stab = {}
stab.stack = {}
stab.pc = 1
stab.cins = 0
mem = {}
t400 = require "t400"

while true do
 io.write("*> ")
 i=io.read()
 it = {}
 for s in i:gmatch("%S+") do it[#it+1] = s end
 if it[1] == "quit" then
  break
 elseif it[1] == "peek" then
  print(mem[tonumber(it[2])])
 elseif it[1] == "poke" then
  mem[tonumber(it[2])] = tonumber(it[3])
 elseif it[1] == "push" then
  stab.stack[#stab.stack+1] = tonumber(it[2])
 elseif it[1] == "dumpstack" then
  for k,v in ipairs(stab.stack) do print(k,v) end
 elseif it[1] == "ppc" then
  print(stab.pc)
 elseif it[1] == "spc" then
  stab.pc=tonumber(it[2])
 elseif it[1] == "step" then
  local scount = tonumber(it[2]) or 1
  for i = 1, scount do
   stab.cins = mem[stab.pc]
   stab,rw,addr,val=t400.run(stab)
   if rw == "halt" then break end
   if rw == "read" then
    stab.stack[#stab.stack+1] = mem[addr]
   elseif rw == "write" then
    mem[addr] = dat
   end
  end
 elseif it[1] == "load" then
  local f,e = io.open(it[2])
  if f == nil then
   print("Error: "..e)
  else
   local n = tonumber(it[3]) or 0
   local c = f:read("*a")
   f:close()
   for v in c:gmatch("%S+") do
    mem[n] = tonumber(v) or 0
    n = n + 1
   end
  end
 end
end