Chapter 8 Writing Source Statements144 Reserved Words8.8 Reserved WordsThe assembler gives special meanings to the symbols listed below, so they cannot be used for otherpurposes. These symbols are called reserved words.Either all upper-case or all lower-case letters may be used to code reserved words, but they cannot bemixed within one reserved word.• Machine language instruction mnemonics• Port names• Register names• Address constants• Directives• Assembler control instructions• Macro control instructionsExcept for machine language instruction mnemonics and port names, the reserved words are listedbelow.Register name d0, d1, d2, d3, a0, a1,a2, a3, PSW, mdr, spAddress constants aDirectives align, dc, ds, dw, end, equ, global, listoff,liston, xlistoff, xliston, notation, org, opt,page, radix, section, tit, funcinfo, assignAssembler controlinstructionsdefine, if, ifb, ifdef, ifeq, ifge, ifgt, ifle,iflt, ifn, ifnb, ifndef, ifneq, include, undefMacro controlinstructionsendm, exitm, irp, irpc, local, macro, purg, rept
