diff --git a/sdk/Makefile b/sdk/Makefile
index c05395e..71c193f 100644
--- a/sdk/Makefile
+++ b/sdk/Makefile
@@ -7,18 +7,30 @@
 #   * GNU on Windows NT (using MinGW/MSYS/Cygwin/WSL)
 #
 # Build:
-#   make [BUILD=<BUILD>] [FORCEBUILD=<FB_FLAG>] [<TARGET>]
+#   make [<FLAGS>] build | build-<TARGET>
+# Install:
+#   make [<FLAGS>] [all | <TARGET> | install-<TARGET>]
+# Uninstall:
+#   make [<FLAGS>] uninstall | uninstall-<TARGET>
 # Clean:
-#   make [BUILD=<BUILD>] [FORCECLEAN=<FC_FLAG>] clean
+#   make [<FLAGS>] clean | clean-<TARGET>
+#   make [<FLAGS>] distclean | distclean-<TARGET>
 #
 # where:
+#   <FLAGS> are these flags:
+#     [BUILD=<BUILD>] [FORCEBUILD=<FB_FLAG>] [FORCECLEAN=<FC_FLAG>]
+# where values are:
 #   <BUILD> - see included `common.mk'.
 #   <FB_FLAG> is 1 to force build, otherwise do not (default).
 #   <FC_FLAG> is 1 to force clean, otherwise do not (default).
-#   <TARGET> is one of: sjasmplus, z88dk, zx7b, tools
+#   <TARGET> is one of the values of `TARGETS' variable.
+#
+# NOTE: `FORCEBUILD' and `FORCECLEAN' are mainly for Windows platform.
 
 include common.mk
 
+prefix	?= .
+
 ifeq ($(BUILD),mingw32)
 FORCEBUILD:=1
 else ifeq ($(BUILD),mingw64)
@@ -40,13 +52,18 @@ export BUILD
 export FORCEBUILD
 export FORCECLEAN
 
+TARGETS=sjasmplus z88dk zx7b tools
+
 .PHONY: all
-all: sjasmplus z88dk zx7b tools
+all: install
 
-.PHONY: sjasmplus z88dk zx7b tools
-sjasmplus z88dk zx7b tools: | src
-	$(MAKE) -w -C $| install-$@
+.PHONY: $(TARGETS)
+$(TARGETS): | src
+	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) install-$@
 
-.PHONY: clean dist-clean
-clean dist-clean: | src
-	$(MAKE) -w -C $| $@
+.PHONY:\
+ build install uninstall clean distclean\
+ $(foreach t,$(TARGETS),build-$(t) install-$(t) uninstall-$(t) clean-$(t) distclean-$(t))
+build install uninstall clean distclean \
+$(foreach t,$(TARGETS),build-$(t) install-$(t) uninstall-$(t) clean-$(t) distclean-$(t)): | src
+	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) $@
diff --git a/sdk/README.md b/sdk/README.md
index 0d41baa..14216d5 100644
--- a/sdk/README.md
+++ b/sdk/README.md
@@ -40,6 +40,8 @@ Open terminal and type:
 # apt install -y build-essential git
 ```
 
+to install `build-essential` and `git` packages.
+
 **NOTE**: here the first symbol "#" means that the following command must be run as *root* or using `sudo` utility.
 
 Additional packages for targets:
@@ -49,11 +51,7 @@ Target | Packages
 `sjasmplus` | cmake libboost-all-dev libxml2-dev
 `z88dk` | dos2unix libboost-all-dev texinfo texi2html libxml2-dev subversion bison flex zlib1g-dev m4
 
-To use cross-compilation for Windows platform install *mingw-w64* package:
-
-```
-# apt install -y mingw-w64
-```
+To use cross-compilation for Windows platform install *mingw-w64* package.
 
 ### 2.1.2. Clone repository
 
@@ -71,10 +69,10 @@ Go to the project's root directory, enter `sdk` sub-directory and type one of th
 
 Command | Description
 ----|----
-`make` | Build all tools from sources
-`make <TARGET>` | Build only the TARGET from sources
-`make BUILD=<BUILD>` | Cross-build all tools from sources for Windows platform
-`make BUILD=<BUILD> <TARGET>` | Cross-build only the TARGET from sources for Windows platform
+`make` | Build and install all tools from sources
+`make <TARGET>` | Build and install only the TARGET from sources
+`make BUILD=<BUILD>` | Cross-build and install all tools from sources for Windows platform
+`make BUILD=<BUILD> <TARGET>` | Cross-build and install only the TARGET from sources for Windows platform
 
 where:
 
@@ -90,6 +88,8 @@ Value of `BUILD` | Target system
 `mingw32` | Windows with i686 architecture (32-bits)
 `mingw64` | Windows with AMD64 architecture (64-bits)
 
+Compiled binaries are installed into `bin` sub-directory.
+
 Example:
 
 ```bash
@@ -102,24 +102,24 @@ Then you may use `strip` tool to strip debug information from file and thus shri
 strip bin/*.exe
 ```
 
+For more options see [`Makefile`](Makefile).
+
 ## 2.3. Clean tools
 
 Go to the project's root directory, enter `sdk` sub-directory and type one of the following commands:
 
 Command | Description
 ----|----
+`make uninstall` | remove installed binaries
 `make clean` | clean after compilation from sources
-`make dist-clean` | acts like `clean` but also removes temporary and downloaded files
+`make distclean` | acts like `clean` but also remove temporary and downloaded files
+`make BUILD=<BUILD> uninstall` | remove installed binaries for Windows platform
 `make BUILD=<BUILD> clean` | clean after compilation from sources for Windows platform
-`make BUILD=<BUILD> dist-clean` | acts like `clean` for Windows platform but also removes temporary and downloaded files
+`make BUILD=<BUILD> distclean` | acts like `clean` for Windows platform but also remove temporary and downloaded files
 
 Value of `BUILD` is described in [2.2](#22-build-tools).
 
-Example:
-
-```bash
-make BUILD=mingw64 clean
-```
+For more options see [`Makefile`](Makefile).
 
 ## 2.4. Tools usage
 
@@ -190,19 +190,19 @@ Go to the project's root directory, enter `sdk` sub-directory and type one of th
 
 Command | Description
 ----|----
-`make` | Quick setup of all tools
-`make <TARGET>` | Qucik setup of the TARGET only
-`make FORCEBUILD=1` | Build all tools from sources
-`make FORCEBUILD=1 <TARGET>` | Build only the TARGET from sources
+`make` | **Quick setup** of all tools (download precompiled binaries and install them)
+`make <TARGET>` | **Qucik setup** of the TARGET only
+`make FORCEBUILD=1` | Build and install all tools from sources
+`make FORCEBUILD=1 <TARGET>` | Build and install only the TARGET from sources
 
 where:
 
-Value of `TARGET` | Origin | Quick setup | Build from sources
+Value of `TARGET` | Sources origin | Binaries origin (**Quick setup**) | Build from sources
 ----|----|----|----
-`sjasmplus` | downloaded | available | available
-`z88dk` | downloaded | available | available
-`zx7b` | `src/zx7b` | N/A | available
-`tools` | `src/tools` | N/A | available
+`sjasmplus` | downloaded | downloaded (**yes**) | available
+`z88dk` | downloaded | downloaded (**yes**) | available
+`zx7b` | local | precompiled locally (**no**) | available
+`tools` | local | precompiled locally (**no**) | available
 
 Then you may use `strip` tool to strip debug information from file and thus shrink file's size. Example:
 
@@ -210,22 +210,22 @@ Then you may use `strip` tool to strip debug information from file and thus shri
 strip bin/*.exe
 ```
 
+For more options see [`Makefile`](Makefile).
+
 ## 3.3. Clean tools
 
 Go to the project's root directory, enter `sdk` sub-directory and type one of the following commands:
 
 Command | Description
 ----|----
-`make clean` | removes downloaded precompiled binaries only
-`make dist-clean` | acts as `clean` but also removes temporary and downloaded files
-`make FORCECLEAN=1 clean` | clean after compilation from sources
-`make FORCECLEAN=1 dist-clean` | acts as forced `clean` but also removes temporary and downloaded files
+`make FORCECLEAN=1 uninstall` | remove installed binaries from SDK after quick setup
+`make FORCECLEAN=1 clean` | clean sources from downloaded binaries after quick setup
+`make FORCECLEAN=1 distclean` | acts as forced `clean` but also removes temporary and downloaded files
+`make FORCEBUILD=1 FORCECLEAN=1 uninstall` | remove all installed binaries from SDK
+`make FORCEBUILD=1 FORCECLEAN=1 clean` | clean SDK after compilation from sources
+`make FORCEBUILD=1 FORCECLEAN=1 distclean` | acts as forced `clean` after compilation from sources but also removes temporary and downloaded files
 
-Example:
-
-```bash
-make FORCECLEAN=1 clean
-```
+For more options see [`Makefile`](Makefile).
 
 ## 3.4. Tools usage
 
diff --git a/sdk/src/Makefile b/sdk/src/Makefile
index 321e818..90b0c39 100644
--- a/sdk/src/Makefile
+++ b/sdk/src/Makefile
@@ -7,19 +7,25 @@
 #   * GNU on Windows NT (using MinGW/MSYS/Cygwin/WSL)
 #
 # Build:
-#   make [BUILD=<BUILD>] [FORCEBUILD=<FB_FLAG>] [install-<TARGET>]
+#   make [<FLAGS>] build | build-<TARGET>
+# Install:
+#   make [<FLAGS>] [all | install | install-<TARGET>]
+# Uninstall:
+#   make [<FLAGS>] uninstall | uninstall-<TARGET>
 # Clean:
-#   make [BUILD=<BUILD>] [FORCECLEAN=<FC_FLAG>] clean|dist-clean
+#   make [<FLAGS>] clean | clean-<TARGET>
+#   make [<FLAGS>] distclean | distclean-<TARGET>
 #
 # where:
+#   <FLAGS> are:
+#     [BUILD=<BUILD>] [FORCEBUILD=<FB_FLAG>] [FORCECLEAN=<FC_FLAG>]
+# where values are:
 #   <BUILD> - see included `common.mk'.
 #   <FB_FLAG> is 1 to force build, otherwise do not (default).
 #   <FC_FLAG> is 1 to force clean, otherwise do not (default).
-#   <TARGET> is one of:
-#     * sjasmplus
-#     * z88dk
-#     * zx7b
-#     * tools
+#   <TARGET> is one of the values of `TARGETS' variable.
+#
+# NOTE: `FORCEBUILD' and `FORCECLEAN' are mainly for Windows platform.
 
 include ../common.mk
 
@@ -30,12 +36,19 @@ bindir		?= $(exec_prefix)/bin
 INSTALL		?= install
 INSTALL_PROGRAM	?= $(INSTALL)
 
-.PHONY: all
-all:\
- install-sjasmplus\
- install-z88dk\
- install-zx7b\
- install-tools
+TARGETS=\
+ sjasmplus\
+ z88dk\
+ zx7b\
+ tools
+
+.PHONY: all build install uninstall clean distclean
+all: install
+build: $(foreach t,$(TARGETS),build-$(t))
+install: $(foreach t,$(TARGETS),install-$(t))
+uninstall: $(foreach t,$(TARGETS),uninstall-$(t))
+clean: $(foreach t,$(TARGETS),clean-$(t))
+distclean: $(foreach t,$(TARGETS),distclean-$(t))
 
 _DoBuild:=1
 _UsePrecompiledOnWindows:=0
@@ -56,12 +69,12 @@ endif
 
 # sjasmplus
 
-.PHONY: install-sjasmplus clean-sjasmplus
+.PHONY: $(foreach a,build install uninstall clean distclean,$(a)-sjasmplus)
 
 ifeq ($(_DoBuild),1)
 
-install-sjasmplus: | sjasmplus/.extracted sjasmplus.mk
-	$(MAKE) -w -C sjasmplus -f ../sjasmplus.mk prefix=$(shell realpath --relative-to=sjasmplus $(prefix)) install
+build-sjasmplus: | sjasmplus/.extracted sjasmplus.mk
+	$(MAKE) -w -C sjasmplus -f ../sjasmplus.mk prefix=$(shell realpath --relative-to=sjasmplus $(prefix))
 
 sjasmplus/.extracted: sjasmplus-src.tgz
 	echo 'f3f6d28af19880ed2cb427b6b427e9bd42371929c7d263dac840fb71de1302d6  $<' >$<.sha256
@@ -75,18 +88,31 @@ sjasmplus/.extracted: sjasmplus-src.tgz
 sjasmplus-src.tgz:
 	wget -c https://github.com/sjasmplus/sjasmplus/archive/refs/tags/20190306.1.tar.gz -O $@
 
-clean-sjasmplus: | sjasmplus.mk
-	if test -d sjasmplus; then $(MAKE) -w -C sjasmplus -f ../sjasmplus.mk clean; fi
-	if test -d sjasmplus; then $(MAKE) -w -C sjasmplus -f ../sjasmplus.mk prefix=$(shell realpath --relative-to=sjasmplus $(prefix)) uninstall; fi
+install-sjasmplus: | sjasmplus/.extracted sjasmplus.mk
+	$(MAKE) -w -C sjasmplus -f ../sjasmplus.mk prefix=$(shell realpath --relative-to=sjasmplus $(prefix)) install
 
-endif
+ifeq ($(_DoClean),1)
+
+uninstall-sjasmplus: | sjasmplus.mk
+	if test -f sjasmplus; then\
+		$(MAKE) -w -C sjasmplus -f ../sjasmplus.mk prefix=$(shell realpath --relative-to=sjasmplus $(prefix)) uninstall;\
+	else\
+		rm -f $(DESTDIR)$(bindir)/sjasmplus$(EXESUFFIX);\
+	fi
+
+clean-sjasmplus: | sjasmplus.mk
+	if test -f sjasmplus; then $(MAKE) -w -C sjasmplus -f ../sjasmplus.mk clean; fi
+
+else	#  !_DoClean
+
+uninstall-sjasmplus clean-sjasmplus:;
+
+endif	#  !_DoClean
+endif	# _DoBuild
 
 ifeq ($(_UsePrecompiledOnWindows),1)
 
-install-sjasmplus: $(DESTDIR)$(bindir)/sjasmplus$(EXESUFFIX)
-
-$(DESTDIR)$(bindir)/sjasmplus$(EXESUFFIX): sjasmplus/sjasmplus$(EXESUFFIX)
-	$(INSTALL_PROGRAM) $< $@
+build-sjasmplus: sjasmplus/sjasmplus$(EXESUFFIX)
 
 sjasmplus/sjasmplus$(EXESUFFIX): | sjasmplus/.extracted
 
@@ -112,16 +138,29 @@ sjasmplus-win32.7z:
 sjasmplus-win64.7z:
 	wget -c https://github.com/sjasmplus/sjasmplus/releases/download/20190306.1/sjasmplus-win64-20190306.1.7z -O $@
 
+install-sjasmplus: $(DESTDIR)$(bindir)/sjasmplus$(EXESUFFIX)
+
+$(DESTDIR)$(bindir)/sjasmplus$(EXESUFFIX): sjasmplus/sjasmplus$(EXESUFFIX)
+	$(INSTALL_PROGRAM) $< $@
+
+ifeq ($(_DoClean),1)
+
+uninstall-sjasmplus:
+	rm -f $(DESTDIR)$(bindir)/sjasmplus$(EXESUFFIX)
+
 clean-sjasmplus:
 	rm -rf sjasmplus
-	rm -f $(DESTDIR)$(bindir)/sjasmplus$(EXESUFFIX)
 
-endif
+else	#  !_DoClean
 
-.PHONY: distclean-sjasmplus
-distclean-sjasmplus:
-	rm -rf sjasmplus
-	rm -f $(DESTDIR)$(bindir)/sjasmplus$(EXESUFFIX)
+uninstall-sjasmplus clean-sjasmplus:;
+
+endif	#  !_DoClean
+endif	# _UsePrecompiledOnWindows
+
+ifeq ($(_DoClean),1)
+
+distclean-sjasmplus: clean-sjasmplus
 	rm -f\
  sjasmplus-src.tgz\
  sjasmplus-src.tgz.sha256\
@@ -130,11 +169,17 @@ distclean-sjasmplus:
  sjasmplus-win64.7z\
  sjasmplus-win64.7z.sha256
 
+else	# !_DoClean
+
+distclean-sjasmplus:;
+
+endif	# !_DoClean
+
 # z88dk
 
-.PHONY: install-z88dk clean-z88dk
+.PHONY: $(foreach a,build install uninstall clean distclean,$(a)-z88dk)
 
-Z88DK_TARGETS:=\
+Z88DK_BINS:=\
  asmpp.pl\
  sccz80$(EXESUFFIX)\
  z80asm$(EXESUFFIX)\
@@ -156,7 +201,7 @@ Z88DK_TARGETS:=\
  z88dk-zx7$(EXESUFFIX)\
  zcc$(EXESUFFIX)
 
-install-z88dk: z88dk/.done
+build-z88dk install-z88dk: z88dk/.done
 
 ifeq ($(_DoBuild),1)
 
@@ -167,7 +212,7 @@ endif
 
 z88dk/.done: | z88dk/.extracted z88dk.mk
 	$(MAKE) -w -C z88dk -f ../z88dk.mk
-	cd z88dk/bin && test x $(patsubst %,-a -x %,$(Z88DK_TARGETS))
+	cd z88dk/bin && test x $(patsubst %,-a -x %,$(Z88DK_BINS))
 	touch $@
 
 z88dk/.extracted: z88dk-src.tgz
@@ -182,13 +227,22 @@ z88dk/.extracted: z88dk-src.tgz
 z88dk-src.tgz:
 	wget -c https://github.com/z88dk/z88dk/releases/download/v2.1/z88dk-src-2.1.tgz -O $@
 
+uninstall-z88dk:;
+
+ifeq ($(_DoClean),1)
+
 # This does not work:
 #clean-z88dk: | z88dk.mk
 #	if test -d z88dk; then $(MAKE) -w -C z88dk -f ../z88dk.mk clean && rm -f z88dk/.done; fi
 clean-z88dk:
 	rm -rf z88dk
 
-endif
+else	#  !_DoClean
+
+clean-z88dk:;
+
+endif	#  !_DoClean
+endif	# _DoBuild
 
 ifeq ($(_UsePrecompiledOnWindows),1)
 
@@ -203,84 +257,101 @@ z88dk/.done: z88dk-win32.zip
 z88dk-win32.zip:
 	wget -c https://github.com/z88dk/z88dk/releases/download/v2.1/z88dk-win32-2.1.zip -O $@
 
+uninstall-z88dk:;
+
+ifeq ($(_DoClean),1)
+
 clean-z88dk:
 	rm -rf z88dk
 
-endif
+else	#  !_DoClean
 
-.PHONY: dist-clean-z88dk
-dist-clean-z88dk:
-	rm -rf z88dk
+clean-z88dk:;
+
+endif	#  !_DoClean
+endif	# _UsePrecompiledOnWindows
+
+ifeq ($(_DoClean),1)
+
+distclean-z88dk: clean-z88dk
 	rm -f\
  z88dk-src.tgz\
  z88dk-src.tgz.sha256\
  z88dk-win32.zip\
  z88dk-win32.zip.sha256
 
+else	# !_DoClean
+
+distclean-z88dk:;
+
+endif	# !_DoClean
+
 # zx7b
 
-.PHONY: install-zx7b clean-zx7b distclean-zx7b
+.PHONY: $(foreach a,build install uninstall clean distclean,$(a)-zx7b)
 
 ifeq ($(_DoBuild),1)
 
+build-zx7b: | zx7b
+	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix))
+
 install-zx7b: | zx7b
 	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) install
 
+else	# !_DoBuild
+
+build-zx7b install-zx7b:;
+
+endif	# !_DoBuild
+
+ifeq ($(_DoClean),1)
+
+uninstall-zx7b: | zx7b
+	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) uninstall
+
 clean-zx7b: | zx7b
 	$(MAKE) -w -C $| clean
-	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) uninstall
 
 distclean-zx7b: | zx7b
 	$(MAKE) -w -C $| distclean
-	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) uninstall
 
-else
+else	# !_DoClean
 
-install-zx7b:;
+uninstall-zx7b clean-zx7b distclean-zx7b:;
 
-clean-zx7b:;
-
-distclean-zx7b:;
-
-endif
+endif	# !_DoClean
 
 # tools
 
-.PHONY: install-tools clean-tools distclean-tools
+.PHONY: $(foreach a,build install uninstall clean distclean,$(a)-tools)
 
 ifeq ($(_DoBuild),1)
 
+build-tools: | tools
+	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix))
+
 install-tools: | tools
 	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) install
 
+else	# !_DoBuild
+
+build-tools install-tools:;
+
+endif	# !_DoBuild
+
+ifeq ($(_DoClean),1)
+
+uninstall-tools: | tools
+	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) uninstall
+
 clean-tools: | tools
 	$(MAKE) -w -C $| clean
-	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) uninstall
 
 distclean-tools: | tools
 	$(MAKE) -w -C $| distclean
-	$(MAKE) -w -C $| prefix=$(shell realpath --relative-to=$| $(prefix)) uninstall
 
-else
+else	# !_DoClean
 
-install-tools:;
+uninstall-tools clean-tools distclean-tools:;
 
-clean-tools:;
-
-distclean-tools:;
-
-endif
-
-.PHONY: clean
-ifeq ($(_DoClean),1)
-clean: clean-sjasmplus clean-z88dk clean-zx7b clean-tools
-else
-clean: clean-sjasmplus clean-z88dk
-endif
-
-.PHONY: dist-clean
-ifeq ($(_DoClean),1)
-dist-clean: distclean-sjasmplus dist-clean-z88dk distclean-zx7b distclean-tools
-else
-dist-clean: distclean-sjasmplus dist-clean-z88dk
-endif
+endif	# !_DoClean
diff --git a/sdk/src/z88dk.mk b/sdk/src/z88dk.mk
index 96371c9..c4b31ed 100644
--- a/sdk/src/z88dk.mk
+++ b/sdk/src/z88dk.mk
@@ -9,13 +9,10 @@
 # Build:
 #   make [BUILD=<BUILD>] -w -C z88dk -f ../z88dk.mk
 # Clean:
-#   make [BUILD=<BUILD>] -w -C z88dk -f ../z88dk.mk clean
+#   make [BUILD=<BUILD>] -w -C z88dk -f ../z88dk.mk clean | distclean
 #
 # where:
 #   <BUILD> is one of: mingw32, mingw64.
-#
-# Notes:
-#   BUILD variable may be set in user's environment.
 
 include ../../common.mk
 
@@ -24,7 +21,10 @@ all: | build.sh
 	chmod 777 $|
 	./build.sh
 
-.PHONY: clean
-clean: | build.sh
+.PHONY: install uninstall
+install uninstall:;
+
+.PHONY: clean distclean
+clean distclean: | build.sh
 	chmod 777 $|
 	./build.sh -C