ASIC programming language. 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.

ASIC has little or no support for logical operators, control structures, and floating-point arithmetic.  These shortcomings resulted in the tongue-in-cheek motto, "ASIC: It's almost BASIC!"

Features 
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.

Program elements 
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).

Expressions 
ASIC does not have the exponentiation operator ^.

ASIC does not have boolean operators (AND, OR, NOT etc.).

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

Input and Output 
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.

Graphics 
 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.

Control Structures 
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).

Decisions 
After THEN, there may be a sequence of statements delimited by ELSE or ENDIF. An example:
IF X < 0 THEN
  PRINT "Negative"
ELSE
  PRINT "Non-negative"
ENDIF
Contrary to other BASICs, statements cannot be put between THEN and the end of the line.

An if-statement can realize the conditional jump. In this case, after THEN there may be a label.

Looping 
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.

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

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

BAS2ASI 
This utility, serving to convert GW-BASIC programs to ASIC syntax, in the version 5.0 does not support some GW-BASIC features. Examples:

STEP in the for loop is not converted. The program
10 FOR i=10 TO 1 STEP -1 
20 PRINT i
30 NEXT i
is converted into
	REM 10 FOR i=10 TO 1 STEP -1 
	FOR I@ = 10 TO 1 
		ASIC0@ = -1 -1 
		I@ = I@ + ASIC0@ 
		
		REM 20 PRINT i
		PRINT I@ 
		
		REM 30 NEXT i		REM 30 NEXT i		3:  Syntax error 

The exponentiation operator ^ is not converted. The program
10 a=2
20 b=a^10
30 PRINT b
is converted into
	REM 10 a=2
L10: 
	A@ = 2 
	
	REM 20 b=a^10
	2:  Syntax error

	REM 30 PRINT b	REM 30 PRINT b	3:  Syntax error

References

External links

ASIC 5.00 + Libraries + Linker
 Category:ASIC Tasks implemented in ASIC on rosettacode.org

BASIC programming language family