Add a rgbds(7) manpage.

Makefile

@@ -52,6 +52,7 @@ install: all
 	@install -s -o root -g bin -m 555 rgbfix ${PREFIX}/bin/rgbfix
 	@install -s -o root -g bin -m 555 rgblink ${PREFIX}/bin/rgblink
 	@install -s -o root -g bin -m 555 rgblib ${PREFIX}/bin/rgblib
+	@install -o root -g bin -m 444 src/rgbds.7 ${PREFIX}/man/cat7/rgbds.7
 	@install -o root -g bin -m 444 src/asm/rgbasm.1 \
 		${PREFIX}/man/cat1/rgbasm.1
 	@install -o root -g bin -m 444 src/fix/rgbfix.1 \

src/rgbds.7

@@ -0,0 +1,25 @@
+.Dd $\&Mdocdate$
+.Dt RGBDS 1
+.Os RGBDS Manual
+.Sh NAME
+.Nm rgbds
+.Nd Rednex Game Boy Development System
+.\" SECTION
+.Sh Examples
+To get a working ROM image from a single assembly source file:
+.Pp
+.D1 $ rgbasm \-o bar.o foo.asm
+.D1 $ rgblink \-o baz.gb bar.o
+.D1 $ rgbfix \-v \-p 0 baz.gb
+.\" SECTION
+.Sh SEE ALSO
+.Xr rgbasm 1 ,
+.Xr rgbfix 1 ,
+.Xr rgblib 1 ,
+.Xr rgblink 1 ,
+.Xr gbz80 7
+.\" SECTION
+.Sh HISTORY
+.Nm
+grew out of the ASMotor package released by Carsten S\(/orensen.
+It was first released as a Game Boy software package by Justin Lloyd.