Correct bugs in db and sets up simulation mode

scripts/mdif.cmd

@@ -1,6 +1,15 @@
 require asyn
 require stream
 
+epicsEnvSet("$(NAME)_MDIF_HOST", "$(MDIF_IP):$(MDIF_PORT=2000)")
+
+$(SET_SIM_MODE=#) $(SET_SIM_MODE) require misc
+$(SET_SIM_MODE=#) $(SET_SIM_MODE) epicsEnvSet("$(NAME)_MDIF_HOST", "127.0.0.1:$(MDIF_PORT=3004)")
+$(SET_SIM_MODE=#) $(SET_SIM_MODE) system "$(mdif_DIR)mdif_sim.py $(MDIF_PORT=3004) &"
+# starting the python socket seems to take a while
+# and need misc to use built in sleep command
+$(SET_SIM_MODE=#) $(SET_SIM_MODE) sleep 3
+
 epicsEnvSet("PROTO", "$(mdif_DB)mdif.proto")
-drvAsynIPPortConfigure("ASYN_$(NAME)", "$(HOST)", 0,   0,   0)
+drvAsynIPPortConfigure("ASYN_$(NAME)", "$($(NAME)_MDIF_HOST)", 0,   0,   0)
 dbLoadRecords("$(mdif_DB)mdif.db", "INSTR=$(INSTR), NAME=$(NAME), PROTO=$(PROTO), ASYN_PORT=ASYN_$(NAME)")

scripts/sim-ioc.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+export EPICS_HOST_ARCH=linux-x86_64
+export EPICS_BASE=/usr/local/epics/base-7.0.7
+
+PARENT_PATH="$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )"
+
+exec /usr/local/bin/procServ -o -L - -f -i ^D^C 20001 "${PARENT_PATH}/sim-st.cmd"

scripts/sim-st.cmd

@@ -0,0 +1,13 @@
+#!/usr/local/bin/iocsh  
+
+on error break
+
+require mdif, wall_e
+
+epicsEnvSet("STREAM_PROTOCOL_PATH","./db")
+epicsEnvSet("INSTR","SQ:SIM:")
+
+epicsEnvSet("SET_SIM_MODE","") # Run Simulation Instead of Actual Interface
+runScript "$(mdif_DIR)mdif.cmd" "NAME=MDIF, MDIF_IP=127.0.0.1, MDIF_PORT=3004"
+
+iocInit()