4 c: allow C-like strings
6 i: set the size of sets
7 n: no register messages
8 s: only compile standard pascal
10 u, U: allow underscores in variables
12 A: extra array bound checks
13 C: disinguish between upper- an lower-case
14 L: no FIL and LIN instructions
15 M: maximum identifier length
17 V: object sizes and alignments
21 l: run lexical analyzer only