return -length(primitives)
end
-callPrim(addr::Int64) = primitives[-addr]()
+function callPrim(addr::Int64)
+ if addr >=0 || -addr>length(primitives)
+ error("Attempted to execute non-existent primitive at address $addr.")
+ else
+ primitives[-addr]()
+ end
+end
getPrimName(addr::Int64) = primNames[-addr]
# Word creation functions
# Outer interpreter
TRACE = defPrimWord("TRACE", () -> begin
- print("RS: "); printRS()
+ println("reg.W: $(reg.W) reg.IP: $(reg.IP)")
print("PS: "); printPS()
+ print("RS: "); printRS()
print("[paused]")
readline()
DUP, FETCH, ZE, ZBRANCH, 3,
DROP, EXIT, # Exit if TIB is exhausted
- STATE_CFA, FETCH, ZBRANCH, 32,
+ STATE_CFA, FETCH, ZBRANCH, 31,
# Compiling
DUP, FIND, QDUP, ZBRANCH, 19,
COMMA, BRANCH, -36,
# No word found, parse number
- NUMBER, BTICK, LIT, COMMA, COMMA, TRACE, BRANCH, -44,
+ NUMBER, BTICK, LIT, COMMA, COMMA, BRANCH, -43,
# Interpreting
DUP, FIND, QDUP, ZBRANCH, 7,
# Found word. Execute!
- SWAP, DROP, TOCFA, EXECUTE, BRANCH, -55,
+ SWAP, DROP, TOCFA, EXECUTE, BRANCH, -54,
# No word found, parse number and leave on stack
- NUMBER, BRANCH, -58,
+ NUMBER, BRANCH, -57,
EXIT]
)
return NEXT
end, flags=F_IMMED)
-TICK = defWord("'",
- [LIT, 32, WORD, FIND, TOCFA, EXIT])
-
#### VM loop ####
initFileName = Pkg.dir("forth/src/lib.4th")
end
-function run(;initialize=false)
+function run(;initialize=true)
# Begin with STDIN as source
push!(sources, STDIN)
close(pop!(sources))
end
+ # Want backtrace in here eventually
+ println("reg.W: $(reg.W) reg.IP: $(reg.IP)")
+ print("PS: "); printPS()
+ print("RS: "); printRS()
+
mem[STATE] = 0
mem[NUMTIB] = 0
reg.PSP = mem[PSP0]