Purpose: Select a numeric file for direct read and write access by the MEMORY function.
Format: OPEN filename type
Notes: The OPEN
statement opens a disk file to be accessed by memory READ
and WRITE functions. If filename
does not already exist then the file is created. The type
parameter indicates the data type format to be used by subsequent
READ or WRITE statements. Any combination
of data types may be used within a file provided that an OPEN
statement with the appropriate type is executed prior to the next
memory READ or WRITE statement.
The following table lists the available data types.
|flt||32 bit floating point|
|int||16 bit integer|
|byt||8 bit byte|
|swab||16 bit integer (big endian)|
The big endian format is a 16 bit signed integer file type. Each value is stored as 2 consecutive bytes with the MSB stored first, followed by the LSB. This is sometimes referred to as the Motorola format. Bytes are swapped when read into memory to conform to the little endian (or Intel) format. This format is only valid with the READ statement.
See Also: MEMORY