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diff --git a/src/interp/nhyper.boot b/src/interp/nhyper.boot
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+-- Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
+-- All rights reserved.
+-- Copyright (C) 2007, Gabriel Dos Reis.
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions are
+-- met:
+--
+--     - Redistributions of source code must retain the above copyright
+--       notice, this list of conditions and the following disclaimer.
+--
+--     - Redistributions in binary form must reproduce the above copyright
+--       notice, this list of conditions and the following disclaimer in
+--       the documentation and/or other materials provided with the
+--       distribution.
+--
+--     - Neither the name of The Numerical ALgorithms Group Ltd. nor the
+--       names of its contributors may be used to endorse or promote products
+--       derived from this software without specific prior written permission.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+-- HyperTex Spad interface
+
+--SETANDFILEQ($SendXEventToHyperTeX, 8)
+--SETANDFILEQ($LinkToPage, 96)
+--SETANDFILEQ($StartPage, 97)
+--SETANDFILEQ($SendLine, 98)
+--SETANDFILEQ($EndOfPage, 99)
+--SETANDFILEQ($PopUpPage, 95)
+--SETANDFILEQ($PopUpNamedPage, 94)
+--SETANDFILEQ($KillPage, 93)
+--SETANDFILEQ($ReplacePage, 92)
+--SETANDFILEQ($ReplaceNamedPage, 91)
+--SETANDFILEQ($SpadError, 90)
+--SETANDFILEQ($PageStuff, 100)
+
+-- Issue a line of HyperTex
+issueHT line ==
+  sockSendInt($MenuServer, $SendLine)
+  sockSendString($MenuServer, line)
+
+endHTPage() ==
+  sockSendInt($MenuServer, $EndOfPage)
+
+testPage() ==
+  startHTPage(50)
+  issueHT '"\page{TestPage}{Test Page generated from Lisp} "
+  issueHT '"\horizontalline\beginscroll\beginitems "
+  issueHT '"\item \downlink{Quayle Jokes}{ChickenPage} \space{2} "
+  issueHT '"The misadventures of the White House bellboy. "
+  issueHT '"\enditems\endscroll\autobuttons "
+  endHTPage()
+
+-- create a named top-page
+HTLinkToPage name ==
+  sockSendInt($MenuServer, $PageStuff)
+  sockSendInt($MenuServer, $currentFrameNum)
+  sockSendInt($MenuServer, $LinkToPage)
+  sockSendString($MenuServer, name)
+
+-- create a pop-up named page ; returns a windowid
+HTPopUpNamedPage(name,cols) ==
+  sockSendInt($MenuServer, $PageStuff)
+  sockSendInt($MenuServer, $currentFrameNum)
+  sockSendInt($MenuServer, $PopUpNamedPage)
+  sockSendInt($MenuServer, cols)
+  sockSendString($MenuServer, name)
+  sockGetInt($MenuServer)
+
+-- Update a window with named page
+HTReplaceNamedPage(window, name) ==
+  sockSendInt($MenuServer, $PageStuff)
+  sockSendInt($MenuServer, $currentFrameNum)
+  sockSendInt($MenuServer, $ReplaceNamedPage)
+  sockSendInt($MenuServer, window)
+  sockSendString($MenuServer, name)
+   
+-- Start a pop-up page ; returns a windowid
+HTPopUpPage cols ==
+  sockSendInt($MenuServer, $PageStuff)
+  sockSendInt($MenuServer, $currentFrameNum)
+  sockSendInt($MenuServer, $PopUpPage)
+  sockSendInt($MenuServer, cols)
+  sockGetInt($MenuServer)
+
+-- Start an update sequence on a window
+HTReplacePage w ==
+  sockSendInt($MenuServer, $PageStuff)
+  sockSendInt($MenuServer, $currentFrameNum)
+  sockSendInt($MenuServer, $ReplacePage)
+  sockSendInt($MenuServer, w)
+
+-- Start a top-page ; no further Lisp interaction
+HTStartPage cols ==
+  sockSendInt($MenuServer, $PageStuff)
+  sockSendInt($MenuServer, $currentFrameNum)
+  sockSendInt($MenuServer, $StartPage)
+  sockSendInt($MenuServer, cols)
+
+-- Kill a window from Lisp
+HTKillPage w ==
+  sockSendInt($MenuServer, $PageStuff)
+  sockSendInt($MenuServer, $currentFrameNum)
+  sockSendInt($MenuServer, $KillPage)
+  sockSendInt($MenuServer, w)
+   
+HTErrorSignal() ==
+  sockSendInt($MenuServer, $SpadError)