
			dr-11b dma driver
			-----------------

   dr.c is the source for the dma driver. it should be placed in
/usr/sys/dmr. compile it with the "-c -O" option and
place dr.o in /usr/sys/lib2. print the c.c file to see what had
to be added, and add the same thing to your c.c file (look at the
lines with /* dr */ ). l.s will also have to be changed
to include the new information about the dr-11b.

note: there are two forms of the dr-11b-- rdr and dr. in the
c.c file we defined the dr-11b just like disk or magtape. there
is a raw version and a block version. use the raw version. the
block version was implemented for experimental reasons. you
may change the c.c file to get rid of the block version, or
just don't make a node for it.

after adding dr.o to the library, reload the system:

ld -x l.o m40.o c.o ../lib1 ../lib2  (for example)
mv a.out /unix

then use /etc/mknod to make the files in /dev
the major device numbers will be the line numbers in the c.c file
	(starting from zer0) of the lines that you added.
remember :   the first one is the block device
	     the second is the raw device


-----------------------------

anybody wanting a ploting package for a houston instrument 2000
plotter that works through 0-10 v d/a may contact me for a copy.


				questions and comments welcome,

				arturo j. harlan
				glennan 209d
				mechanical & aerospace engineering
				case western reserve university
				cleveland, ohio 44106

				(216)-368-4164

