.AT [-] string | #expression [,string | #expression [,...]]
The .AT directive converts ASCII strings and/or expressions to hexadecimal bytes. The last generated byte will have an inverted bit b7 to signal the end of the string. This can be used to signal the end of a character processing loop. Apart from this minor difference the .AT directive works exactly the same as the .AS directive.
In Version 3 of the SB-Assembler this directive will not perform a boundary sync.
The string parameter is a delimited string.
The expression should evaluate to a positive number that is less than 256.
The parameter can consist of more than one string and/or expression, which all should be separated from each other by commas.
All generated bytes except the last one will have bit b7=0 if the first character of the parameter is not a - sign, this is called positive ASCII. If the first character of the parameter is a - sign all generated bytes will have b7=1 except the last one, this is called negative ASCII.
The delimiters may not enclose an empty string. They should enclose at least one character.
0000-54 65 73 F4 .AT /Test/ 0004-D4 E5 F3 74 .AT -/Test/ 0008-0D 54 65 73 000C-74 0A 8D .AT #$0D,/Test/,#$0A,#$0D 000F-8D D4 E5 F3 0013-F4 8A 0D .AT -#$0D,/Test/,#$0A,#$0D 0016-54 65 73 74 001A-0D 54 65 73 001E-F4 .AT /Test/,#$0D,\Test\