From aec337b57701baa6247d87facb0dd26fdd883a97 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Sat, 7 Mar 2015 01:19:46 -0800
Subject: 869

The repeated need for bugfixes after every new test isn't very
confidence-inducing. On the other hand, I'm starting to get into a
cadence where fixes have been easy to make. We'll see. Monotonic
progress continues.
---
 mu.arc      |   5 +-
 trace.arc.t | 278 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 trace.mu    |  93 +++++++++++---------
 3 files changed, 333 insertions(+), 43 deletions(-)

diff --git a/mu.arc b/mu.arc
index 40b09bec..ee59472b 100644
--- a/mu.arc
+++ b/mu.arc
@@ -2787,8 +2787,11 @@
   { begin
     (break-unless x:terminal-address)
     (row:integer-address <- get-address x:terminal-address/deref cursor-row:offset)
-;?     ($print row:integer-address/deref) ;? 1
+;?     ($print row:integer-address/deref) ;? 2
+;?     ($print ((", " literal))) ;? 1
     (col:integer-address <- get-address x:terminal-address/deref cursor-col:offset)
+;?     ($print col:integer-address/deref) ;? 1
+;?     ($print (("\n" literal))) ;? 1
     (width:integer <- get x:terminal-address/deref num-cols:offset)
     (t1:integer <- multiply row:integer-address/deref width:integer)
     (idx:integer <- add t1:integer col:integer-address/deref)
diff --git a/trace.arc.t b/trace.arc.t
index 33c37245..4d8cd69c 100644
--- a/trace.arc.t
+++ b/trace.arc.t
@@ -1004,5 +1004,283 @@ run: main 7: n")
             "                 "))
   (prn "F - page-up 5"))
 
+; page-up scenario 6
+; + run: main 0: a b c
+;   mem: 0 a
+; - run: main 1: d e f
+;   mem: 1 a
+;   mem: 1 b            <- top of page
+;   mem: 1 c
+;   mem: 1 d            <- bottom of page
+;   mem: 1 e
+; + run: main 2: g hi
+; + run: main 3: j
+;   mem: 3 a
+; + run: main 4: k
+; + run: main 5: l
+; + run: main 6: m
+; + run: main 7: n
+(run-code main17
+  (default-space:space-address <- new space:literal 30:literal/capacity)
+  (0:space-address/names:browser-state <- copy 3:space-address/raw/browser-state)
+  (first-index-on-page:integer/space:1 <- copy 1:literal)
+  (first-subindex-on-page:integer/space:1 <- copy 1:literal)
+  (last-index-on-page:integer/space:1 <- copy 1:literal)
+  (last-subindex-on-page:integer/space:1 <- copy 3:literal)
+  (expanded-index:integer/space:1 <- copy 1:literal)
+  (expanded-children:integer/space:1 <- copy 5:literal)
+  (s:string-address <- new "K")
+  (k:keyboard-address <- init-keyboard s:string-address)
+  (process-key 3:space-address/raw/browser-state k:keyboard-address 2:terminal-address/raw)
+  )
+(each routine completed-routines*
+  (awhen rep.routine!error
+    (prn "error - " it)))
+(when (~screen-contains memory*.4 17
+         (+ "+ main/ 0 : a b c"
+            "- main/ 1 : d e f"
+            "   mem : 1 a     "
+            "                 "
+            "                 "))
+  (prn "F - page-up 6"))
+
+; page-up scenario 7
+; + run: main 0: a b c
+;   mem: 0 a
+; + run: main 1: d e f  <- top of page
+;   mem: 1 a
+;   mem: 1 b
+;   mem: 1 c
+;   mem: 1 d
+;   mem: 1 e
+; + run: main 2: g hi
+; - run: main 3: j      <- bottom of page
+;   mem: 3 a
+; + run: main 4: k
+; + run: main 5: l
+; + run: main 6: m
+; + run: main 7: n
+(run-code main18
+  (default-space:space-address <- new space:literal 30:literal/capacity)
+  (0:space-address/names:browser-state <- copy 3:space-address/raw/browser-state)
+  (first-index-on-page:integer/space:1 <- copy 1:literal)
+  (first-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (last-index-on-page:integer/space:1 <- copy 3:literal)
+  (last-subindex-on-page:integer/space:1 <- copy -1:literal)
+  (expanded-index:integer/space:1 <- copy 3:literal)
+  (expanded-children:integer/space:1 <- copy 1:literal)
+  (s:string-address <- new "K")
+  (k:keyboard-address <- init-keyboard s:string-address)
+  (process-key 3:space-address/raw/browser-state k:keyboard-address 2:terminal-address/raw)
+  )
+(each routine completed-routines*
+  (awhen rep.routine!error
+    (prn "error - " it)))
+(when (~screen-contains memory*.4 17
+         (+ "+ main/ 0 : a b c"
+            "+ main/ 1 : d e f"
+            "+ main/ 2 : g hi "
+            "                 "))
+  (prn "F - page-up 7 - expanded index starts below bottom"))
+;? (quit) ;? 1
+
+; page-up scenario 8
+; + run: main 0: a b c
+;   mem: 0 a
+; + run: main 1: d e f  <- top of page
+;   mem: 1 a
+;   mem: 1 b
+;   mem: 1 c
+;   mem: 1 d
+;   mem: 1 e
+; + run: main 2: g hi
+; + run: main 3: j      <- bottom of page
+;   mem: 3 a
+; - run: main 4: k
+; + run: main 5: l
+; + run: main 6: m
+; + run: main 7: n
+(run-code main19
+  (default-space:space-address <- new space:literal 30:literal/capacity)
+  (0:space-address/names:browser-state <- copy 3:space-address/raw/browser-state)
+  (first-index-on-page:integer/space:1 <- copy 1:literal)
+  (first-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (last-index-on-page:integer/space:1 <- copy 3:literal)
+  (last-subindex-on-page:integer/space:1 <- copy -1:literal)
+  (expanded-index:integer/space:1 <- copy 4:literal)
+  (expanded-children:integer/space:1 <- copy 0:literal)
+  (s:string-address <- new "K")
+  (k:keyboard-address <- init-keyboard s:string-address)
+  (process-key 3:space-address/raw/browser-state k:keyboard-address 2:terminal-address/raw)
+  )
+(each routine completed-routines*
+  (awhen rep.routine!error
+    (prn "error - " it)))
+(when (~screen-contains memory*.4 17
+         (+ "+ main/ 0 : a b c"
+            "+ main/ 1 : d e f"
+            "+ main/ 2 : g hi "
+            "                 "))
+  (prn "F - page-up 8 - expanded index starts below top - 2"))
+
+; page-up scenario 9
+; - run: main 0: a b c
+;   mem: 0 a
+; + run: main 1: d e f
+;   mem: 1 a
+;   mem: 1 b
+;   mem: 1 c
+;   mem: 1 d
+;   mem: 1 e
+; + run: main 2: g hi
+; + run: main 3: j      <- top of page
+;   mem: 3 a
+; + run: main 4: k
+; + run: main 5: l      <- bottom of page
+; + run: main 6: m
+; + run: main 7: n
+(run-code main20
+  (default-space:space-address <- new space:literal 30:literal/capacity)
+  (0:space-address/names:browser-state <- copy 3:space-address/raw/browser-state)
+  (first-index-on-page:integer/space:1 <- copy 3:literal)
+  (first-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (last-index-on-page:integer/space:1 <- copy 5:literal)
+  (last-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (expanded-index:integer/space:1 <- copy 0:literal)
+  (expanded-children:integer/space:1 <- copy 1:literal)
+  (s:string-address <- new "K")
+  (k:keyboard-address <- init-keyboard s:string-address)
+  (process-key 3:space-address/raw/browser-state k:keyboard-address 2:terminal-address/raw)
+  )
+(each routine completed-routines*
+  (awhen rep.routine!error
+    (prn "error - " it)))
+(when (~screen-contains memory*.4 17
+         (+ "   mem : 0 a     "
+            "+ main/ 1 : d e f"
+            "+ main/ 2 : g hi "
+            "                 "))
+  (prn "F - page-up 9 - expanded index overlaps target page"))
+
+; page-up scenario 10
+; - run: main 0: a b c
+;   mem: 0 a
+; + run: main 1: d e f
+;   mem: 1 a
+;   mem: 1 b
+;   mem: 1 c
+;   mem: 1 d
+;   mem: 1 e
+; + run: main 2: g hi   <- top of page
+; + run: main 3: j
+;   mem: 3 a
+; + run: main 4: k      <- bottom of page
+; + run: main 5: l
+; + run: main 6: m
+; + run: main 7: n
+(run-code main21pre
+  (default-space:space-address <- new space:literal 30:literal/capacity)
+  (0:space-address/names:browser-state <- copy 3:space-address/raw/browser-state)
+  (first-index-on-page:integer/space:1 <- copy 2:literal)
+  (first-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (last-index-on-page:integer/space:1 <- copy 4:literal)
+  (last-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (expanded-index:integer/space:1 <- copy 0:literal)
+  (expanded-children:integer/space:1 <- copy 1:literal)
+  (to-top 0:space-address/browser-state 2:terminal-address/raw)
+;?   ($start-tracing) ;? 2
+  (print-page 0:space-address/browser-state 2:terminal-address/raw)
+  )
+(each routine completed-routines*
+  (awhen rep.routine!error
+    (prn "error - " it)))
+(when (~screen-contains memory*.4 17
+         (+ "+ main/ 2 : g hi "
+            "+ main/ 3 : j    "
+            "+ main/ 4 : k    "
+            "                 "
+            "                 "))
+  (prn "F - page-up 10: initial print-page state"))
+;? (quit) ;? 1
+(run-code main21
+  (default-space:space-address <- new space:literal 30:literal/capacity)
+  (0:space-address/names:browser-state <- copy 3:space-address/raw/browser-state)
+  (first-index-on-page:integer/space:1 <- copy 2:literal)
+  (first-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (last-index-on-page:integer/space:1 <- copy 4:literal)
+  (last-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (expanded-index:integer/space:1 <- copy 0:literal)
+  (expanded-children:integer/space:1 <- copy 1:literal)
+  (s:string-address <- new "K")
+  (k:keyboard-address <- init-keyboard s:string-address)
+  (process-key 3:space-address/raw/browser-state k:keyboard-address 2:terminal-address/raw)
+  )
+(each routine completed-routines*
+  (awhen rep.routine!error
+    (prn "error - " it)))
+(when (~screen-contains memory*.4 17
+         (+ "- main/ 0 : a b c"
+            "   mem : 0 a     "
+            "+ main/ 1 : d e f"
+            "                 "
+            "                 "))
+  (prn "F - page-up 10 - expanded index overlaps target page - 2"))
+;? (quit) ;? 1
+
+(reset2)
+(new-trace "trace-paginate2")
+; page-up scenario 11
+; + run: main 0: a b c
+;   mem: 0 a
+; + run: main 1: d e f
+; - run: main 2: g hi
+;   mem: 2 a
+; + run: main 3: j      <- top of page
+;   mem: 3 a
+; + run: main 4: k
+; + run: main 5: l      <- bottom of page
+; + run: main 6: m
+; + run: main 7: n
+(run-code main22
+  (default-space:space-address <- new space:literal 30:literal/capacity)
+  (x:string-address <- new
+"run: main 0: a b c
+mem: 0 a
+run: main 1: d e f
+run: main 2: g hi
+mem: 2 a
+run: main 3: j
+mem: 3 a
+run: main 4: k
+run: main 5: l
+run: main 6: m
+run: main 7: n")
+  (s:stream-address <- init-stream x:string-address)
+  (traces:instruction-trace-address-array-address <- parse-traces s:stream-address)
+  (2:terminal-address/raw <- init-fake-terminal 17:literal 15:literal)
+  (3:space-address/raw/browser-state <- browser-state traces:instruction-trace-address-array-address 3:literal/screen-height)
+  (0:space-address/names:browser-state <- copy 3:space-address/raw/browser-state)
+  (4:string-address/raw <- get 2:terminal-address/raw/deref data:offset)
+  (first-index-on-page:integer/space:1 <- copy 3:literal)
+  (first-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (last-index-on-page:integer/space:1 <- copy 5:literal)
+  (last-subindex-on-page:integer/space:1 <- copy -2:literal)
+  (expanded-index:integer/space:1 <- copy 2:literal)
+  (expanded-children:integer/space:1 <- copy 1:literal)
+  (s:string-address <- new "K")
+  (k:keyboard-address <- init-keyboard s:string-address)
+  (process-key 3:space-address/raw/browser-state k:keyboard-address 2:terminal-address/raw)
+  )
+(each routine completed-routines*
+  (awhen rep.routine!error
+    (prn "error - " it)))
+(when (~screen-contains memory*.4 17
+         (+ "+ main/ 1 : d e f"
+            "- main/ 2 : g hi "
+            "   mem : 2 a     "
+            "                 "
+            "                 "))
+  (prn "F - page-up 11 - expanded index overlaps target page - 3"))
+
 (reset2)
 ;? (print-times) ;? 3
diff --git a/trace.mu b/trace.mu
index 300ae35f..7db6adfe 100644
--- a/trace.mu
+++ b/trace.mu
@@ -477,27 +477,27 @@
 (function print-page [
   (default-space:space-address <- new space:literal 30:literal/capacity)
   (0:space-address/names:browser-state <- next-input)
-;?   ($print (("print-page " literal))) ;? 1
-;?   ($print first-index-on-page:integer/space:1) ;? 1
-;?   ($print ((" " literal))) ;? 1
-;?   ($print first-subindex-on-page:integer/space:1) ;? 1
-;?   ($print (("\n" literal))) ;? 1
+;?   ($print (("print-page " literal))) ;? 3
+;?   ($print first-index-on-page:integer/space:1) ;? 3
+;?   ($print ((" " literal))) ;? 3
+;?   ($print first-subindex-on-page:integer/space:1) ;? 3
+;?   ($print (("\n" literal))) ;? 3
   (screen:terminal-address <- next-input)
-;?   ($dump-browser-state 0:space-address/browser-state) ;? 1
+;?   ($dump-browser-state 0:space-address/browser-state) ;? 2
   ; if top inside expanded index, complete existing trace
   (first-full-index:integer <- copy first-index-on-page:integer/space:1)
-;?   ($print first-full-index:integer) ;? 1
-;?   ($print cursor-row:integer/space:1) ;? 1
+;?   ($print first-full-index:integer) ;? 2
+;?   ($print cursor-row:integer/space:1) ;? 2
   { begin
     (screen-done?:boolean <- greater-or-equal cursor-row:integer/space:1 screen-height:integer/space:1)
     (break-unless screen-done?:boolean)
     (reply)
   }
-;?   ($print (("\nAAA\n" literal))) ;? 2
+;?   ($print (("\nAAA\n" literal))) ;? 3
   { begin
     (partial-trace?:boolean <- equal first-index-on-page:integer/space:1 expanded-index:integer/space:1)
     (break-unless partial-trace?:boolean)
-;?   ($print (("AAA: partial\n" literal))) ;? 2
+;?   ($print (("AAA: partial\n" literal))) ;? 3
     (first-full-index:integer <- add first-full-index:integer 1:literal)
     (tr:instruction-trace-address <- index traces:instruction-trace-address-array-address/space:1/deref first-index-on-page:integer/space:1)
     { begin
@@ -515,7 +515,7 @@
       ; or screen ends
       (screen-done?:boolean <- greater-or-equal cursor-row:integer/space:1 screen-height:integer/space:1)
       (break-if screen-done?:boolean)
-;?       ($print (("AAA printing subtrace\n" literal))) ;? 1
+;?       ($print (("AAA printing subtrace\n" literal))) ;? 2
       (t:trace-address <- index ch:trace-address-array-address/deref i:integer)
       (print-character screen:terminal-address ((#\space literal)))
       (print-character screen:terminal-address ((#\space literal)))
@@ -527,19 +527,19 @@
       (loop)
     }
   }
-;?   ($print (("AAA 3: " literal))) ;? 3
-;?   ($print cursor-row:integer/space:1) ;? 2
-;?   ($print (("\n" literal))) ;? 2
+;?   ($print (("AAA 3: " literal))) ;? 4
+;?   ($print cursor-row:integer/space:1) ;? 3
+;?   ($print (("\n" literal))) ;? 3
   { begin
     (screen-done?:boolean <- greater-or-equal cursor-row:integer/space:1 screen-height:integer/space:1)
     (break-unless screen-done?:boolean)
     (reply)
   }
-;?   ($print (("AAA 4\n" literal))) ;? 3
+;?   ($print (("AAA 4\n" literal))) ;? 4
   { begin
     (has-expanded?:boolean <- greater-or-equal expanded-index:integer/space:1 0:literal)
     (break-if has-expanded?:boolean)
-;?     ($print (("AAA 5a\n" literal))) ;? 2
+;?     ($print (("AAA 5a\n" literal))) ;? 3
     (print-traces-collapsed-from 0:space-address/browser-state screen:terminal-address first-full-index:integer)
     (clear-rest-of-page 0:space-address/browser-state screen:terminal-address)
     (reply)
@@ -547,19 +547,23 @@
   { begin
     (below-expanded?:boolean <- greater-than first-full-index:integer expanded-index:integer/space:1)
     (break-unless below-expanded?:boolean)
-;?     ($print (("AAA 5b\n" literal))) ;? 2
+;?     ($print (("AAA 5b\n" literal))) ;? 3
     (print-traces-collapsed-from 0:space-address/browser-state screen:terminal-address first-full-index:integer)
     (clear-rest-of-page 0:space-address/browser-state screen:terminal-address)
     (reply)
   }
   ; trace has an expanded index and it's below first-full-index
   ; print traces collapsed until expanded index
-;?   ($print (("AAA 5c\n" literal))) ;? 2
+;?   ($print (("AAA 5c\n" literal))) ;? 3
   (print-traces-collapsed-from 0:space-address/browser-state screen:terminal-address first-full-index:integer expanded-index:integer/space:1/until)
   ; if room, start printing expanded index
-  (tr:instruction-trace-address <- index traces:instruction-trace-address-array-address/space:1/deref expanded-index:integer/space:1)
-  (print-instruction-trace screen:terminal-address tr:instruction-trace-address 0:space-address/browser-state)
-  (clear-rest-of-page 0:space-address/browser-state screen:terminal-address)
+  { begin
+    (done?:boolean <- greater-or-equal cursor-row:integer/space:1 screen-height:integer/space:1)
+    (break-if done?:boolean)
+    (tr:instruction-trace-address <- index traces:instruction-trace-address-array-address/space:1/deref expanded-index:integer/space:1)
+    (print-instruction-trace screen:terminal-address tr:instruction-trace-address 0:space-address/browser-state)
+    (clear-rest-of-page 0:space-address/browser-state screen:terminal-address)
+  }
 ])
 
 (function cursor-row-to-trace-index [
@@ -805,71 +809,76 @@
 ;?   ($print (("\n" literal))) ;? 2
   ; easy case: no expanded-index
   (jump-unless expanded-index:integer/space:1)
-;?   ($print (("b\n" literal))) ;? 3
+;?   ($print (("b\n" literal))) ;? 4
   (x:boolean <- less-than expanded-index:integer/space:1 0:literal)
   (jump-if x:boolean easy-case:offset)
   ; easy case: expanded-index lies below top of current page
-;?   ($print (("c\n" literal))) ;? 3
+;?   ($print (("c\n" literal))) ;? 4
   (x:boolean <- greater-than expanded-index:integer/space:1 first-index-on-page:integer/space:1)
   (jump-if x:boolean easy-case:offset)
   ; easy case: expanded-index *starts* at top of current page
-;?   ($print (("d\n" literal))) ;? 4
+;?   ($print (("d\n" literal))) ;? 5
   (top-of-screen-inside-expanded:boolean <- equal expanded-index:integer/space:1 first-index-on-page:integer/space:1)
   (y:boolean <- lesser-or-equal first-subindex-on-page:integer/space:1 -1:literal)
   (y:boolean <- and top-of-screen-inside-expanded:boolean y:boolean)
   (jump-if y:boolean easy-case:offset)
   ; easy case: expanded-index too far up for previous page
-;?   ($print (("e\n" literal))) ;? 4
+;?   ($print (("e\n" literal))) ;? 5
   (delta-to-expanded:integer <- subtract first-index-on-page:integer/space:1 expanded-index:integer/space:1)
-;?   ($print (("e2\n" literal))) ;? 3
-  (x:boolean <- greater-than delta-to-expanded:integer expanded-index:integer/space:1)
-;?   ($print (("e3\n" literal))) ;? 3
+;?   ($print delta-to-expanded:integer) ;? 1
+;?   ($print (("\n" literal))) ;? 1
+  (x:boolean <- greater-than delta-to-expanded:integer screen-height:integer/space:1)
   (jump-if x:boolean easy-case:offset)
-;?   ($print (("f\n" literal))) ;? 4
+;?   ($print (("f\n" literal))) ;? 5
   ; tough case: expanded index overlaps current and/or previous page
   (lines-remaining-to-decrement:integer <- copy screen-height:integer/space:1)
-  ; a) scroll to expanded-index if necessary
+  ; a) scroll to just below expanded-index if necessary
+  (below-expanded-index:integer <- add expanded-index:integer/space:1 1:literal)
   { begin
     (done?:boolean <- done-scrolling-up default-space:space-address)
     (break-if done?:boolean)
-    (done?:boolean <- lesser-or-equal first-index-on-page:integer/space:1 expanded-index:integer/space:1)
+    (done?:boolean <- lesser-or-equal first-index-on-page:integer/space:1 below-expanded-index:integer)
     (break-if done?:boolean)
-;?     ($print (("g\n" literal))) ;? 1
+;?     ($print (("g\n" literal))) ;? 2
     (first-index-on-page:integer/space:1 <- subtract first-index-on-page:integer/space:1 1:literal)
     (lines-remaining-to-decrement:integer <- subtract lines-remaining-to-decrement:integer 1:literal)
     (loop)
   }
-  ; b) scroll through expanded-children
-;?   ($print (("h\n" literal))) ;? 1
-  (x:boolean <- equal first-index-on-page:integer/space:1 expanded-index:integer/space:1)
-  (assert x:boolean (("previous-page error 1" literal)))
-  (first-subindex-on-page:integer <- copy expanded-children:integer/space:1)
+  { begin
+;?     ($print (("h\n" literal))) ;? 2
+    (x:boolean <- equal first-index-on-page:integer/space:1 below-expanded-index:integer)
+    (break-unless x:boolean)
+    (first-index-on-page:integer/space:1 <- copy expanded-index:integer/space:1)
+    (first-subindex-on-page:integer/space:1 <- subtract expanded-children:integer/space:1 1:literal)
+    (lines-remaining-to-decrement:integer <- subtract lines-remaining-to-decrement:integer 1:literal)
+  }
+  ; b) scroll through expanded-children if necessary
   { begin
     (done?:boolean <- done-scrolling-up default-space:space-address)
     (break-if done?:boolean)
     (done?:boolean <- less-than first-subindex-on-page:integer/space:1 0:literal)
     (break-if done?:boolean)
-;?     ($print (("i\n" literal))) ;? 1
+;?     ($print (("i\n" literal))) ;? 2
     (first-subindex-on-page:integer/space:1 <- subtract first-subindex-on-page:integer/space:1 1:literal)
     (lines-remaining-to-decrement:integer <- subtract lines-remaining-to-decrement:integer 1:literal)
     (loop)
   }
   ; c) jump past expanded-index parent if necessary
-;?   ($print (("j\n" literal))) ;? 1
+;?   ($print (("j\n" literal))) ;? 2
   { begin
     (done?:boolean <- done-scrolling-up default-space:space-address)
     (break-if done?:boolean)
-;?     ($print (("k\n" literal))) ;? 1
+;?     ($print (("k\n" literal))) ;? 2
     (first-index-on-page:integer/space:1 <- subtract first-index-on-page:integer/space:1 1:literal)
     (first-subindex-on-page:integer/space:1 <- copy -2:literal)
     (lines-remaining-to-decrement:integer <- subtract lines-remaining-to-decrement:integer 1:literal)
   }
   ; d) scroll up before expanded-index if necessary
-;?   ($print (("i\n" literal))) ;? 1
+;?   ($print (("l\n" literal))) ;? 2
   { begin
     (done?:boolean <- done-scrolling-up default-space:space-address)
     (break-if done?:boolean)
-;?     ($print (("j\n" literal))) ;? 1
+;?     ($print (("m\n" literal))) ;? 2
     (first-index-on-page:integer/space:1 <- subtract first-index-on-page:integer/space:1 1:literal)
     (lines-remaining-to-decrement:integer <- subtract lines-remaining-to-decrement:integer 1:literal)
     (loop)
-- 
cgit 1.4.1-2-gfad0