NOVA/nova_lp.c

   1 /* nova_lp.c: NOVA line printer simulator
   2
   3    Copyright (c) 1993-2008, Robert M. Supnik
   4
   5    Permission is hereby granted, free of charge, to any person obtaining a
   6    copy of this software and associated documentation files (the "Software"),
   7    to deal in the Software without restriction, including without limitation
   8    the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9    and/or sell copies of the Software, and to permit persons to whom the
  10    Software is furnished to do so, subject to the following conditions:
  11
  12    The above copyright notice and this permission notice shall be included in
  13    all copies or substantial portions of the Software.
  14
  15    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18    ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  19    IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  20    CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21
  22    Except as contained in this notice, the name of Robert M Supnik shall not be
  23    used in advertising or otherwise to promote the sale, use or other dealings
  24    in this Software without prior written authorization from Robert M Supnik.
  25
  26    lpt          line printer
  27
  28    04-Jul-07    BKR     DEV_SET/CLR macros now used,
  29                         <FF>, <CR>, <LF> output character delay now contingent upon non-zero TIME value,
  30                         LPT can now be DISABLED
  31    19-Jan-07    RMS     Added UNIT_TEXT
  32    25-Apr-03    RMS     Revised for extended file support
  33    30-May-02    RMS     Widened POS to 32b
  34
  35
  36 Notes:
  37     - data currently masked to 7 bits.
  38     - if register TIME is non-zero, then delay TIME events if <FF>, <CR> or <LF> seen
  39     - register POS show the current file position
  40     - register STOP_IOE determines return value issued if output to unattached LPT is attempted
  41 */
  42
  43 #include "nova_defs.h"
  44
  45 extern int32 int_req, dev_busy, dev_done, dev_disable;
  46
  47
  48 int32 lpt_stopioe = 0;                                  /* stop on error flag */
  49
  50 int32 lpt (int32 pulse, int32 code, int32 AC);
  51 t_stat lpt_svc (UNIT *uptr);
  52 t_stat lpt_reset (DEVICE *dptr);
  53
  54 /* LPT data structures
  55
  56    lpt_dev      LPT device descriptor
  57    lpt_unit     LPT unit descriptor
  58    lpt_reg      LPT register list
  59 */
  60
  61 DIB lpt_dib = { DEV_LPT, INT_LPT, PI_LPT, &lpt };
  62
  63 UNIT lpt_unit = {    /* 2007-May-30, bkr */
  64     UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_TEXT, 0), SERIAL_OUT_WAIT
  65     };
  66
  67 REG lpt_reg[] = {
  68     { ORDATA (BUF, lpt_unit.buf, 8) },
  69     { FLDATA (BUSY, dev_busy, INT_V_LPT) },
  70     { FLDATA (DONE, dev_done, INT_V_LPT) },
  71     { FLDATA (DISABLE, dev_disable, INT_V_LPT) },
  72     { FLDATA (INT, int_req, INT_V_LPT) },
  73     { DRDATA (POS, lpt_unit.pos, T_ADDR_W), PV_LEFT },
  74     { DRDATA (TIME, lpt_unit.wait, 24), PV_LEFT },
  75     { FLDATA (STOP_IOE, lpt_stopioe, 0) },
  76     { NULL }
  77     };
  78
  79 DEVICE lpt_dev = {
  80     "LPT", &lpt_unit, lpt_reg, NULL,
  81     1, 10, 31, 1, 8, 8,
  82     NULL, NULL, &lpt_reset,
  83     NULL, NULL, NULL,
  84     &lpt_dib, DEV_DISABLE
  85     };
  86
  87
  88 /* IOT routine */
  89
  90 int32 lpt (int32 pulse, int32 code, int32 AC)
  91 {
  92 if (code == ioDOA)
  93     lpt_unit.buf = AC & 0177 ;
  94
  95 switch (pulse)
  96     {                                                   /* decode IR<8:9> */
  97   case iopS:                                            /* start */
  98     DEV_SET_BUSY( INT_LPT ) ;
  99     DEV_CLR_DONE( INT_LPT ) ;
 100     DEV_UPDATE_INTR ;
 101     if ( lpt_unit.wait )
 102        if (  (lpt_unit.buf == 015)
 103           || (lpt_unit.buf == 014)
 104           || (lpt_unit.buf == 012)
 105           )
 106         {
 107         sim_activate (&lpt_unit, lpt_unit.wait);
 108         break ;
 109         }
 110     return (lpt_svc (&lpt_unit) << IOT_V_REASON);
 111     break;
 112
 113   case iopC:                                            /* clear */
 114     DEV_CLR_BUSY( INT_LPT ) ;
 115     DEV_CLR_DONE( INT_LPT ) ;
 116     DEV_UPDATE_INTR ;
 117     sim_cancel (&lpt_unit);                             /* deactivate unit */
 118     break;
 119     }                                                   /* end switch */
 120
 121 return 0;
 122 }
 123
 124
 125 /* Unit service */
 126
 127 t_stat lpt_svc (UNIT *uptr)
 128 {
 129 DEV_CLR_BUSY( INT_LPT ) ;
 130 DEV_SET_DONE( INT_LPT ) ;
 131 DEV_UPDATE_INTR ;
 132 if ((lpt_unit.flags & UNIT_ATT) == 0)                   /* attached? */
 133     return IORETURN (lpt_stopioe, SCPE_UNATT);
 134 fputc (uptr->buf, uptr->fileref);
 135 uptr->pos = ftell (uptr->fileref);
 136 if (ferror (uptr->fileref)) {
 137     perror ("LPT I/O error");
 138     clearerr (uptr->fileref);
 139     return SCPE_IOERR;
 140     }
 141 return SCPE_OK;
 142 }
 143
 144
 145 /* Reset routine */
 146
 147 t_stat lpt_reset (DEVICE *dptr)
 148 {
 149 lpt_unit.buf = 0;                                       /* (not DG compatible) */
 150 DEV_CLR_BUSY( INT_LPT ) ;
 151 DEV_CLR_DONE( INT_LPT ) ;
 152 DEV_UPDATE_INTR ;
 153 sim_cancel (&lpt_unit);                                 /* deactivate unit */
 154 return SCPE_OK;
 155 }