diff --git a/Doc/ChangeLog.txt b/Doc/ChangeLog.txt
index f04237eb..6d2056fc 100644
--- a/Doc/ChangeLog.txt
+++ b/Doc/ChangeLog.txt
@@ -25,6 +25,7 @@ Version 3.1.1
 - WBW: CP/M 3 RTC support is now complete (reads and writes RTC date/time)
 - WBW: Add config to allow swapping logical order of MT011 SPI ports
 - WBW: COPY.COM updated from v1.72 -> v1.73 throughout distribution
+- D?M: CP/NET for CP/M 2.2 and CP/M 3 (requires MT011)
 
 Version 3.1
 -----------
diff --git a/Readme.unix b/Readme.unix
index 0ba3de23..970c1b35 100644
--- a/Readme.unix
+++ b/Readme.unix
@@ -34,6 +34,18 @@ to build the "126" configuration of the "SCZ180" platform:
 
 	make ROM_PLATFORM=SCZ180 ROM_CONFIG=126
 
+Please be aware that the make-based build does have a couple of
+deficiencies.
+
+First, there are some build failures that will not stop the make 
+process.  Some of this is because real CP/M 2.2 tools are used in 
+places and CP/M 2.2 does not allow programs to return a result code.
+
+Second, not all dependencies are properly handled.  So, changes to some
+files will not cause things to rebuild as appropriate.  In general, I
+recommend doing a "make clean" before running "make" to ensure that
+everything is fully rebuilt.
+
 For macOS users, you may encounter a failure reading or writing files.
 This is caused by protection features in macOS (at least, in Catalina)
 that prevent programs built on your local system (unsigned) from
diff --git a/Source/HBIOS/Config/RCZ180_ext.asm b/Source/HBIOS/Config/RCZ180_ext.asm
index 262e5507..c401e771 100644
--- a/Source/HBIOS/Config/RCZ180_ext.asm
+++ b/Source/HBIOS/Config/RCZ180_ext.asm
@@ -22,7 +22,6 @@
 ; PLEASE REFER TO THE CUSTOM BUILD INSTRUCTIONS (README.TXT) IN THE SOURCE DIRECTORY (TWO
 ; DIRECTORIES ABOVE THIS ONE).
 ;
-#DEFINE PLATFORM_NAME "RC2014 (EXT MMU)"
 #DEFINE	BOOT_DEFAULT	"H"		; DEFAULT BOOT LOADER CMD ON <CR> OR AUTO BOOT
 ;
 #include "cfg_rcz180.asm"
diff --git a/Source/HBIOS/Config/RCZ180_nat.asm b/Source/HBIOS/Config/RCZ180_nat.asm
index 0f7da479..061e6117 100644
--- a/Source/HBIOS/Config/RCZ180_nat.asm
+++ b/Source/HBIOS/Config/RCZ180_nat.asm
@@ -22,7 +22,6 @@
 ; PLEASE REFER TO THE CUSTOM BUILD INSTRUCTIONS (README.TXT) IN THE SOURCE DIRECTORY (TWO
 ; DIRECTORIES ABOVE THIS ONE).
 ;
-#DEFINE PLATFORM_NAME "RC2014 (NATIVE MMU)"
 #DEFINE	BOOT_DEFAULT	"H"		; DEFAULT BOOT LOADER CMD ON <CR> OR AUTO BOOT
 ;
 #include "cfg_rcz180.asm"
diff --git a/Source/HBIOS/netboot.mod b/Source/HBIOS/netboot.mod
index 95504ec4..12ee0b55 100644
Binary files a/Source/HBIOS/netboot.mod and b/Source/HBIOS/netboot.mod differ
diff --git a/Source/Images/d_cpm22/u4/ccp.spr b/Source/Images/d_cpm22/u4/ccp.spr
new file mode 100644
index 00000000..ab2e57bf
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diff --git a/Source/Images/d_cpm22/u4/cpm2net.hlp b/Source/Images/d_cpm22/u4/cpm2net.hlp
new file mode 100644
index 00000000..b7381254
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diff --git a/Source/Images/d_cpm22/u4/cpnboot.com b/Source/Images/d_cpm22/u4/cpnboot.com
new file mode 100644
index 00000000..48c07493
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diff --git a/Source/Images/d_cpm22/u4/cpnet12.hlp b/Source/Images/d_cpm22/u4/cpnet12.hlp
new file mode 100644
index 00000000..6562f67a
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diff --git a/Source/Images/d_cpm22/u4/cpnetldr.com b/Source/Images/d_cpm22/u4/cpnetldr.com
new file mode 100644
index 00000000..12ddeae2
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new file mode 100644
index 00000000..81621fdd
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index 00000000..7ce71ce2
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index 00000000..e52cb75a
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index 00000000..34e1829c
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index 00000000..fc059511
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diff --git a/Source/Images/d_cpm22/u4/login.com b/Source/Images/d_cpm22/u4/login.com
new file mode 100644
index 00000000..3a089680
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diff --git a/Source/Images/d_cpm22/u4/logoff.com b/Source/Images/d_cpm22/u4/logoff.com
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index 00000000..ccd56c6e
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diff --git a/Source/Images/d_cpm22/u4/mail.com b/Source/Images/d_cpm22/u4/mail.com
new file mode 100644
index 00000000..8ebb02be
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diff --git a/Source/Images/d_cpm22/u4/ndos.spr b/Source/Images/d_cpm22/u4/ndos.spr
new file mode 100644
index 00000000..fc2dcaa9
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diff --git a/Source/Images/d_cpm22/u4/netdown.com b/Source/Images/d_cpm22/u4/netdown.com
new file mode 100644
index 00000000..52aed9be
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diff --git a/Source/Images/d_cpm22/u4/netstat.com b/Source/Images/d_cpm22/u4/netstat.com
new file mode 100644
index 00000000..7b933533
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diff --git a/Source/Images/d_cpm22/u4/network.com b/Source/Images/d_cpm22/u4/network.com
new file mode 100644
index 00000000..5b6322b1
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new file mode 100644
index 00000000..99ed9682
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diff --git a/Source/Images/d_cpm22/u4/rdate.com b/Source/Images/d_cpm22/u4/rdate.com
new file mode 100644
index 00000000..10cbfded
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diff --git a/Source/Images/d_cpm22/u4/snios.spr b/Source/Images/d_cpm22/u4/snios.spr
new file mode 100644
index 00000000..b191dcd5
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new file mode 100644
index 00000000..87180dc5
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new file mode 100644
index 00000000..e9843305
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new file mode 100644
index 00000000..d8b6dd36
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new file mode 100644
index 00000000..0585966f
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index 00000000..d808e6c5
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new file mode 100644
index 00000000..da78ba84
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diff --git a/Source/Images/d_cpm3/u4/cpm3net.hlp b/Source/Images/d_cpm3/u4/cpm3net.hlp
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index 00000000..4066664b
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new file mode 100644
index 00000000..116c6895
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index 00000000..81621fdd
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index 00000000..7ce71ce2
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index 00000000..e52cb75a
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index 00000000..34e1829c
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index 00000000..fc059511
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index 00000000..3a089680
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index 00000000..ccd56c6e
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index 00000000..8ebb02be
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index 00000000..2edf1c42
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index 00000000..52aed9be
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index 00000000..7b933533
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index 00000000..5b6322b1
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new file mode 100644
index 00000000..2716d473
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index 00000000..99ed9682
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index 00000000..10cbfded
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index 00000000..dadd9cd2
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index 00000000..7b9a1804
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index 00000000..87180dc5
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index 00000000..e9843305
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index 00000000..d8b6dd36
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index 00000000..0585966f
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index 00000000..d808e6c5
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index 00000000..da78ba84
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index 00000000..ab2e57bf
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index 00000000..48c07493
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index 00000000..6562f67a
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index 00000000..81621fdd
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index 00000000..7ce71ce2
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index 00000000..8ebb02be
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index 00000000..fc2dcaa9
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index 00000000..52aed9be
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index 00000000..5b6322b1
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index 00000000..99ed9682
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index 00000000..10cbfded
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diff --git a/Source/Images/d_zsdos/u4/snios.spr b/Source/Images/d_zsdos/u4/snios.spr
new file mode 100644
index 00000000..b191dcd5
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index 00000000..87180dc5
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new file mode 100644
index 00000000..e9843305
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diff --git a/Source/Images/d_zsdos/u4/wizcfg.com b/Source/Images/d_zsdos/u4/wizcfg.com
new file mode 100644
index 00000000..d8b6dd36
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diff --git a/Source/Images/d_zsdos/u4/wizdbg.com b/Source/Images/d_zsdos/u4/wizdbg.com
new file mode 100644
index 00000000..0585966f
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diff --git a/Source/Images/d_zsdos/u4/wiztest.com b/Source/Images/d_zsdos/u4/wiztest.com
new file mode 100644
index 00000000..d808e6c5
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diff --git a/Source/Images/d_zsdos/u4/xsubnet.com b/Source/Images/d_zsdos/u4/xsubnet.com
new file mode 100644
index 00000000..da78ba84
Binary files /dev/null and b/Source/Images/d_zsdos/u4/xsubnet.com differ
diff --git a/Source/ver.inc b/Source/ver.inc
index ba95f818..9db46fd9 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,4 +2,4 @@
 #DEFINE	RMN	1
 #DEFINE	RUP	1
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.1.1-pre.73"
+#DEFINE BIOSVER	"3.1.1-pre.74"
diff --git a/Source/ver.lib b/Source/ver.lib
index 0023e723..88f15b0b 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	1
 rup	equ	1
 rtp	equ	0
 biosver	macro
-	db	"3.1.1-pre.73"
+	db	"3.1.1-pre.74"
 	endm