diff --git a/bacnet-stack/ports/pic18/readme.txt b/bacnet-stack/ports/pic18/readme.txt
index 3b024559..dc3abfa5 100644
--- a/bacnet-stack/ports/pic18/readme.txt
+++ b/bacnet-stack/ports/pic18/readme.txt
@@ -30,7 +30,7 @@ Stack: Multi-bank Model
 MPLAB C18 Tab: General: Macro Definitions:
 PRINT_ENABLED=0
 BACDL_MSTP=1
-TSN_ENABLED=0
+TSM_ENABLED=0
 BIG_ENDIAN=0
 
 3. The linker script must reserve some extra stack space.
diff --git a/bacnet-stack/ports/pic18f6720/readme.txt b/bacnet-stack/ports/pic18f6720/readme.txt
new file mode 100644
index 00000000..dc3abfa5
--- /dev/null
+++ b/bacnet-stack/ports/pic18f6720/readme.txt
@@ -0,0 +1,44 @@
+BACnet Stack - SourceForge.net
+Build for MPLAB IDE
+
+These are some settings that are important when building 
+the BACnet Stack using MPLAB IDE and MCC18 Compiler,
+
+1. Add the files to the project that you need:
+abort.c, apdu.c, bacapp.c, bacdcode.c, bacerror.c,
+bacstr.c, crc.c, datetime.c, dcc.c, iam.c, 
+npdu.c, rd.c, reject.c, rp.c, whois.c, wp.c
+
+From ports/picxx: isr.c, main.c, rs485.c, mstp.c, dlmstp.c
+
+From demo/object/: device.c or dev_tiny.c
+objects as needed: ai.c, ao.c, etc.
+
+From demo/handler/:  txbuf.c, h_dcc.c, h_rd.c, h_rp.c or h_rp_tiny.c
+Additional handlers as needed: h_wp.c
+
+2. Project->Options->Project
+
+General Tab: Include Path:
+C:\code\bacnet-stack\;C:\code\bacnet-stack\demo\handler\;C:\code\bacnet-stack\demo\object\;C:\code\bacnet-stack\ports\pic18\
+
+MPLAB C18 Tab: Memory Model:
+Code: Large Code Model
+Data: Large Data Model
+Stack: Multi-bank Model
+
+MPLAB C18 Tab: General: Macro Definitions:
+PRINT_ENABLED=0
+BACDL_MSTP=1
+TSM_ENABLED=0
+BIG_ENDIAN=0
+
+3. The linker script must reserve some extra stack space.
+
+//DATABANK   NAME=gpr12      START=0xC00          END=0xCFF
+//DATABANK   NAME=gpr13      START=0xD00          END=0xDFF
+DATABANK   NAME=stackreg   START=0xC00          END=0xDFF          PROTECTED
+
+//STACK SIZE=0x100 RAM=gpr13
+STACK SIZE=0x200 RAM=stackreg
+