AT
#define AT(t, p1, p2, s1, s2) at(m, t, p1, p2, s1, s2)
#define AT(t, p1, p2, s1, s2) /* nothing */
#define AT $28 /* (T) assembler scratch */
#define AT $at /* assembler temp */
# define AT(x) ((x) << 0)
enum { ATQ, ATRM, AT, BATCH, CAT }; /* what are we running as? */
#define AT(member) ataddr_string((ap->member[1]<<8)|ap->member[2],ap->member[3])