BASCOM Errata 

Defining Arrays

An array is a set of sequentially indexed elements having the same type. Each element of an array has a unique index number that identifies it. Changes made to an element of an array do not affect the other elements.
The index must be a numeric constant, a byte, an integer , word or long. The maximum number of elements is 65535. The first element of an array is always one. This means that elements are 1-based.
Arrays can be used on each place where a 'normal' variable is expected.


The number of elements must be known during compile time.

Defining an array with 10 element

Dim A(10) As Byte   'correct
Const Cl = 10
Dim B(cl) As Byte 'correct
Dim Vl As Byte
vl = 10
Dim C(vl) As Byte 'not allowed

The book contains some not allowed array definitions (look to MEAN.BAS). With the used compiler version that definitions worked because no other definition of variables followed.
The actual compiler version detects an access to a variable defined in the third way!


Floating Point Numbers
Many thanks to Michael Kleineidam for his feedback.

S. 73 4.3 Variable

In the table long and single have the sam format. That's not correct.
BASCOM-AVR Help shows the correct formats and ranges.

Bit (1/8 byte). A bit can hold only the value 0 or 1. A group of 8 bits is called a byte.
Byte (1 byte).  Bytes are stores as unsigned 8-bit binary numbers ranging in value from 0 to 255.
Integer (two bytes). Integers are stored as signed sixteen-bit binary numbers ranging in value from -32,768 to +32,767.
Word (two bytes). Words are stored as unsigned sixteen-bit binary numbers ranging in value from 0 to 65535.
Long (four bytes). Longs are stored as signed 32-bit binary numbers ranging in value from -2147483648 to 2147483647.
Single. Singles are stored as signed 32 bit binary numbers. Ranging in value from 1.5 x 10^–45 to 3.4 x 10^38
Double. Doubles are stored as signed 64 bit binary numbers. Ranging in value from 5.0 x 10^–324 to 1.7 x 10^308
String (up to 254 bytes). Strings are stored as bytes and are terminated with a 0-byte. A string dimensioned with a length of 10 bytes will occupy 11 bytes.

S. 77 4.5 Gleitkommaarithmetik

There are some failures in the table below. For further explanations have a look into BASCOM-AVR help please.

Floating Point Number S E [hex] M [hex] 1.M [bin]
1.234 0 3F 9D F3 B6 1 .00111011111001110110110
12.34 0 41 45 70 A4 1 .10001010111000010100100
-12.34 1 C1 45 70 A4 1 .10001010111000010100100


Last change:2013-12-14