General structure – Zilog EZ80F916 User Manual
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General Structure
Every nonblank line in an assembly source file is either a source line or a comment line.
The assembler ignores blank lines. Each line of input consists of ASCII characters termi-
nated by a carriage return. An input line cannot exceed 512 characters.
A backslash (\) at the end of a line is a line continuation. The following line is concate-
nated onto the end of the line with the backslash, as exemplified in the C programming
language. If you place a space or any other character after the backslash, the following line
is not treated as a continuation.
The following sections describe the general structure:
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“Case Sensitivity” on page 189
Source Line
A source line is composed of an optional label followed by an instruction or a directive. It
is possible for a source line to contain only a label field.
Comment Line
A semicolon (;) terminates the scanning action of the assembler. Any text following the
semicolon is treated as a comment. A semicolon that appears as the first character causes
the entire line to be treated as comment.
Label Field
A label must meet at least one of the following conditions:
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It must be followed by a colon.
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It must start at the beginning of the line with no preceding white space (start in column
1).
NOTE:
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Any instruction mnemonic (with no following operands) followed by a colon is
treated as a label.