as: VAX-operands

1 
1 9.50.6 VAX Operands
1 -------------------
1 
1 The immediate character is '$' for Unix compatibility, not '#' as DEC
1 writes it.
1 
1    The indirect character is '*' for Unix compatibility, not '@' as DEC
1 writes it.
1 
1    The displacement sizing character is '`' (an accent grave) for Unix
1 compatibility, not '^' as DEC writes it.  The letter preceding '`' may
1 have either case.  'G' is not understood, but all other letters ('b i l
1 s w') are understood.
1 
1    Register names understood are 'r0 r1 r2 ... r15 ap fp sp pc'.  Upper
1 and lower case letters are equivalent.
1 
1    For instance
1      tstb *w`$4(r5)
1 
1    Any expression is permitted in an operand.  Operands are comma
1 separated.
1