| 1 | /* pdp8_lp.c: PDP-8 line printer simulator\r |
| 2 | \r |
| 3 | Copyright (c) 1993-2007, Robert M Supnik\r |
| 4 | \r |
| 5 | Permission is hereby granted, free of charge, to any person obtaining a\r |
| 6 | copy of this software and associated documentation files (the "Software"),\r |
| 7 | to deal in the Software without restriction, including without limitation\r |
| 8 | the rights to use, copy, modify, merge, publish, distribute, sublicense,\r |
| 9 | and/or sell copies of the Software, and to permit persons to whom the\r |
| 10 | Software is furnished to do so, subject to the following conditions:\r |
| 11 | \r |
| 12 | The above copyright notice and this permission notice shall be included in\r |
| 13 | all copies or substantial portions of the Software.\r |
| 14 | \r |
| 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r |
| 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r |
| 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\r |
| 18 | ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r |
| 19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r |
| 20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r |
| 21 | \r |
| 22 | Except as contained in this notice, the name of Robert M Supnik shall not be\r |
| 23 | used in advertising or otherwise to promote the sale, use or other dealings\r |
| 24 | in this Software without prior written authorization from Robert M Supnik.\r |
| 25 | \r |
| 26 | lpt LP8E line printer\r |
| 27 | \r |
| 28 | 19-Jan-07 RMS Added UNIT_TEXT\r |
| 29 | 25-Apr-03 RMS Revised for extended file support\r |
| 30 | 04-Oct-02 RMS Added DIB, enable/disable, device number support\r |
| 31 | 30-May-02 RMS Widened POS to 32b\r |
| 32 | */\r |
| 33 | \r |
| 34 | #include "pdp8_defs.h"\r |
| 35 | \r |
| 36 | extern int32 int_req, int_enable, dev_done, stop_inst;\r |
| 37 | \r |
| 38 | int32 lpt_err = 0; /* error flag */\r |
| 39 | int32 lpt_stopioe = 0; /* stop on error */\r |
| 40 | \r |
| 41 | DEVICE lpt_dev;\r |
| 42 | int32 lpt (int32 IR, int32 AC);\r |
| 43 | t_stat lpt_svc (UNIT *uptr);\r |
| 44 | t_stat lpt_reset (DEVICE *dptr);\r |
| 45 | t_stat lpt_attach (UNIT *uptr, char *cptr);\r |
| 46 | t_stat lpt_detach (UNIT *uptr);\r |
| 47 | \r |
| 48 | /* LPT data structures\r |
| 49 | \r |
| 50 | lpt_dev LPT device descriptor\r |
| 51 | lpt_unit LPT unit descriptor\r |
| 52 | lpt_reg LPT register list\r |
| 53 | */\r |
| 54 | \r |
| 55 | DIB lpt_dib = { DEV_LPT, 1, { &lpt } };\r |
| 56 | \r |
| 57 | UNIT lpt_unit = {\r |
| 58 | UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_TEXT, 0), SERIAL_OUT_WAIT\r |
| 59 | };\r |
| 60 | \r |
| 61 | REG lpt_reg[] = {\r |
| 62 | { ORDATA (BUF, lpt_unit.buf, 8) },\r |
| 63 | { FLDATA (ERR, lpt_err, 0) },\r |
| 64 | { FLDATA (DONE, dev_done, INT_V_LPT) },\r |
| 65 | { FLDATA (ENABLE, int_enable, INT_V_LPT) },\r |
| 66 | { FLDATA (INT, int_req, INT_V_LPT) },\r |
| 67 | { DRDATA (POS, lpt_unit.pos, T_ADDR_W), PV_LEFT },\r |
| 68 | { DRDATA (TIME, lpt_unit.wait, 24), PV_LEFT },\r |
| 69 | { FLDATA (STOP_IOE, lpt_stopioe, 0) },\r |
| 70 | { ORDATA (DEVNUM, lpt_dib.dev, 6), REG_HRO },\r |
| 71 | { NULL }\r |
| 72 | };\r |
| 73 | \r |
| 74 | MTAB lpt_mod[] = {\r |
| 75 | { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO",\r |
| 76 | &set_dev, &show_dev, NULL },\r |
| 77 | { 0 }\r |
| 78 | };\r |
| 79 | \r |
| 80 | DEVICE lpt_dev = {\r |
| 81 | "LPT", &lpt_unit, lpt_reg, lpt_mod,\r |
| 82 | 1, 10, 31, 1, 8, 8,\r |
| 83 | NULL, NULL, &lpt_reset,\r |
| 84 | NULL, &lpt_attach, &lpt_detach,\r |
| 85 | &lpt_dib, DEV_DISABLE\r |
| 86 | };\r |
| 87 | \r |
| 88 | /* IOT routine */\r |
| 89 | \r |
| 90 | int32 lpt (int32 IR, int32 AC)\r |
| 91 | {\r |
| 92 | switch (IR & 07) { /* decode IR<9:11> */\r |
| 93 | \r |
| 94 | case 1: /* PSKF */\r |
| 95 | return (dev_done & INT_LPT)? IOT_SKP + AC: AC;\r |
| 96 | \r |
| 97 | case 2: /* PCLF */\r |
| 98 | dev_done = dev_done & ~INT_LPT; /* clear flag */\r |
| 99 | int_req = int_req & ~INT_LPT; /* clear int req */\r |
| 100 | return AC;\r |
| 101 | \r |
| 102 | case 3: /* PSKE */\r |
| 103 | return (lpt_err)? IOT_SKP + AC: AC;\r |
| 104 | \r |
| 105 | case 6: /* PCLF!PSTB */\r |
| 106 | dev_done = dev_done & ~INT_LPT; /* clear flag */\r |
| 107 | int_req = int_req & ~INT_LPT; /* clear int req */\r |
| 108 | \r |
| 109 | case 4: /* PSTB */\r |
| 110 | lpt_unit.buf = AC & 0177; /* load buffer */\r |
| 111 | if ((lpt_unit.buf == 015) || (lpt_unit.buf == 014) ||\r |
| 112 | (lpt_unit.buf == 012)) {\r |
| 113 | sim_activate (&lpt_unit, lpt_unit.wait);\r |
| 114 | return AC;\r |
| 115 | }\r |
| 116 | return (lpt_svc (&lpt_unit) << IOT_V_REASON) + AC;\r |
| 117 | \r |
| 118 | case 5: /* PSIE */\r |
| 119 | int_enable = int_enable | INT_LPT; /* set enable */\r |
| 120 | int_req = INT_UPDATE; /* update interrupts */\r |
| 121 | return AC;\r |
| 122 | \r |
| 123 | case 7: /* PCIE */\r |
| 124 | int_enable = int_enable & ~INT_LPT; /* clear enable */\r |
| 125 | int_req = int_req & ~INT_LPT; /* clear int req */\r |
| 126 | return AC;\r |
| 127 | \r |
| 128 | default:\r |
| 129 | return (stop_inst << IOT_V_REASON) + AC;\r |
| 130 | } /* end switch */\r |
| 131 | }\r |
| 132 | \r |
| 133 | /* Unit service */\r |
| 134 | \r |
| 135 | t_stat lpt_svc (UNIT *uptr)\r |
| 136 | {\r |
| 137 | dev_done = dev_done | INT_LPT; /* set done */\r |
| 138 | int_req = INT_UPDATE; /* update interrupts */\r |
| 139 | if ((uptr->flags & UNIT_ATT) == 0) {\r |
| 140 | lpt_err = 1;\r |
| 141 | return IORETURN (lpt_stopioe, SCPE_UNATT);\r |
| 142 | }\r |
| 143 | fputc (uptr->buf, uptr->fileref); /* print char */\r |
| 144 | uptr->pos = ftell (uptr->fileref);\r |
| 145 | if (ferror (uptr->fileref)) { /* error? */\r |
| 146 | perror ("LPT I/O error");\r |
| 147 | clearerr (uptr->fileref);\r |
| 148 | return SCPE_IOERR;\r |
| 149 | }\r |
| 150 | return SCPE_OK;\r |
| 151 | }\r |
| 152 | \r |
| 153 | /* Reset routine */\r |
| 154 | \r |
| 155 | t_stat lpt_reset (DEVICE *dptr)\r |
| 156 | {\r |
| 157 | lpt_unit.buf = 0;\r |
| 158 | dev_done = dev_done & ~INT_LPT; /* clear done, int */\r |
| 159 | int_req = int_req & ~INT_LPT;\r |
| 160 | int_enable = int_enable | INT_LPT; /* set enable */\r |
| 161 | lpt_err = (lpt_unit.flags & UNIT_ATT) == 0;\r |
| 162 | sim_cancel (&lpt_unit); /* deactivate unit */\r |
| 163 | return SCPE_OK;\r |
| 164 | }\r |
| 165 | \r |
| 166 | /* Attach routine */\r |
| 167 | \r |
| 168 | t_stat lpt_attach (UNIT *uptr, char *cptr)\r |
| 169 | {\r |
| 170 | t_stat reason;\r |
| 171 | \r |
| 172 | reason = attach_unit (uptr, cptr);\r |
| 173 | lpt_err = (lpt_unit.flags & UNIT_ATT) == 0;\r |
| 174 | return reason;\r |
| 175 | }\r |
| 176 | \r |
| 177 | /* Detach routine */\r |
| 178 | \r |
| 179 | t_stat lpt_detach (UNIT *uptr)\r |
| 180 | {\r |
| 181 | lpt_err = 1;\r |
| 182 | return detach_unit (uptr);\r |
| 183 | }\r |