+STATE, STATE_CFA = defNewVar("STATE", 0)
+
+INTERPRET = defWord("INTERPRET",
+ [LIT, 32, WORD, # Read next space-delimited word
+
+ DUP, FETCH, ZE, ZBRANCH, 3,
+ DROP, EXIT, # Exit if TIB is exhausted
+
+ STATE_CFA, FETCH, ZBRANCH, 27,
+ # Compiling
+ DUP, FIND, ZBRANCH, 17,
+
+ # Found word.
+ DUP, TOCFA, SWAP, INCR, FETCH, LIT, F_IMMED, AND, ZBRANCH, 4,
+ # Immediate: Execute!
+ EXECUTE, BRANCH, -30,
+
+ # Not immediate: Compile!
+ COMMA, BRANCH, -33,
+
+ # No word found, parse number
+ NUMBER, BTICK, LIT, COMMA, BRANCH, -39,
+
+ # Interpreting
+ DUP, FIND, ZBRANCH, 5,
+
+ # Found word. Execute!
+ TOCFA, EXECUTE, BRANCH, -47,
+
+ # No word found, parse number and leave on stack
+ NUMBER, BRANCH, -50,
+ EXIT]
+)
+
+PROMPT = defPrimWord("PROMPT", () -> begin
+ if (mem[STATE] == 0 && currentSource() == STDIN)
+ println(" ok")
+ end
+
+ return NEXT
+end)
+
+QUIT = defWord("QUIT",
+ [RSP0_CFA, RSPSTORE,
+ QUERY,
+ INTERPRET, PROMPT,
+ BRANCH,-4])
+
+BYE = defPrimWord("BYE", () -> begin
+ return 0
+end)
+
+INCLUDE = defPrimWord("INCLUDE", () -> begin
+ callPrim(mem[WORD])
+ wordLen = popPS()
+ wordAddr = popPS()
+ word = getString(wordAddr, wordLen)
+
+ push!(sources, open(word, "r"))
+
+ # Clear input buffer
+ mem[NUMTIB] = 0
+
+ return NEXT
+end)
+
+# Compilation
+
+HEADER = defPrimWord("HEADER", () -> begin
+
+ wordAddr = popPS()+1
+ wordLen = mem[wordAddr-1]
+ word = getString(wordAddr, wordLen)
+
+ createHeader(word, 0)
+
+ return NEXT
+end)
+
+LBRAC = defPrimWord("[", () -> begin
+ mem[STATE] = 0
+ return NEXT
+end, flags=F_IMMED)
+
+RBRAC = defPrimWord("]", () -> begin
+ mem[STATE] = 1
+ return NEXT
+end, flags=F_IMMED)
+
+HIDDEN = defPrimWord("HIDDEN", () -> begin
+ addr = popPS() + 1
+ mem[addr] = mem[addr] $ F_HIDDEN
+ return NEXT
+end)
+
+HIDE = defWord("HIDE",
+ [WORD,
+ FIND,
+ HIDDEN,
+ EXIT])
+
+COLON = defWord(":",
+ [WORD,
+ HEADER,
+ LIT, DOCOL, COMMA,
+ LATEST_CFA, FETCH, HIDDEN,
+ RBRAC,
+ EXIT])
+
+SEMICOLON = defWord(";",
+ [LIT, EXIT, COMMA,
+ LATEST_CFA, FETCH, HIDDEN,
+ LBRAC,
+ EXIT], flags=F_IMMED)
+
+IMMEDIATE = defPrimWord("IMMEDIATE", () -> begin
+ lenAndFlagsAddr = mem[LATEST] + 1
+ mem[lenAndFlagsAddr] = mem[lenAndFlagsAddr] $ F_IMMED
+ return NEXT
+end, flags=F_IMMED)
+
+TICK = defWord("'",
+ [WORD, FIND, TOCFA, EXIT])
+
+