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9.49.6 VAX Operands

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.

For instance

tstb *w`$4(r5)

Any expression is permitted in an operand. Operands are comma separated.