This message announces the availability of Scheme release scm4a12.

SCM4a12 now GCs and frees all of its malloced storage before exiting.
A function RESTART is also provided which GCs and frees all storage
and then restarts SCM.  This behavior should allow porting to
MSWindows.

ISATTY? has been added.  The printing of the prompt is now controlled
by (VERBOSE) and initially off if stdin or stdout is not ISATTY?.

A problem with user defined interrupt handlers has been fixed.
Interrupt handlers now seem to be working well enough to run the
lightweight multiprocessing code in slib1b11/process.scm.

From hugh@ear.MIT.EDU (Hugh Secker-Walker): Syntax forms are now
memoized so that syntax checks are done only once.  Full syntax
checking is now done.  Interpreter is now smaller and faster and uses
less stack space.  Modifications to code are now made under DEFER_INTS
as they always should have been.

Scm conforms to Revised^4 Report on the Algorithmic Language Scheme
and the IEEE P1178 specification.  Scm is written in C and runs under
Amiga, Atari-ST, MacOS, MS-DOS, NOS/VE, VMS, Unix and similar systems.
ASCII and EBCDIC are supported.

Documentation is included explaining the many Scheme Language
extensions in scm, the internal representation and how to extend or
include scm in other programs.

SCM can be obtained via FTP (detailed instructions follow) from:
altdorf.ai.mit.edu:archive/scm/scm4a12.tar.Z
nexus.yorku.ca:pub/scheme/new/scm4a12.tar.Z

SLIB is a portable scheme library which SCM uses:
altdorf.ai.mit.edu:archive/scm/slib1b11.tar.Z
nexus.yorku.ca:pub/scheme/new/slib1b11.tar.Z

  ftp altdorf.ai.mit.edu [18.43.0.246] (anonymous)
  bin
  cd archive/scm
  get scm4a12.tar.Z
  get slib1b11.tar.Z
or
  ftp nexus.yorku.ca (anonymous)
  bin
  cd pub/scheme/new
  get scm4a12.tar.Z
  get slib1b11.tar.Z

`scm4a12.tar.Z' is a compressed tar file of the C code distribution.
`slib1b11.tar.Z' is a compressed tar file of a Scheme Library.

Remember to use binary mode when transferring the *.tar.Z files.
Be sure to get and read the GNU General Public License (COPYING).
It is included in scm4a12.tar.Z.

To receive an IBM PC floppy disk with the source files and MSDOS
and i386 MSDOS executables send $60 to
   Aubrey Jaffer, 84 Pleasant St. Wakefield MA 01880, USA.
Net 30 day purchase orders are minimum $100.

If you like scm you can support the developement and maintainence of
it by buying a disk from me or by sending money to the above address.
Money received will also help speed the release of a free symbolic
mathematics system (written in scheme).
