Copy pc86 platform to nes platform, and make change accordingly.

plat/nes/pmfile

@@ -0,0 +1,45 @@
+-- $Source$
+-- $State$
+-- $Revision$
+
+local d = ROOTDIR.."plat/nes/"
+
+include (d.."libsys/pmfile")
+
+local bootsector = ackfile {
+	file (d.."boot.s"),
+	install = pm.install("%BINDIR%lib/nes/boot.o"),
+}
+
+local descr = group {
+	install = pm.install(d.."descr", "%BINDIR%%PLATIND%/%PLATFORM%/descr")
+}
+
+local headers = group {
+	install = {
+		pm.install(d.."include/ack/config.h", "%BINDIR%%PLATIND%/%PLATFORM%/include/ack/config.h"),
+		pm.install(d.."include/unistd.h",     "%BINDIR%%PLATIND%/%PLATFORM%/include/unistd.h"),
+	}
+}
+
+platform_nes = group {
+	ARCH = "6500",
+	PLATFORM = "nes",
+	OPTIMISATION = "-O",
+
+	-- Ensure the descr and headers are installed first because we'll need
+	-- them to build the libraries.
+
+	descr,
+	headers,
+
+	-- Build the back-end support.
+
+	mach_6500,
+	support_6500,
+	lang_runtimes,
+	-- Build the NES library.
+
+	libsys_nes,
+	bootsector
+}