User manual

Assembler directives ST Assembler-Linker

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Table 72. STRING

Purpose Define a byte-level string.

Format STRING <exp or “string”>,[,<exp or “string”>...]

Description

This directive forces the byte(s) in its argument list into the object code at the current

address. The arguments may be composed of complex expressions, which may even

include external labels. If the argument was an expression and had a value greater

than 255 the lower 8 bits of the expression are used and no errors are generated.

String argument(s) must be surrounded by double-quotes: these are translated into

ASCII and processed byte by byte. It's generally used for defining data tables.

Synonymous BYTE and DC.B.

Example

STRING 1,2,3 ; generates 01,02,03

STRING “HELLO” ; generates 48,45,4C,4C,4F

STRING “HELLO”,0 ; generates 48,45,4C,4C,4F,00

See also DC.B, BYTE, WORD, LONG, DC.W, DC.L, FCS

Table 73. SUBTTL

Purpose Define a subtitle for listing heading.

Format SUBTTL “<Subtitle string>”

Description

This directive is related to the TITLE directive: its argument is used as a subtitle at the

beginning of each page on a listing. We recommend that individual subtitles are

generated for each module in a program, while the TITLE is defined once in the

include file called by all the modules. This directive does not generate assembly code

or data.

Example SUBTTL “A/D control routines”