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### 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.