diff --git a/Makelocal.mk.tpl b/Makelocal.mk.tpl
index 4e0b174..eac209f 100644
--- a/Makelocal.mk.tpl
+++ b/Makelocal.mk.tpl
@@ -5,4 +5,5 @@
 
 #PATH_SDCC       ?= /usr/bin
 #PATH_HEX2BIN    ?= /usr/bin
+#PATH_UNIX2DOS   ?= /usr/bin
 #PATH_OPENMSX    ?= /opt/openMSX/bin/
diff --git a/README.md b/README.md
index a729d09..08a6787 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@ for your specific needs or contribute a fix or feature.
 * sdcc
 * hex2bin
 * wget
+* unix2dos
 
 ## Usage
 
@@ -27,6 +28,7 @@ Include the msxbuild.mk file from your Makefile.
 And override the required paths;
 * PATH_SDCC       ?= /usr/bin
 * PATH_HEX2BIN    ?= /usr/bin
+* PATH_UNIX2DOS   ?= /usr/bin
 * PATH_OPENMSX    ?= /opt/openMSX/bin/
 * PATH_MSXBUILD   ?= /opt/msxbuild
 
diff --git a/lib/make/mb_assert.mk b/lib/make/mb_assert.mk
deleted file mode 100644
index 2a7ee53..0000000
--- a/lib/make/mb_assert.mk
+++ /dev/null
@@ -1,33 +0,0 @@
-
-define _mb_assert_success
-	@echo success: mb_assert_$(1)\; \'$(2)\'
-endef
-define _mb_assert_failure
-	@echo failure: mb_assert_$(1)\; \'$(2)\'
-	@exit 1
-endef
-define _mb_assert_if
-	$(if $(1),$(call _mb_assert_success,$(2),$(3)),$(call _mb_assert_failure,$(2),$(3)))
-endef
-define _mb_assert_if_not
-	$(if $(1),$(call _mb_assert_failure,$(2),$(3)),$(call _mb_assert_success,$(2),$(3)))
-endef
-
-# FIXME: Not stable
-#define mb_assert_file_contains
-#	$(call _mb_assert_if,$(findstring $(2),$(file < $(1))),file_contains,$(2))
-#endef
-define mb_assert_file_equals
-	$(call _mb_assert_if_not,$(subst $(2),,$(file < $(1))),file_equals,$(2))
-endef
-
-# Assert that the variable(s) are set and doesn't have non-empty values.
-# Params;
-#   1. Variable name(s) to validate.
-#   2. (optional) Error message to user.
-define mb_assert_defined
-	$(strip $(foreach 1,$1,$(call _mb_assert_defined_error,$1,$(strip $(value 2)))))
-endef
-define _mb_assert_defined_error
-	$(if $(value $1),,$(error Undefined $1$(if $2, ($2))))
-endef
diff --git a/lib/make/mb_base.mk b/lib/make/mb_base.mk
index b338d9c..4575c8a 100644
--- a/lib/make/mb_base.mk
+++ b/lib/make/mb_base.mk
@@ -21,6 +21,9 @@ endif
 # Remove space after separator
 MB_PSEP = $(strip $(MB_SEP))
 
+# Needed for comma in call arguments (like for l80.com) 
+MB_COMMA:=,
+
 define mb_clean
 	@echo === Cleaning build folder.
 	test $(1) && $(MB_RMDIR) $(1)
diff --git a/lib/make/mb_build.mk b/lib/make/mb_build.mk
index 69b9218..76d389f 100644
--- a/lib/make/mb_build.mk
+++ b/lib/make/mb_build.mk
@@ -1,17 +1,22 @@
 
-MB_BUILD_FLAG_CPU    ?= -mz80
-MB_BUILD_FLAG_LD     ?= --nostdinc
-MB_BUILD_SDASM_FLAGS ?= -g -l -c -o
-MB_BUILD_SDAR_FLAGS  ?= -rc
-MB_BUILD_H2B_CMD     ?= $(PATH_HEX2BIN)/hex2bin
-MB_BUILD_SDCC_CMD    ?= $(PATH_SDCC)/sdcc
-MB_BUILD_SDASM_CMD   ?= $(PATH_SDCC)/sdasz80
-MB_BUILD_SDAR_CMD    ?= $(PATH_SDCC)/sdar
+MB_BUILD_FLAG_CPU     ?= -mz80
+MB_BUILD_FLAG_LD      ?= --nostdinc
+MB_BUILD_SDASM_FLAGS  ?= -g -l -c -o
+MB_BUILD_SDAR_FLAGS   ?= -rc
+MB_BUILD_H2B_CMD      ?= $(PATH_HEX2BIN)/hex2bin
+MB_BUILD_SDCC_CMD     ?= $(PATH_SDCC)/sdcc
+MB_BUILD_SDASM_CMD    ?= $(PATH_SDCC)/sdasz80
+MB_BUILD_SDAR_CMD     ?= $(PATH_SDCC)/sdar
+MB_BUILD_UNIX2DOS_CMD ?= $(PATH_UNIX2DOS)/unix2dos
 
 # TODO: Add C + mixed support;
 #$(MB_SDASM) -I$(MB_LIBASM_SRC)/include
 #-l$(LIBASM_LINK)
 
+define mb_unix2dos
+	$(MB_BUILD_UNIX2DOS_CMD) -n $(1) $(2)
+endef
+
 define mb_compile_asm
 	@echo === Compile module asm.
 	$(MB_BUILD_SDASM_CMD) $(MB_BUILD_SDASM_FLAGS) $(1) $(2)
diff --git a/lib/make/mb_msxhub.mk b/lib/make/mb_msxhub.mk
index 3f53708..e8e678b 100644
--- a/lib/make/mb_msxhub.mk
+++ b/lib/make/mb_msxhub.mk
@@ -26,3 +26,10 @@ define mb_msxhub_get_dos2_com
 	$(call mb_msxhub_file,$(1)/COMMAND2.COM,$(MB_MSXHUB_API)/MSXDOS2/2.20-1/get/MSXDOS2/COMMAND2.COM)
 endef
 
+define mb_msxhub_get_macro80
+	$(call mb_msxhub_file,$(1)/CREF80.COM,$(MB_MSXHUB_API)/MACRO80/2.0-1/get/MACRO80/CREF80.COM)
+	$(call mb_msxhub_file,$(1)/L80.COM,$(MB_MSXHUB_API)/MACRO80/2.0-1/get/MACRO80/L80.COM)
+	$(call mb_msxhub_file,$(1)/LIB80.COM,$(MB_MSXHUB_API)/MACRO80/2.0-1/get/MACRO80/LIB80.COM)
+	$(call mb_msxhub_file,$(1)/M80.COM,$(MB_MSXHUB_API)/MACRO80/2.0-1/get/MACRO80/M80.COM)
+endef
+
diff --git a/lib/make/mb_openmsx.mk b/lib/make/mb_openmsx.mk
index 2431f6e..36416a5 100644
--- a/lib/make/mb_openmsx.mk
+++ b/lib/make/mb_openmsx.mk
@@ -3,7 +3,8 @@ MB_OPENMSX_BOOT_TIMEOUT ?= 25
 MB_OPENMSX_MACHINE      ?= Philips_NMS_8250
 MB_OPENMSX_JOYPORTA     ?=
 MB_OPENMSX_JOYPORTB     ?=
-MB_OPENMSX_SETTING      ?= $(PATH_MSXBUILD)/lib/openmsx/boot_settings.xml
+# Workaround for include msxbuild.mk file and 'older' openmsx segfaults on relative settings path.
+MB_OPENMSX_SETTING      := $(if $(realpath $(PATH_MSXBUILD)),$(realpath $(PATH_MSXBUILD)),$(PATH_MSXBUILD))/lib/openmsx/boot_settings.xml
 MB_OPENMSX_EXTS         ?=
 MB_OPENMSX_EXTRA_MEM    ?= -ext ram4mb
 MB_OPENMSX_ARGS = \
diff --git a/lib/make/msxbuild.mk b/lib/make/msxbuild.mk
index a2504dd..bd39ef8 100644
--- a/lib/make/msxbuild.mk
+++ b/lib/make/msxbuild.mk
@@ -5,6 +5,7 @@
 # Setup required tools paths
 PATH_HEX2BIN     ?= /usr/bin
 PATH_SDCC        ?= /usr/bin
+PATH_UNIX2DOS    ?= /usr/bin
 PATH_OPENMSX     ?= /usr/bin
 PATH_MSXBUILD    ?= $(dir $(lastword $(MAKEFILE_LIST)))../..
 
@@ -13,5 +14,4 @@ include $(PATH_MSXBUILD)/lib/make/mb_base.mk
 include $(PATH_MSXBUILD)/lib/make/mb_autoexec.mk
 include $(PATH_MSXBUILD)/lib/make/mb_msxhub.mk
 include $(PATH_MSXBUILD)/lib/make/mb_openmsx.mk
-include $(PATH_MSXBUILD)/lib/make/mb_assert.mk
 include $(PATH_MSXBUILD)/lib/make/mb_build.mk
diff --git a/test/ahello-m80/0module.mk b/test/ahello-m80/0module.mk
new file mode 100644
index 0000000..2d3518b
--- /dev/null
+++ b/test/ahello-m80/0module.mk
@@ -0,0 +1,33 @@
+
+TEST_AHELLO_M80  := $(PATH_BIN)/test/ahello-m80
+BUILD_HELP        += \\n\\t* $(TEST_AHELLO_M80)/ahello.com\\n\\t* test-ahello-m80-run\\n\\t* test-ahello-m80-assert
+
+$(TEST_AHELLO_M80):
+	$(call mb_mkdir,$(TEST_AHELLO_M80))
+	$(call mb_msxhub_get_macro80,$(TEST_AHELLO_M80))
+
+$(TEST_AHELLO_M80)/%.mac: test/ahello-m80/%.mac | $(TEST_AHELLO_M80)
+	$(call mb_unix2dos,$<,$@)
+
+$(TEST_AHELLO_M80)/ahello.rel: $(TEST_AHELLO_M80)/ahello.mac
+	$(call mb_autoexec_cmd,$(TEST_AHELLO_M80),m80 =ahello/Z)
+	$(call mb_openmsx_dos2,$(TEST_AHELLO_M80))
+	
+$(TEST_AHELLO_M80)/ahello.hex: $(TEST_AHELLO_M80)/ahello.rel
+	$(call mb_autoexec_cmd,$(TEST_AHELLO_M80),l80 ahello$(MB_COMMA)ahello/N/X/Y/E)
+	$(call mb_openmsx_dos2,$(TEST_AHELLO_M80))
+
+$(TEST_AHELLO_M80)/ahello.com: $(TEST_AHELLO_M80)/ahello.hex
+	$(call mb_hex2com,$(TEST_AHELLO_M80)/ahello.hex,$(TEST_AHELLO_M80)/ahello.com)
+
+.PHONY: test-ahello-m80-run
+test-ahello-m80-run: $(TEST_AHELLO_M80)/ahello.com
+	$(call mb_autoexec_open_gui,$(TEST_AHELLO_M80))
+	$(call mb_openmsx_dos2,$(TEST_AHELLO_M80))
+
+.PHONY: test-ahello-m80-assert
+test-ahello-m80-assert: $(TEST_AHELLO_M80)/ahello.com
+	$(call mb_delete,$(TEST_AHELLO_M80)/test.out)
+	$(call mb_autoexec_cmd_test,$(TEST_AHELLO_M80),ahello > test.out)
+	$(call mb_openmsx_dos2,$(TEST_AHELLO_M80))
+	grep "M80: Hello world..." $(TEST_AHELLO_M80)/test.out
diff --git a/test/ahello-m80/ahello.mac b/test/ahello-m80/ahello.mac
new file mode 100644
index 0000000..4e477c7
--- /dev/null
+++ b/test/ahello-m80/ahello.mac
@@ -0,0 +1,20 @@
+	title	M80 CP/M Hello world
+.Z80
+
+WRITESTR	EQU		9h
+BDOS		EQU		5h
+
+ASEG
+ORG			0100H
+
+MAIN:
+	LD		C,WRITESTR
+	LD		DE,TXT_HELLO
+	CALL	BDOS
+	RET
+	
+TXT_HELLO:
+	DB "M80: Hello world...$"
+
+END
+DSEG
diff --git a/test/ahello-sdcc/0module.mk b/test/ahello-sdcc/0module.mk
new file mode 100644
index 0000000..61c2be6
--- /dev/null
+++ b/test/ahello-sdcc/0module.mk
@@ -0,0 +1,27 @@
+
+TEST_AHELLO_SDCC  := $(PATH_BIN)/test/ahello-sdcc
+BUILD_HELP        += \\n\\t* $(TEST_AHELLO_SDCC)/ahello.com\\n\\t* test-ahello-sdcc-run\\n\\t* test-ahello-sdcc-assert
+
+$(TEST_AHELLO_SDCC):
+	$(call mb_mkdir,$(TEST_AHELLO_SDCC))
+
+$(TEST_AHELLO_SDCC)/%.rel: test/ahello-sdcc/%.asm | $(TEST_AHELLO_SDCC)
+	$(call mb_compile_asm,$@,$<)
+
+$(TEST_AHELLO_SDCC)/ahello.hex: $(TEST_AHELLO_SDCC)/ahello.rel
+	$(call mb_link_asm_dos,$(TEST_AHELLO_SDCC)/ahello.hex,$(TEST_AHELLO_SDCC)/ahello.rel)
+
+$(TEST_AHELLO_SDCC)/ahello.com: $(TEST_AHELLO_SDCC)/ahello.hex
+	$(call mb_hex2com,$(TEST_AHELLO_SDCC)/ahello.hex,$(TEST_AHELLO_SDCC)/ahello.com)
+
+.PHONY: test-ahello-sdcc-run
+test-ahello-sdcc-run: $(TEST_AHELLO_SDCC)/ahello.com
+	$(call mb_autoexec_open_gui,$(TEST_AHELLO_SDCC))
+	$(call mb_openmsx_dos2,$(TEST_AHELLO_SDCC))
+
+.PHONY: test-ahello-sdcc-assert
+test-ahello-sdcc-assert: $(TEST_AHELLO_SDCC)/ahello.com
+	$(call mb_delete,$(TEST_AHELLO_SDCC)/test.out)
+	$(call mb_autoexec_cmd_test,$(TEST_AHELLO_SDCC),ahello > test.out)
+	$(call mb_openmsx_dos2,$(TEST_AHELLO_SDCC))
+	grep "SDCC: Hello world..." $(TEST_AHELLO_SDCC)/test.out
diff --git a/test/ahello/ahello.asm b/test/ahello-sdcc/ahello.asm
similarity index 94%
rename from test/ahello/ahello.asm
rename to test/ahello-sdcc/ahello.asm
index 9146d2b..5a36e8b 100644
--- a/test/ahello/ahello.asm
+++ b/test/ahello-sdcc/ahello.asm
@@ -31,7 +31,7 @@ PUT_TXT:
 	JR		PUT_TXT
 
 TXT_HELLO:
-	.str	"Hello world..."
+	.str	"SDCC: Hello world..."
 	.db		0x1D
 
 TXT_HELLO_SRC:
diff --git a/test/ahello/0module.mk b/test/ahello/0module.mk
deleted file mode 100644
index b41dfb0..0000000
--- a/test/ahello/0module.mk
+++ /dev/null
@@ -1,33 +0,0 @@
-
-ASM_HELLO_NAME    := ahello
-ASM_HELLO_RUN     := run-$(ASM_HELLO_NAME)
-ASM_HELLO_TEST    := test-$(ASM_HELLO_NAME)
-ASM_HELLO_SRC     := test/$(ASM_HELLO_NAME)
-ASM_HELLO_BIN     := $(PATH_BIN)/test/$(ASM_HELLO_NAME)
-ASM_HELLO_HEX     := $(ASM_HELLO_BIN)/$(ASM_HELLO_NAME).hex
-ASM_HELLO_COM     := $(ASM_HELLO_BIN)/$(ASM_HELLO_NAME).com
-ASM_HELLO_RELS    := $(ASM_HELLO_BIN)/$(ASM_HELLO_NAME).rel
-ASM_HELLO_CODE    := $(ASM_HELLO_SRC)/$(ASM_HELLO_NAME).asm
-BUILD_HELP        += \\n\\t* $(ASM_HELLO_COM)\\n\\t* $(ASM_HELLO_RUN)\\n\\t* $(ASM_HELLO_TEST) \(Change txt in hello.asm and run again\)
-
-$(ASM_HELLO_BIN):
-	$(call mb_mkdir,$(ASM_HELLO_BIN))
-
-$(ASM_HELLO_BIN)/%.rel: $(ASM_HELLO_SRC)/%.asm | $(ASM_HELLO_BIN)
-	$(call mb_compile_asm,$@,$<)
-
-$(ASM_HELLO_HEX): $(ASM_HELLO_RELS)
-	$(call mb_link_asm_dos,$(ASM_HELLO_HEX),$(ASM_HELLO_RELS))
-
-$(ASM_HELLO_COM): $(ASM_HELLO_HEX)
-	$(call mb_hex2com,$(ASM_HELLO_HEX),$(ASM_HELLO_COM))
-
-$(ASM_HELLO_RUN): $(ASM_HELLO_COM)
-	$(call mb_autoexec_open_gui,$(ASM_HELLO_BIN))
-	$(call mb_openmsx_dos2,$(ASM_HELLO_BIN))
-
-$(ASM_HELLO_TEST): $(ASM_HELLO_COM)
-	$(call mb_delete,$(ASM_HELLO_BIN)/test.out)
-	$(call mb_autoexec_cmd_test,$(ASM_HELLO_BIN),$(ASM_HELLO_NAME) > test.out)
-	$(call mb_openmsx_dos2,$(ASM_HELLO_BIN))
-	$(call mb_assert_file_equals,$(ASM_HELLO_BIN)/test.out,Hello world...from asm.)