4th_86 v3.03 M.F.Buchan                  REGISTRATION $25.00
FORTH LANGUAGES ASSEMBLT BUCHAN UCC

New Release

4th_86 is  an MSDOS-EGA based  FORTH with all  the irritating
fetishes beloved by "Forth purists"  removed.  It was written
specifically to  introduce the  concepts of  FORTH to  Higher
Diploma  Polytechnic  students,  and   the  documentation  is
largely tutorial in  nature.  Despite being designed  to make
FORTH  more  palatable  to  newcomers,   4th_86  is  a  fully
functional implementation.   Many graphics  demonstration COM
files are  included along with a  great deal of MASM  and 4th
source code.

File structures are standard MSDOS  accessed via DOS handles.
Source  files are  edited by  shelling  to your  conventional
MSDOS editor.  4th_86 does  ** NOT ** in ANY way  use the old
fashioned "Forth screen  files", and needs no  inbuilt editor
or customised printer utilities.   4th_86 is Direct Threaded,
and runs as a COM file in 64K of memory.

Both FORTH and  ASSEMBLY source can be  loaded.  The Assembly
routines CAN be  written "in-line" but 4th_86  is designed to
allow standard ASM format files to  be assembled with MASM to
a  BIN  file  and  then  binary   loaded.   This  -  and  the
essentially modular  concept of FORTH  itself -  encourages a
structured approach.

Extensive debugging; tracing; and disassembly features are an
essential part  of the design.   Loaded code can  be patched,
and re-defined  words can be  "linked" to  replace previously
defined  words.   Both   MASM  and  FORTH  routines   can  be
disassembled.

Most  DOS functions  can  be  accessed directly  from  within
4th_86  although  it is  possible  to  shell  out to  DOS  if
required.  Paths and subdirectories are implemented.

As user routines are added, the  extended system can be saved
to disk at any time.  Alternatively,  IMAGE files of the user
application  can  be  saved  and   quickly  re-loaded  as  an
alternative to  re-threading the original source.   Turnkey [
meta-compiled ] COM files can also be saved to disk.

UCC   4th  was   originally  marketed   by  United   Controls
Corporation, Alabama,  in 1982,  for 8-bit  hardware.  United
Controls Corporation  have kindly  given permission  for this
MSDOS re-write  and extension  to be  released to  the Public
Domain.

Hardware Requirements: IBM compatible   
                       preferably EGA graphics and hard disk

Other Requirements:    DOS 3.2 or higher