASIC does not have the exponentiation operator ^. ASIC does not have boolean operators (AND, OR, NOT etc. ).

The size of array specified in the DIM statement must be a literal constant. A single DIM allows to declare only one array.

PRINT's arguments must be a literal or variable. PRINT does not allow to use combined expressions as its arguments, nor does it allow to use strings concatenated with ; or +. If a PRINT command ends with ; or ,, then the next PRINT command will resume in the position where this one left off, just as though its argument were appended to the argument of the current PRINT command. The PRINT statement prints integer values six characters wide. They are aligned to the right (no trailing spaces). LOCATE row, column Moves the text cursor to the position (column, row), where 0 ≤ column and 0 ≤ row. The position (0, 0) is the upper left corner.

PSET (row,column),color Turns on the pixel of the color color at position (column, row), where 0 ≤column and 0 ≤ row. The position (0, 0) is the upper left corner.

A boolean condition may be only a comparison of numbers or strings, but not a comparison of combined expressions. A literal cannot be the left operand of comparison (e. g. can be X = 2, not 2 = X).

In FOR, after TO there may be only a number literal or variable but not a combined expression. The STEP clause does not exist in ASIC.

In a GOTO statement, the label must be followed by a colon.

In a GOSUB statement, the label must be followed by a colon.