First Commit of my working state

[simh.git] / HP2100 / hp2100_cpu0.c

/* hp2100_cpu0.c: HP 1000 unimplemented instruction set stubs\r
\r
   Copyright (c) 2006-2008, J. David Bryan\r
\r
   Permission is hereby granted, free of charge, to any person obtaining a\r
   copy of this software and associated documentation files (the "Software"),\r
   to deal in the Software without restriction, including without limitation\r
   the rights to use, copy, modify, merge, publish, distribute, sublicense,\r
   and/or sell copies of the Software, and to permit persons to whom the\r
   Software is furnished to do so, subject to the following conditions:\r
\r
   The above copyright notice and this permission notice shall be included in\r
   all copies or substantial portions of the Software.\r
\r
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL\r
   THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
   IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
\r
   Except as contained in this notice, the name of the author shall not be\r
   used in advertising or otherwise to promote the sale, use or other dealings\r
   in this Software without prior written authorization from the author.\r
\r
   CPU0         Unimplemented firmware option instructions\r
\r
   26-Feb-08    HV      Removed and implemented "cpu_vis" and "cpu_signal"\r
   22-Nov-07    JDB     Removed and implemented "cpu_rte_ema"\r
   12-Nov-07    JDB     Removed and implemented "cpu_rte_vma" and "cpu_rte_os"\r
   01-Dec-06    JDB     Removed and implemented "cpu_sis".\r
   26-Sep-06    JDB     Created\r
\r
   This file contains template simulations for the firmware options that have\r
   not yet been implemented.  When a given firmware option is implemented, it\r
   should be moved out of this file and into another (or its own, depending on\r
   complexity).\r
\r
   Primary references:\r
   - HP 1000 M/E/F-Series Computers Technical Reference Handbook\r
        (5955-0282, Mar-1980)\r
   - HP 1000 M/E/F-Series Computers Engineering and Reference Documentation\r
        (92851-90001, Mar-1981)\r
   - Macro/1000 Reference Manual (92059-90001, Dec-1992)\r
\r
   Additional references are listed with the associated firmware\r
   implementations, as are the HP option model numbers pertaining to the\r
   applicable CPUs.\r
*/\r
\r
#include "hp2100_defs.h"\r
#include "hp2100_cpu.h"\r
#include "hp2100_cpu1.h"\r
\r
\r
t_stat cpu_ds (uint32 IR, uint32 intrq);                /* Distributed System */\r
\r
\r
/* Distributed System\r
\r
   Distributed System firmware was provided with the HP 91740A DS/1000 product\r
   for use with the HP 12771A (12665A) Serial Interface and 12773A Modem\r
   Interface system interconnection kits.  Firmware permitted high-speed\r
   transfers with minimum impact to the processor.  The advent of the\r
   "intelligent" 12794A and 12825A HDLC cards, the 12793A and 12834A Bisync\r
   cards, and the 91750A DS-1000/IV software obviated the need for CPU firmware,\r
   as essentially the firmware was moved onto the I/O cards.\r
\r
   Primary documentation for the DS instructions has not been located.  However,\r
   examination of the DS/1000 sources reveals that two instruction were used by\r
   the DVA65 Serial Interface driver (91740-18071) and placed in the trap cells\r
   of the communications interfaces.  Presumably they handled interrupts from\r
   the cards.\r
\r
   Implementation of the DS instructions will also require simulation of the\r
   12665A Hardwired Serial Data Interface Card and the 12620A RTE Privileged\r
   Interrupt Fence.  These are required for DS/1000.\r
\r
   Option implementation by CPU was as follows:\r
\r
      2114    2115    2116    2100   1000-M  1000-E  1000-F\r
     ------  ------  ------  ------  ------  ------  ------\r
      N/A     N/A     N/A     N/A    91740A  91740B  91740B\r
\r
   The routines are mapped to instruction codes as follows:\r
\r
     Instr.  1000-M  1000-E/F  Description\r
     ------  ------  --------  ----------------------------------------------\r
             105520   105300   "Open loop" (trap cell handler)\r
             105521   105301   "Closed loop" (trap cell handler)\r
             105522   105302   [unknown]\r
     [test]  105524   105304   [self test]\r
\r
   Notes:\r
\r
     1. The E/F-Series opcodes were moved from 105340-357 to 105300-317 at\r
        revision 1813.\r
\r
     2. DS/1000 ROM data are available from Bitsavers.\r
\r
   Additional references (documents unavailable):\r
    - HP 91740A M-Series Distributed System (DS/1000) Firmware Installation\r
      Manual (91740-90007).\r
    - HP 91740B Distributed System (DS/1000) Firmware Installation Manual\r
      (91740-90009).\r
*/\r
\r
static const OP_PAT op_ds[16] = {\r
  OP_N,    OP_N,      OP_N,    OP_N,                    /*  ---    ---    ---    ---  */\r
  OP_N,    OP_N,      OP_N,    OP_N,                    /*  ---    ---    ---    ---  */\r
  OP_N,    OP_N,      OP_N,    OP_N,                    /*  ---    ---    ---    ---  */\r
  OP_N,    OP_N,      OP_N,    OP_N                     /*  ---    ---    ---    ---  */\r
  };\r
\r
t_stat cpu_ds (uint32 IR, uint32 intrq)\r
{\r
t_stat reason = SCPE_OK;\r
OPS op;\r
uint32 entry;\r
\r
if ((cpu_unit.flags & UNIT_DS) == 0)                    /* DS option installed? */\r
    return stop_inst;\r
\r
entry = IR & 017;                                       /* mask to entry point */\r
\r
if (op_ds[entry] != OP_N)\r
    if (reason = cpu_ops (op_ds[entry], op, intrq))     /* get instruction operands */\r
        return reason;\r
\r
switch (entry) {                                        /* decode IR<3:0> */\r
\r
    default:                                            /* others undefined */\r
        reason = stop_inst;\r
        }\r
\r
return reason;\r
}\r