Add something like a garbage collector

Split heap into temporary "little heap" and permanent "big heap".
Defined symbols get copied into big heap, and little heap is
reset after each REPL iteration.

1 files changed, 89 insertions, 0 deletions

diff --git a/layout.s b/layout.s
new file mode 100644
index 0000000..04a768c
--- /dev/null
+++ b/layout.s
@@ -0,0 +1,89 @@
+^- stack
+1000:
+  init
+2000:
+  read
+3000:
+  eval
+4000:
+  print
+  4400:
+    cons
+  4500:
+    assoc
+  4600:
+    eq
+5000:
+  atom "NIL\0"
+    005000 005003
+    005002 044516 ; "NI"
+    005004 000114 ; "L\0"
+  atom "T\0"
+    005006 005011
+    005010 000124 ; "T\0"
+  atom "F\0"
+    005012 005015
+    005014 000106 ; "F\0"
+  atom "QUOTE\0"
+    005016 005021
+    005020 052521 ; "QU"
+    005022 052117 ; "OT"
+    005024 000105 ; "E\0"
+  atom "ATOM\0"
+    005026 005031
+    005030 052101 ; "AT"
+    005032 046517 ; "OM"
+    005034 000000 ; "\0"
+  atom "EQ\0"
+    005036 005041
+    005040 050505 ; "EQ"
+    005042 000000 ; "\0"
+  atom "COND\0"
+    005044 005047
+    005046 047503 ; "CO"
+    005050 042116 ; "ND"
+    005052 000000 ; "\0"
+  atom "CAR\0"
+    005054 005057
+    005056 040503 ; "CA"
+    005060 000122 ; "R\0"
+  atom "CDR\0"
+    005062 005065
+    005064 042103 ; "CD"
+    005066 000122 ; "R\0"
+  atom "CONS\0"
+    005070 005073
+    005072 047503 ; "CO"
+    005074 051516 ; "NS"
+    005076 000000 ; "\0"
+  atom "LABEL\0"
+    005100 005103
+    005102 040514 ; "LA"
+    005104 042502 ; "BE"
+    005106 000114 ; "L\0"
+  atom "LAMBDA\0"
+    005110 005113
+    005112 040514 ; "LA"
+    005114 041115 ; "MB"
+    005116 040504 ; "DA"
+    005120 000000 ; "\0"
+  atom "DEFINE\0"
+    005122 005125
+    005124 042504 ; "DE"
+    005126 044506 ; "FI"
+    005130 042516 ; "NE"
+    005132 000000 ; "\0"
+  5400:
+    copy
+  5600:
+    big_cons
+6000:
+  symbol table
+7000:
+  print buffer
+10000:
+  little_heap
+    010000 010002 ; free pointer
+11000:
+  big_heap
+    011000 011002 ; free pointer