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