Holtek HT-IDE, User Manual

Page: 117 / 258

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Description
The #asm and #endasm are the inline assembly preprocessor directives.
The #asm directive inserts Holtek’s assembly instruction(s) after this
directive (or within the directive #asm and directive #endasm) into the
output file directly.
•
Example
#asm // convert low nibble value in the accumulator to ASCII
and a, 0fh
sub a, 09h
sz c
add a, 40h-30h-9
add a, 30h+9
#endasm
→
#line
•
Syntax
#line
constant ["filename"]
•
Description
The #line directive sets the predefined macro __LINE__, for the purpose
of error diagnostics or symbolic debugging, such that the line number of
the next source line is considered to be the given constant, which must be
a decimal number. If the filename is given, __FILE__ is set to the file
named. If filename is absent the remembered file name is not changed.
•
Example
#line 20 "ht48c10.asm"
→
Machine dependence : #pragma
•
Syntax
#pragma
Token-String
#pragma
vector Symbol @ Address
•
Description
The #pragma directive causes machine-dependent behavior when the
Token-String is of a form recognized by the C compiler. The #pragma
directive must end with a semicolon. An unrecognized pragma will be
ignored. The vector is a valid pragma which sets up the location, Address,
of an interrupt vector and assigns Symbol as the name of the vector. If a
function of name Symbol is defined, that function executes when the
corresponding interrupt occurs.
Chapter 9 Holtek C Language
107