LGP/lgp_defs.h

   1 /* lgp_defs.h: LGP simulator definitions
   2
   3    Copyright (c) 2004-2005, 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    be 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
  27 #ifndef _LGP_DEFS_H_
  28 #define _LGP_DEFS_H_    0
  29
  30 #include "sim_defs.h"                                   /* simulator defns */
  31
  32 /* Simulator stop codes */
  33
  34 #define STOP_STOP       1                               /* STOP */
  35 #define STOP_IBKPT      2                               /* breakpoint */
  36 #define STOP_OVF        3                               /* overflow */
  37 #define STOP_NXDEV      4                               /* non-existent device */
  38 #define STOP_STALL      5                               /* IO stall */
  39
  40 /* Memory */
  41
  42 #define MEMSIZE         4096                            /* memory size */
  43 #define AMASK           0xFFF                           /* addr mask */
  44 #define NTK_30          64
  45 #define NSC_30          64
  46 #define SCMASK_30       0x03F                           /* sector mask */
  47 #define NTK_21          32
  48 #define NSC_21          128
  49 #define SCMASK_21       0x07F
  50 #define RPM             4000                            /* rev/minutes */
  51 #define WPS             ((NSC_30 * RPM) / 60)           /* words/second */
  52
  53 /* Architectural constants */
  54
  55 #define SIGN            0x80000000                      /* sign */
  56 #define DMASK           0xFFFFFFFF                      /* data mask */
  57 #define MMASK           0xFFFFFFFE                      /* memory mask */
  58
  59 /* Instruction format */
  60
  61 #define I_M_OP          0xF                             /* opcode */
  62 #define I_V_OP          16
  63 #define I_OP            (I_M_OP << I_V_OP)
  64 #define I_GETOP(x)      (((x) >> I_V_OP) & I_M_OP)
  65 #define I_M_EA          AMASK                           /* address */
  66 #define I_V_EA          2
  67 #define I_EA            (I_M_EA << I_V_EA)
  68 #define I_GETEA(x)      (((x) >> I_V_EA) & I_M_EA)
  69 #define I_M_TK          0x3F                            /* LGP-30 char */
  70 #define I_V_TK          8                               /* LGP-21 device */
  71 #define I_GETTK(x)      (((x) >> I_V_TK) & I_M_TK)
  72
  73 /* Unit flags */
  74
  75 #define UNIT_V_LGP21    (UNIT_V_UF + 0)
  76 #define UNIT_V_MANI     (UNIT_V_UF + 1)
  77 #define UNIT_V_INPT     (UNIT_V_UF + 2)
  78 #define UNIT_V_OUTPT    (UNIT_V_UF + 3)
  79 #define UNIT_V_IN4B     (UNIT_V_UF + 4)
  80 #define UNIT_V_TTSS_D   (UNIT_V_UF + 5)
  81 #define UNIT_V_LGPH_D   (UNIT_V_UF + 6)
  82 #define UNIT_V_FLEX_D   (UNIT_V_UF + 7)                 /* Flex default */
  83 #define UNIT_V_FLEX     (UNIT_V_UF + 8)                 /* Flex format */
  84 #define UNIT_V_NOCS     (UNIT_V_UF + 9)                 /* ignore cond stop */
  85 #define UNIT_LGP21      (1u << UNIT_V_LGP21)
  86 #define UNIT_MANI       (1u << UNIT_V_MANI)
  87 #define UNIT_INPT       (1u << UNIT_V_INPT)
  88 #define UNIT_OUTPT      (1u << UNIT_V_OUTPT)
  89 #define UNIT_IN4B       (1u << UNIT_V_IN4B)
  90 #define UNIT_TTSS_D     (1u << UNIT_V_TTSS_D)
  91 #define UNIT_LGPH_D     (1u << UNIT_V_LGPH_D)
  92 #define UNIT_FLEX_D     (1u << UNIT_V_FLEX_D)
  93 #define UNIT_FLEX       (1u << UNIT_V_FLEX)
  94 #define UNIT_NOCS       (1u << UNIT_V_NOCS)
  95 #define Q_LGP21         (cpu_unit.flags & UNIT_LGP21)
  96 #define Q_MANI          (cpu_unit.flags & UNIT_MANI)
  97 #define Q_INPT          (cpu_unit.flags & UNIT_INPT)
  98 #define Q_OUTPT         (cpu_unit.flags & UNIT_OUTPT)
  99 #define Q_IN4B          (cpu_unit.flags & UNIT_IN4B)
 100
 101 /* IO return */
 102
 103 #define IORETURN(f,v)   ((f)? (v): SCPE_OK)             /* stop on error */
 104
 105 /* Significant characters */
 106
 107 #define FLEX_LC         0x04
 108 #define FLEX_UC         0x08
 109 #define FLEX_CR         0x10
 110 #define FLEX_BS         0x14
 111 #define FLEX_CSTOP      0x20
 112 #define FLEX_DEL        0x3F
 113
 114 /* LGP-21 device assignments */
 115
 116 #define DEV_PT          0
 117 #define DEV_TT          2
 118 #define DEV_MASK        0x1F
 119 #define DEV_SHIFT       62
 120
 121 /* Instructions */
 122
 123 enum opcodes {
 124     OP_Z, OP_B, OP_Y, OP_R,
 125     OP_I, OP_D, OP_N, OP_M,
 126     OP_P, OP_E, OP_U, OP_T,
 127     OP_H, OP_C, OP_A, OP_S
 128     };
 129
 130 /* Prototypes */
 131
 132 uint32 Read (uint32 ea);
 133 void Write (uint32 ea, uint32 dat);
 134
 135 #endif