Routine and function arguments are represented in Appendix A as follows:
I,J,K - integers, not altered by FOG subroutines
IPT1,IPT2 - integers, used to indicate position and type of a
display item (overwritten by FOG subroutines)
IARRAY - an integer array name
L - a logical variable., not altered by the FOG subroutine
T - represents the first location of a FORTRAN HOLLERITH
STRING (can be a real variable, a real array element,
a double integer variable or array element)
[ ] indicate optional arguments.
( ) gives the Subroutine Code Number before the subroutine name.
(a) (101) INTEGER FUNCTION DCHOOS (IARRAY,I)
or SUBROUTINE DCHOOS (IARRAY,I)
The display file whose first element is IARRAY (I) is selected.
Subsequent append-type subroutines use this file. The result is
the number of available locations.
(b) (102) SUBROUTINE DINIT (IARRAY,I)
Execution of the display file, whose first element is IARRAY (I)
is initiated.
(c) (103) SUBROUTINE DCLOSE
The VT15 processor is halted.
(a) (11) SUBROUTINE BLINK (I[,IPT1,IPT2])
I = 0 no blinking, I = 1 blinking on
(b) (12) SUBROUTINE BRITE (I[,IPT1, IPT2])
I is brightness level for subsequent display orders (0-7)
(c) (13) SUBROUTINE DASH (I[,IPT1,IPT2)
I is code for broken lines = 0 unbroken
= 1 6 units on / 2 off
= 2 3 units on / 1 off
= 3 1 unit on / 1 off
(d) (4) SUBROUTINE DRAW (I,IARRAY(J)[,IPT1,IPT2])
I = 0 no SAVE/RESTORE I = 1 SAVE/RESTORE
A subpicture call, referencing the display file whose first element
is IARRAY (J) is added, to the currently selected file.
(e) (0) SUBROUTINE LINE (I,J,K[,IPT1 ,IPT2])
I = x-displacement
J = y-displacement
K = 0 no visible trace K = 1 visible line
(f) (14) SUBROUTINE LPVIS (I[,IPT1,IPT2])
I = 0/1 lightpen sensitivity off/on
(g) (15) SUBROUTINE NAME (I[,IPT1,IPT2])
I is value put in name register of VT15 (0-127)
(h) (16) SUBROUTINE OFEST (I[,IPT1,IPT2])
I = 0/1 offset region unset/set
(i) (17) SUBROUTINE ROT (I[,IPT1,IPT2])
I=0/1 no rotation / 90 degrees anti-clockwise rotation,
(j) (20) SUBROUTINE SCALE (I[,IPT1,IPT2])
I represents the repetition (or scale) factor for subsequent
lines and text (0-15). The actual factor is I+1.
(k) (3) SUBROUTINE SETPT (I,J,K[,IPT1,IPT2])
I is x-coordinate of the new beam position - if I < 0, no x-change
J is y-coordinate of the new beam position - if J < 0, no y-change
K = 0/1 no spot/visible spot
(l) (10) SUBROUTINE SYMB (I[,IPT1,IPT2])
I is the 7-bit ASCII code of the character to be displayed
(m) (1) SUBROUTINE TEXT (T,I[,IPT1,IPT2])
T is the first word of a string of text
J = 0 if string to be unaltered
J > 0 if altmode to be inserted in character position (J+1)
Each of the append-type subroutines has a counterpart insert-type routine in which the display orders are inserted into the currently selected display file at the position indicated by IPT1,IPT2. The code number for each insert routine is the code number of the equivalent append-type subroutine + 408.
For all logical functions in this section the result is the truth value of the statement, The display code required has been successfully inserted.
(a) (51) LOGICAL FUNCTION IBLINK (I,IPT1,IPT2)
or SUBROUTINE IBLINK (I,IPT1,IPT2)
I=0/1 no blinking/blinking
(b) (52) LOGICAL FUNCTION IBRITE (I,IPT1,IPT2)
or SUBROUTINE IBRITE (I,IPT1,IPT2)
I is brightness level for subsequent display orders (0-7).
(c) (53) LOGICAL FUNCTION IDASH (I,IPT1,IPT2)
or SUBROUTINE IDASH (I,IPT1,IPT2)
I is code for broken lines = 0 unbroken
= 1 6 units on / 2 off
= 2 3 units on / 1 off
= 3 1 unit on / 1 off
(d) LOGICAL FUNCTION DELETE (IPT1,IPT2)
or SUBROUTINE DELETE (IPT1,IPT2)
Replaces the specified display code by DNOP's
(e) (44) LOGICAL FUNCTION IDRAW (I,IARRAY(J),IPT1,IPT2)
or SUBROUTINE IDRAW (I,IARRAY(J),IPT1,IPT2)
I = 0 no SAVE/RESTORE I = 1 SAVE/RESTORE
A subpicture call, referencing the display file whose
first element is IARRAY(J), is inserted.
(f) (40) LOGICAL FUNCTION ILINE (I,J,K,IPT1,IPT2)
or SUBROUTINE ILINE (I,J,K,IPT1,IPT2)
I = x-displacement
J = y-displacement
K = 0 no visible trace, K = 1 visible line
(g) (54) LOGICAL FUNCTION ILPVIS (I,IPT1,IPT2)
or SUBROUTINE ILPVIS (I,IPT1,IPT2)
I = 0/1 lightpen sensitivity off/on
(h) (55) LOGICAL FUNCTION INAME (I,IPT1,IPT2)
or SUBROUTINE INAME (I,IPT1,IPT2)
I is value put in name register of VT15 (0-127)
(i) (56) LOGICAL FUNCTION IOFFST (I,IPT1,IPT2)
or SUBROUTINE IOFFST (I,IPT1,IPT2)
I = 0/1 offset region unset/set
(j) (57) LOGICAL FUNCTION IROT (I,IPT1,IPT2)
or SUBROUTINE IROT (I,IPT1,IPT2)
I = 0/1 no rotation / 90 degrees anti-clockwise rotation
(k) (60) LOGICAL FUNCTION ISCALE (I,IPT1,IPT2)
or SUBROUTINE ISCALE (I,IPT2,IPT2)
I represents the repetition (or scale) factor for subsequent
lines and text (0-15)
(l) (43) LOGICAL FUNCTION ISETPT (I,J,K,IPT1,IPT2)
or SUBROUTINE ISETPT (I,J,K,IPT1,IPT2)
I is x-coordinate of new beam position
J is y-coordinate of new beam position
K = 0/1 no spot/visible spot
(m) (50) LOGICAL FUNCTION ISYMB (I,IPT1,IPT2)
or SUBROUTINE ISYMB (I,IPT1,IPT2)
I is the 7-bit ASCII code of the character to be displayed
(n) (41) LOGICAL FUNCTION ITEXT (T,I,IPT1,IPT2)
or SUBROUTINE ITEXT (T,I,IPT1,IPT2)
T is the first word of a string of text
I = 0 if string to be unaltered
I > 0 if altmode to be inserted in character position (J+1)
A pointer to a display file is saved in or recovered from a FOG save area. Cells are numbered 1 to 16.
(a) (110) SUBROUTINE SCHOOS (I)
Reference to currently "DCHOOS'd" file: cell number I
(b) (111) SUBROUTINE SINIT (I)
Reference to currently "DINIT'd" file: cell number I
(c) (112) INTEGER FUNCTION RCHOOS (I)
or SUBROUTINE RCHOOS (I)
Retrieve display file reference from cell I and DCHOOS
the file referred to
(d) (113) SUBROUTINE RINIT (I)
Retrieve display file reference from cell I and
DINIT the file referred to
(a) SUBROUTINE SYNCOF
The sync instruction in the standard main file is removed
(b) SUBROUTINE SYNCON
The sync instruction is restored in the standard main file
(c) (130) SUBROUTINE BLANK (IARRAY(I))
IARRAY (I) identifies a display file to be blanked
(d) (131) SUBROUTINE UNBLNK (IARRAY(1))
IARRAY(I) identifies a display file to be unblanked
(e) SUBROUTINE ALLARB (L)
L = .TRUE. arbitrary vectors only
L = .FALSE. lines displayed with smallest number of display orders