The current Dreams project implements the Dreams system as an
extension to LMI UR/Forth 1.03 [Dun87]. It has also been
ported to LMI UR/Forth-386 [Dun91]. UR/Forth uses a direct
threaded interpreter with a 16 bit cell size in the segmented real
mode address space of an IBM-PC compatible running MS-DOS.
UR/Forth-386 uses direct threading with a 32 bit cell size in the
linear protect mode address space of an 80386 under MS-DOS with the
Pharr-Lapp DOS extender. Appendix D
(p ) contains the source code for the UR/Forth
Dreams implementation.