Turbo Prolog

less than or greater than zero, a border is drawn around the defined area (i.e. the
window is framed) and the upper border line will include the Header text. Once
defined, the window is "cleared" and the cursor is moved to its top left corner. The
row and column positions of the left corner of the window-relative to the whole
screen-are specified by parameters Rowand Col, respectively, and Height and Width
give the dimensions of the window. It is important that Row, Col, Height and Width be
compatible with the size of the display-normally 25 rows of 80 characters. The size of
the display can be changed using the graphics standard predicate.
membyte(Segment, Offset,Byte)
(integer,integer,integer) : (i,i,i) (i,i,o)
(1,1,1)
When Byte is bound, membyte stores the value of the Byte at the memory address
given by Segment and Offset (calculated as Segment* 16 + Offset).
(1,1,0)
When Byte is free, membyte reads the value of the byte at the memory address given
by Segment and Offset (calculated as Segment* 16+0ffset).
memword(Segment, Offset, Word)
(integer,integer,integer) : (i,i,i) (i,i,o)
(1,1,1)
When Word is bound, memword stores the value of the Word at the memory address
given by Segment and Offset (calculated as Segment* 16 + Offset).
(1,1,0)
When Word is free, memword reads the value of the word at the memory address
given by Segment and Offset (calculated as Segment* 16 + Offset). (Values in the range
32768 to 65536 are taken as negative integers).
nl
Causes a carriage-return, line-feed sequence to be sent to the current writedevice.
not(atom»)
Succeeds if (atom) represents a goal that fails when evaluated.
openappend(SymbolicFileName, DosFileName) (file,string): (i,i)
Opens the disk file DosFileName for appending, and attaches the SymbolicFileName to
that file for future reference within the Turbo Prolog program containing this call.
openmodify(SymbolicFileName,DosFileName) (file,string) : (i,i)
Opens the disk file DosFileName for both reading and writing, and attaches the
SymbolicFileName to that file for future reference within the Turbo Prolog program
Reference Guide 189