/ fxx -- data segment definition
eqvtab = xbuf+518. / for pass 2
blocks = xbuf / for pass 3
dattab = xbuf+518. / for pass 4
esymp: .=.+2 / init(esymtab)
namep: .=.+2 / init(namebuf)
symbuf: .=.+smblsize / init(<_>)
imptab: .=.+[26.*2*2] / 26 letters, 2 alphabets, 2 bytes