+-----------------+
                   |     T.CNFG      |
                   +-----------------+
                   |     T.CNF2      |
                   +--------+--------+
                   | T.FCNT | T.TFIL |
                   +--------+--------+
                   |     T.WID       |
                   +--------+--------+
                   | T.LPOS | T.OCHR |
                   +--------+--------+
                   |     T.OWNR      |
                   +-----------------+
                   |     T.STAT      |
                   +-----------------+
                   |     T.CSR       |
                   +-----------------+
                   |     T.VEC       |
                   +-----------------+
                   |     T.PRI       |
                   +--------+--------+
                   | T.PUN  | T.JOB  |
                   +--------+--------+
                   | T.PTTI | T.NFIL |
                   +--------+--------+
                   | T.TNFL | T.TCTF |
                   +--------+--------+
                   |     T.TID       |
                   +-----------------+
                   |                 |
                   +-----------------+
                   |     T.TTLC      |
                   +-----------------+

                   +-----------------+
                   |     T.IRNG      |
                   +-----------------+
                   |     T.IPUT      |
                   +-----------------+
                   |     T.ICTR      |
                   +-----------------+
                   |     T.IGET      |
                   +-----------------+
                   |     T.ITOP      |
                   +-----------------+
                  *|   input ring    |
                   | (default size = |
                   |    134 bytes)   |
                   +-----------------+
                  *|     T.OPUT      |
                   +--------+--------+
                  *|        | T.OCTR |
                   +--------+--------+
                  *|     T.OGET      |
                   +-----------------+
                  *|     T.OTOP      |
                   +-----------------+
                  *|   output ring   |
                   | (default size = |
                   |     40 bytes)   |
                   +-----------------+
                  *|     T.RTRY      |
                   +-----------------+
                  *|     T.TBLK      |
                   |    (7 words)    |
                   +-----------------+
                  *|     T.AST       |
                   | (2 words when   |
                   |   mapped mon.)  |
                   +--------+--------+
                  *| T.XCNT | T.XFLG |
                   +--------+--------+
                  *|     T.XPRE      |
                   +-----------------+
                  *|     T.XBUF      |
                   |    (3 words)    |
                   +-----------------+
                  *|     T.CNT       |
                   +-----------------+