Memory-resident Unix system?

[dan at rna.UUCP]

xyzzy

	You didn't say how much UNIX-glue you needed and on what processor...

	The C Executive is a ROM minimal OS which provides multi-tasking,
simple IPC and other support for C programs running standalone on many
common microprocessors. The C Executive is a product of JMI.
	Another product of the same class is Hunter and Ready's VRTX.
I believe that VRTX has a bit more functionality than the C Executive
and has an optional I/O module. It is not cheap. (415)-326-2950.
	BRL is developing a simple standalone message-passing OS which
currently runs on PDP-11's
	I don't believe any of the above actually look like UNIX to any
degree, though certain equivalences could be made.
	Bell had a number of similar packages which did UNIX system call
compatibility. I don't think they are generally available.

	For PDP-11's, I wrote a simple OS environment which does provide
many of the non-I/O UNIX system calls (including a version of fork()).
It is written in structured assembler and is C compatible. It is possible
to take a UNIX C program and compile it with this package and run that
UNIX program standalone just as the same C source runs on UNIX.

					Cheers,
					Dan Ts'o
					Dept. Neurobiology
					Rockefeller Univ.
					1230 York Ave.
					NY, NY 10021
					212-570-7671
					...cmcl2!rna!dan