PDP11/pdp11_mscp.h

   1 /* pdp11_mscp.h: DEC MSCP and TMSCP definitionsn
   2
   3    Copyright (c) 2001-2005, Robert M Supnik
   4    Derived from work by Stephen F. Shirron
   5
   6    Permission is hereby granted, free of charge, to any person obtaining a
   7    copy of this software and associated documentation files (the "Software"),
   8    to deal in the Software without restriction, including without limitation
   9    the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10    and/or sell copies of the Software, and to permit persons to whom the
  11    Software is furnished to do so, subject to the following conditions:
  12
  13    The above copyright notice and this permission notice shall be included in
  14    all copies or substantial portions of the Software.
  15
  16    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19    ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  20    IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21    CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23    Except as contained in this notice, the name of Robert M Supnik shall not be
  24    used in advertising or otherwise to promote the sale, use or other dealings
  25    in this Software without prior written authorization from Robert M Supnik.
  26
  27    09-Jan-03    RMS     Tape read/write end pkt is longer than disk read/write
  28    20-Sep-02    RMS     Merged TMSCP definitions
  29 */
  30
  31 #ifndef _PDP11_MSCP_H_
  32 #define _PDP11_MSCP_H_  0
  33
  34 /* Misc constants */
  35
  36 #define UID_DISK        2                               /* disk class */
  37 #define UID_TAPE        3                               /* tape class */
  38
  39 /* Opcodes */
  40
  41 #define OP_ABO          1                               /* b: abort */
  42 #define OP_GCS          2                               /* b: get command status */
  43 #define OP_GUS          3                               /* b: get unit status */
  44 #define OP_SCC          4                               /* b: set controller char */
  45 #define OP_AVL          8                               /* b: available */
  46 #define OP_ONL          9                               /* b: online */
  47 #define OP_SUC          10                              /* b: set unit char */
  48 #define OP_DAP          11                              /* b: det acc paths - nop */
  49 #define OP_ACC          16                              /* b: access */
  50 #define OP_CCD          17                              /* d: compare - nop */
  51 #define OP_ERS          18                              /* b: erase */
  52 #define OP_FLU          19                              /* d: flush - nop */
  53 #define OP_ERG          22                              /* t: erase gap */
  54 #define OP_CMP          32                              /* b: compare */
  55 #define OP_RD           33                              /* b: read */
  56 #define OP_WR           34                              /* b: write */
  57 #define OP_WTM          36                              /* t: write tape mark */
  58 #define OP_POS          37                              /* t: reposition */
  59 #define OP_FMT          47                              /* d: format */
  60 #define OP_AVA          64                              /* b: unit now avail */
  61 #define OP_END          0x80                            /* b: end flag */
  62
  63 /* Modifiers */
  64
  65 #define MD_EXP          0x8000                          /* d: express NI */
  66 #define MD_CMP          0x4000                          /* b: compare NI */
  67 #define MD_CSE          0x2000                          /* b: clr ser err */
  68 #define MD_ERR          0x1000                          /* d: force error NI*/
  69 #define MD_CDL          0x1000                          /* t: clr data lost NI*/
  70 #define MD_SCH          0x0800                          /* t: supr cache NI */
  71 #define MD_SEC          0x0200                          /* b: supr err corr NI */
  72 #define MD_SER          0x0100                          /* b: supr err rec NI */
  73 #define MD_DLE          0x0080                          /* t: detect LEOT */
  74 #define MD_IMM          0x0040                          /* t: immediate NI */
  75 #define MD_EXA          0x0020                          /* b: excl access NI */
  76 #define MD_SHD          0x0010                          /* d: shadow NI */
  77 #define MD_UNL          0x0010                          /* t avl: unload */
  78 #define MD_ERW          0x0008                          /* t wr: enb rewrite */
  79 #define MD_REV          0x0008                          /* t rd, pos: reverse */
  80 #define MD_SWP          0x0004                          /* b suc: enb set wrp */
  81 #define MD_OBC          0x0004                          /* t: pos: obj count */
  82 #define MD_IMF          0x0002                          /* d onl: ign fmte NI */
  83 #define MD_RWD          0x0002                          /* t pos: rewind */
  84 #define MD_ACL          0x0002                          /* t avl: all class NI */
  85 #define MD_NXU          0x0001                          /* b gus: next unit */
  86 #define MD_RIP          0x0001                          /* d onl: allow rip NI */
  87
  88 /* End flags */
  89
  90 #define EF_LOG          0x0020                          /* b: error log */
  91 #define EF_SXC          0x0010                          /* b: serious exc */
  92 #define EF_EOT          0x0008                          /* end of tape */
  93 #define EF_PLS          0x0004                          /* pos lost */
  94 #define EF_DLS          0x0002                          /* cached data lost NI */
  95
  96 /* Controller flags */
  97
  98 #define CF_RPL          0x8000                          /* ctrl bad blk repl */
  99 #define CF_ATN          0x0080                          /* enb attention */
 100 #define CF_MSC          0x0040                          /* enb misc msgs */
 101 #define CF_OTH          0x0020                          /* enb othr host msgs */
 102 #define CF_THS          0x0010                          /* enb this host msgs */
 103 #define CF_MSK          (CF_ATN|CF_MSC|CF_OTH|CF_THS)
 104
 105 /* Unit flags */
 106
 107 #define UF_RPL          0x8000                          /* d: ctrl bad blk repl */
 108 #define UF_CAC          0x8000                          /* t: cache write back */
 109 #define UF_WPH          0x2000                          /* b: wr prot hwre */
 110 #define UF_WPS          0x1000                          /* b: wr prot swre */
 111 #define UF_SCH          0x0800                          /* t: supr cache NI */
 112 #define UF_EXA          0x0400                          /* b: exclusive NI */
 113 #define UF_WPD          0x0100                          /* b: wr prot data NI */
 114 #define UF_RMV          0x0080                          /* d: removable */
 115 #define UF_WBN          0x0040                          /* t: write back NI */
 116 #define UF_VSS          0x0020                          /* t: supr var speed NI */
 117 #define UF_VSU          0x0010                          /* t: var speed unit NI */
 118 #define UF_EWR          0x0008                          /* t: enh wr recovery NI */
 119 #define UF_CMW          0x0002                          /* cmp writes NI */
 120 #define UF_CMR          0x0001                          /* cmp reads NI */
 121
 122 /* Error log flags */
 123
 124 #define LF_SUC          0x0080                          /* b: successful */
 125 #define LF_CON          0x0040                          /* b: continuing */
 126 #define LF_BBR          0x0020                          /* d: bad blk repl NI */
 127 #define LF_RCT          0x0010                          /* d: err in repl NI */
 128 #define LF_SNR          0x0001                          /* b: seq # reset */
 129
 130 /* Error log formats */
 131
 132 #define FM_CNT          0                               /* b: port lf err */
 133 #define FM_BAD          1                               /* b: bad host addr */
 134 #define FM_DSK          2                               /* d: disk xfer */
 135 #define FM_SDI          3                               /* d: SDI err */
 136 #define FM_SDE          4                               /* d: sm disk err */
 137 #define FM_TAP          5                               /* t: tape errors */
 138 #define FM_RPL          9                               /* d: bad blk repl */
 139
 140 /* Status codes */
 141
 142 #define ST_SUC          0                               /* b: successful */
 143 #define ST_CMD          1                               /* b: invalid cmd */
 144 #define ST_ABO          2                               /* b: aborted cmd */
 145 #define ST_OFL          3                               /* b: unit offline */
 146 #define ST_AVL          4                               /* b: unit avail */
 147 #define ST_MFE          5                               /* b: media fmt err */
 148 #define ST_WPR          6                               /* b: write prot err */
 149 #define ST_CMP          7                               /* b: compare err */
 150 #define ST_DAT          8                               /* b: data err */
 151 #define ST_HST          9                               /* b: host acc err */
 152 #define ST_CNT          10                              /* b: ctrl err */
 153 #define ST_DRV          11                              /* b: drive err */
 154 #define ST_FMT          12                              /* t: formatter err */
 155 #define ST_BOT          13                              /* t: BOT encountered */
 156 #define ST_TMK          14                              /* t: tape mark */
 157 #define ST_RDT          16                              /* t: record trunc */
 158 #define ST_POL          17                              /* t: pos lost */
 159 #define ST_SXC          18                              /* b: serious exc */
 160 #define ST_LED          19                              /* t: LEOT detect */
 161 #define ST_BBR          20                              /* d: bad block */
 162 #define ST_DIA          31                              /* b: diagnostic */
 163 #define ST_V_SUB        5                               /* subcode */
 164 #define ST_V_INV        8                               /* invalid op */
 165
 166 /* Status subcodes */
 167
 168 #define SB_SUC_IGN      (1 << ST_V_SUB)                 /* t: unload ignored */
 169 #define SB_SUC_ON       (8 << ST_V_SUB)                 /* b: already online */
 170 #define SB_SUC_EOT      (32 << ST_V_SUB)                /* t: EOT encountered */
 171 #define SB_SUC_RO       (128 << ST_V_SUB)               /* t: read only */
 172 #define SB_OFL_NV       (1 << ST_V_SUB)                 /* b: no volume */
 173 #define SB_OFL_INOP     (2 << ST_V_SUB)                 /* t: inoperative */
 174 #define SB_AVL_INU      (32 << ST_V_SUB)                /* b: in use */
 175 #define SB_WPR_SW       (128 << ST_V_SUB)               /* b: swre wlk */
 176 #define SB_WPR_HW       (256 << ST_V_SUB)               /* b: hwre wlk */
 177 #define SB_HST_OA       (1 << ST_V_SUB)                 /* b: odd addr */
 178 #define SB_HST_OC       (2 << ST_V_SUB)                 /* d: odd count */
 179 #define SB_HST_NXM      (3 << ST_V_SUB)                 /* b: nx memory */
 180 #define SB_HST_PAR      (4 << ST_V_SUB)                 /* b: parity err */
 181 #define SB_HST_PTE      (5 << ST_V_SUB)                 /* b: mapping err */
 182 #define SB_DAT_RDE      (7 << ST_V_SUB)                 /* t: read err */
 183
 184 /* Status invalid command subcodes */
 185
 186 #define I_OPCD          (8 << ST_V_INV)                 /* inv opcode */
 187 #define I_FLAG          (9 << ST_V_INV)                 /* inv flags */
 188 #define I_MODF          (10 << ST_V_INV)                /* inv modifier */
 189 #define I_BCNT          (12 << ST_V_INV)                /* inv byte cnt */
 190 #define I_LBN           (28 << ST_V_INV)                /* inv LBN */
 191 #define I_VRSN          (12 << ST_V_INV)                /* inv version */
 192 #define I_FMTI          (28 << ST_V_INV)                /* inv format */
 193
 194 /* Tape format flags */
 195
 196 #define TF_9TK          0x0100                          /* 9 track */
 197 #define TF_9TK_NRZ      0x0001                          /* 800 bpi */
 198 #define TF_9TK_PE       0x0002                          /* 1600 bpi */
 199 #define TF_9TK_GRP      0x0004                          /* 6250 bpi */
 200 #define TF_CTP          0x0200                          /* TK50 */
 201 #define TF_CTP_LO       0x0001                          /* low density */
 202 #define TF_CTP_HI       0x0002                          /* hi density */
 203 #define TF_3480         0x0300                          /* 3480 */
 204 #define TF_WOD          0x0400                          /* RV80 */
 205
 206 /* Packet formats - note that all packet lengths must be multiples of 4 bytes */
 207
 208 /* Command packet header */
 209
 210 #define CMD_REFL        2                               /* ref # */
 211 #define CMD_REFH        3
 212 #define CMD_UN          4                               /* unit # */
 213 /*                      5                               /* reserved */
 214 #define CMD_OPC         6                               /* opcode */
 215 #define CMD_MOD         7                               /* modifier */
 216
 217 #define CMD_OPC_V_OPC   0                               /* opcode */
 218 #define CMD_OPC_M_OPC   0xFF
 219 #define CMD_OPC_V_CAA   8                               /* cache NI */
 220 #define CMD_OPC_M_CAA   0xFF
 221 #define CMD_OPC_V_FLG   8                               /* flags */
 222 #define CMD_OPC_M_FLG   0xFF
 223
 224 /* Response packet header */
 225
 226 #define RSP_LNT         12
 227 #define RSP_REFL        2                               /* ref # */
 228 #define RSP_REFH        3
 229 #define RSP_UN          4                               /* unit # */
 230 #define RSP_RSV         5                               /* reserved */
 231 #define RSP_OPF         6                               /* opcd,flg */
 232 #define RSP_STS         7                               /* modifiers */
 233
 234 #define RSP_OPF_V_OPC   0                               /* opcode */
 235 #define RSP_OPF_V_FLG   8                               /* flags */
 236
 237 /* Abort packet - 2 W parameter, 2 W status  */
 238
 239 #define ABO_LNT         16
 240 #define ABO_REFL        8                               /* ref # */
 241 #define ABO_REFH        9
 242
 243 /* Avail packet - min size */
 244
 245 #define AVL_LNT         12
 246
 247 /* Erase packet - min size */
 248
 249 #define ERS_LNT         12
 250
 251 /* Erase gap - min size */
 252
 253 #define ERG_LNT         12
 254
 255 /* Flush - 10 W status (8 undefined) */
 256
 257 #define FLU_LNT         32
 258 /*                      8 - 15                          /* reserved */
 259 #define FLU_POSL        16                              /* position */
 260 #define FLU_POSH        17
 261
 262 /* Write tape mark - 10W status (8 undefined) */
 263
 264 #define WTM_LNT         32
 265 /*                      8 - 15                          /* reserved */
 266 #define WTM_POSL        16                              /* position */
 267 #define WTM_POSH        17
 268
 269 /* Get command status packet - 2 W parameter, 4 W status */
 270
 271 #define GCS_LNT         20
 272 #define GCS_REFL        8                               /* ref # */
 273 #define GCS_REFH        9
 274 #define GCS_STSL        10                              /* status */
 275 #define GCS_STSH        11
 276
 277 /* Format packet - 8 W parameters, none returned */
 278
 279 #define FMT_LNT         12
 280 #define FMT_IH          17                              /* magic bit */
 281
 282 /* Get unit status packet - 18 W status (disk), 16W status (tape) */
 283
 284 #define GUS_LNT_D       48
 285 #define GUS_LNT_T       44
 286 #define GUS_MLUN        8                               /* mlun */
 287 #define GUS_UFL         9                               /* flags */
 288 #define GUS_RSVL        10                              /* reserved */
 289 #define GUS_RSVH        11
 290 #define GUS_UIDA        12                              /* unit ID */
 291 #define GUS_UIDB        13
 292 #define GUS_UIDC        14
 293 #define GUS_UIDD        15
 294 #define GUS_MEDL        16                              /* media ID */
 295 #define GUS_MEDH        17
 296 #define GUS_UVER        23                              /* unit version */
 297
 298 /* Disk specific status */
 299
 300 #define GUS_SHUN        18                              /* shadowing */
 301 #define GUS_SHST        19
 302 #define GUS_TRK         20                              /* track */
 303 #define GUS_GRP         21                              /* group */
 304 #define GUS_CYL         22                              /* cylinder */
 305 #define GUS_RCTS        24                              /* RCT size */
 306 #define GUS_RBSC        25                              /* RBNs, copies */
 307
 308 /* Tape specific status */
 309
 310 #define GUS_FMT         18                              /* format */
 311 #define GUS_SPEED       19                              /* speed */
 312 #define GUS_MENU        20                              /* menu */
 313 #define GUS_CAP         21                              /* capacity */
 314 #define GUS_FVER        22                              /* fmtr version */
 315
 316 #define GUS_UIDD_V_MOD  0                               /* unit model */
 317 #define GUS_UIDD_V_CLS  8                               /* unit class */
 318 #define GUS_RB_V_RBNS   0                               /* RBNs/track */
 319 #define GUS_RB_V_RCTC   8                               /* RCT copies */
 320
 321 /* Unit online - 2 W parameter, 16 W status (disk or tape) */
 322
 323 #define ONL_LNT         44
 324 #define ONL_MLUN        8                               /* mlun */
 325 #define ONL_UFL         9                               /* flags */
 326 #define ONL_RSVL        10                              /* reserved */
 327 #define ONL_RSVH        11
 328 #define ONL_UIDA        12                              /* unit ID */
 329 #define ONL_UIDB        13
 330 #define ONL_UIDC        14
 331 #define ONL_UIDD        15
 332 #define ONL_MEDL        16                              /* media ID */
 333 #define ONL_MEDH        17
 334
 335 /* Disk specific status */
 336
 337 #define ONL_SHUN        18                              /* shadowing */
 338 #define ONL_SHST        19
 339 #define ONL_SIZL        20                              /* size */
 340 #define ONL_SIZH        21
 341 #define ONL_VSNL        22                              /* vol ser # */
 342 #define ONL_VSNH        23
 343
 344 /* Tape specific status */
 345
 346 #define ONL_FMT         18                              /* format */
 347 #define ONL_SPD         19                              /* speed */
 348 #define ONL_MAXL        20                              /* max rec size */
 349 #define ONL_MAXH        21
 350 #define ONL_NREC        22                              /* noise rec */
 351 #define ONL_RSVE        23                              /* reserved */
 352
 353 #define ONL_UIDD_V_MOD  0                               /* unit model */
 354 #define ONL_UIDD_V_CLS  8                               /* unit class */
 355
 356 /* Set controller characteristics packet - 8 W parameters, 10 W status */
 357
 358 #define SCC_LNT         32
 359 #define SCC_MSV         8                               /* MSCP version */
 360 #define SCC_CFL         9                               /* flags */
 361 #define SCC_TMO         10                              /* timeout */
 362 #define SCC_VER         11                              /* ctrl version */
 363 #define SCC_CIDA        12                              /* ctrl ID */
 364 #define SCC_CIDB        13
 365 #define SCC_CIDC        14
 366 #define SCC_CIDD        15
 367 #define SCC_MBCL        16                              /* max byte count */
 368 #define SCC_MBCH        17
 369
 370 #define SCC_VER_V_SVER  0                               /* swre vrsn */
 371 #define SCC_VER_V_HVER  8                               /* hwre vrsn */
 372 #define SCC_CIDD_V_MOD  0                               /* ctrl model */
 373 #define SCC_CIDD_V_CLS  8                               /* ctrl class */
 374
 375 /* Set unit characteristics - 2 W parameter, 16 W status - same as ONL */
 376
 377 #define SUC_LNT         44
 378
 379 /* Reposition - 4 W parameters, 10 W status */
 380
 381 #define POS_LNT         32
 382 #define POS_RCL         8                               /* record cnt */
 383 #define POS_RCH         9
 384 #define POS_TMCL        10                              /* tape mk cnt */
 385 #define POS_TMCH        11
 386 /* reserved             12 - 15 */
 387 #define POS_POSL        16                              /* position */
 388 #define POS_POSH        17
 389
 390 /* Data transfer packet - 10 W parameters (disk), 6W parameters (tape),
 391    10 W status (disk), 12W status (tape) */
 392
 393 #define RW_LNT_D        32
 394 #define RW_LNT_T        36
 395 #define RW_BCL          8                               /* byte count */
 396 #define RW_BCH          9
 397 #define RW_BAL          10                              /* buff desc */
 398 #define RW_BAH          11
 399 #define RW_MAPL         12                              /* map table */
 400 #define RW_MAPH         13
 401 /*                      14                              /* reserved */
 402 /*                      15                              /* reserved */
 403
 404 /* Disk specific parameters */
 405
 406 #define RW_LBNL         16                              /* LBN */
 407 #define RW_LBNH         17
 408 #define RW_WBCL         18                              /* working bc */
 409 #define RW_WBCH         19
 410 #define RW_WBAL         20                              /* working ba */
 411 #define RW_WBAH         21
 412 #define RW_WBLL         22                              /* working lbn */
 413 #define RW_WBLH         23
 414
 415 /* Tape specific status */
 416
 417 #define RW_POSL         16                              /* position */
 418 #define RW_POSH         17
 419 #define RW_RSZL         18                              /* record size */
 420 #define RW_RSZH         19
 421
 422 /* Error log packet header */
 423
 424 #define ELP_REFL        2                               /* ref # */
 425 #define ELP_REFH        3
 426 #define ELP_UN          4                               /* unit */
 427 #define ELP_SEQ         5
 428 #define ELP_FF          6                               /* fmt,flg */
 429 #define ELP_EVT         7                               /* event */
 430
 431 #define ELP_EV_V_FMT    0                               /* format */
 432 #define ELP_EV_V_FLG    8                               /* flag */
 433
 434 /* Port last failure error log packet - 6 W status */
 435
 436 #define PLF_LNT         24                              /* length */
 437 #define PLF_CIDA        8                               /* ctrl ID */
 438 #define PLF_CIDB        9
 439 #define PLF_CIDC        10
 440 #define PLF_CIDD        11
 441 #define PLF_VER         12                              /* ctrl version */
 442 #define PLF_ERR         13                              /* err */
 443
 444 #define PLF_CIDD_V_MOD  0                               /* ctrl model */
 445 #define PLF_CIDD_V_CLS  8                               /* ctrl class */
 446 #define PLF_VER_V_SVER  0                               /* swre ver */
 447 #define PLF_VER_V_HVER  8                               /* hwre ver */
 448
 449 /* Disk transfer error log packet - 18 W status */
 450
 451 #define DTE_LNT         48
 452 #define DTE_CIDA        8                               /* ctrl ID */
 453 #define DTE_CIDB        9
 454 #define DTE_CIDC        10
 455 #define DTE_CIDD        11
 456 #define DTE_VER         12                              /* version */
 457 #define DTE_MLUN        13                              /* mlun */
 458 #define DTE_UIDA        14                              /* unit ID */
 459 #define DTE_UIDB        15
 460 #define DTE_UIDC        16
 461 #define DTE_UIDD        17
 462 #define DTE_UVER        18
 463 #define DTE_D2          23
 464 #define DTE_D3          24
 465 #define DTE_D4          25
 466
 467 /* Disk specific status */
 468
 469 #define DTE_SCYL        19                              /* cylinder */
 470 #define DTE_VSNL        20                              /* vol ser # */
 471 #define DTE_VSNH        21
 472 #define DTE_D1          22                              /* dev params */
 473
 474 /* Tape specific status */
 475
 476 #define DTE_RETR        19                              /* retry */
 477 #define DTE_POSL        20                              /* position */
 478 #define DTE_POSH        21
 479 #define DTE_FVER        22                              /* formatter ver */
 480
 481 #define DTE_CIDD_V_MOD  0                               /* ctrl model */
 482 #define DTE_CIDD_V_CLS  8                               /* ctrl class */
 483 #define DTE_VER_V_SVER  0                               /* ctrl swre ver */
 484 #define DTE_VER_V_HVER  8                               /* ctrl hwre ver */
 485 #define DTE_UIDD_V_MOD  0                               /* unit model */
 486 #define DTE_UIDD_V_CLS  8                               /* unit class */
 487 #define DTE_D2_V_SECT   8
 488 #define DTE_D3_V_SURF   0
 489 #define DTE_D3_V_CYL    8
 490
 491 /* Host bus error log packet - 8 W status */
 492
 493 #define HBE_LNT         28
 494 #define HBE_CIDA        8                               /* ctrl ID */
 495 #define HBE_CIDB        9
 496 #define HBE_CIDC        10
 497 #define HBE_CIDD        11
 498 #define HBE_VER         12                              /* ctrl version */
 499 #define HBE_RSV         13                              /* reserved */
 500 #define HBE_BADL        14                              /* bad address */
 501 #define HBE_BADH        15
 502
 503 #define HBE_CIDD_V_MOD  0                               /* ctrl model */
 504 #define HBE_CIDD_V_CLS  8                               /* ctrl class */
 505 #define HBE_VER_V_SVER  0                               /* ctrl swre ver */
 506 #define HBE_VER_V_HVER  8                               /* ctrl hwre ver */
 507
 508 /* Unit now available attention message - 10 W status, same as
 509    first 10 W of status from get unit status
 510 */
 511
 512 #define UNA_LNT         32
 513
 514 #endif