diff --git a/asm/65816.fnl b/asm/65816.fnl
index 4899952..f0dea45 100644
--- a/asm/65816.fnl
+++ b/asm/65816.fnl
@@ -55,8 +55,8 @@
     (where [mvx srcbank dstbank]
            (= (type srcbank) :number) (= (type dstbank) :number) (= (mvx:sub 1 2) :mv))
        [:bm [srcbank dstbank]]
-    (where [_ imm] (or (= (type imm) :number) (= (type imm) :function))) [:imm imm]
     [_ offset :s] [:sr offset]
+    (where [_ imm] (or (= (type imm) :number) (= (type imm) :function))) [:imm imm]
     [_ [[addr]] :y] [:idly addr]
     [_ [addr :s] :y] [:isy addr]
     [_ [addr] :y] [:idy addr]
@@ -98,7 +98,9 @@
 ; TODO: handle 8-bit modes
   (match op.mode
     (where (or :sr :dp :dpx :dpy :idp :idx :idy :idl :idly :isy :rel)) 2
-    :imm 3 ;; todo: support 8-bit immediate mode
+    :imm (match op.opcode
+           (where (or :cop :brk :sep :rep)) 2
+           _ 3) ;; todo: support 8-bit immediate mode
     (where (or :abs :abx :aby :ind :iax :rell :bm)) 3
     (where (or :abl :alx :ial)) 4
     nil 1
@@ -115,14 +117,13 @@
             (= op.mode :bm) (.. (int8-to-bytes (. op.arg 1)) (int8-to-bytes (. op.arg 2)))
             (and (= op.mode :imm) (= (type op.arg) "function"))
               (int16-to-bytes (op.arg env))
-            (= op.mode :imm) (int16-to-bytes op.arg)
-            (= op.mode :rel)
-              (int8-to-bytes (- (env:lookup-addr op.arg) (+ op.addr 2)))
-            (= op.mode :rell)
-              (int16-to-bytes (- (env:lookup-addr op.arg) (+ op.addr 3)))
-            (= (op-pdat.size op) 2) (int8-to-bytes (env:lookup-addr op.arg))
-            (= (op-pdat.size op) 3) (int16-to-bytes (env:lookup-addr op.arg))
-            (= (op-pdat.size op) 4) (int24-to-bytes (env:lookup-addr op.arg))
+            (and (= op.mode :imm) (= (op-pdat.size op env) 3)) (int16-to-bytes op.arg)
+            (and (= op.mode :imm) (= (op-pdat.size op env) 2)) (int8-to-bytes op.arg)
+            (= op.mode :rel)  (int8-to-bytes (- (env:lookup-addr op.arg) (+ op.addr 2)))
+            (= op.mode :rell) (int16-to-bytes (- (env:lookup-addr op.arg) (+ op.addr 3)))
+            (= (op-pdat.size op env) 2) (int8-to-bytes (env:lookup-addr op.arg))
+            (= (op-pdat.size op env) 3) (int16-to-bytes (env:lookup-addr op.arg))
+            (= (op-pdat.size op env) 4) (int24-to-bytes (env:lookup-addr op.arg))
             "")]
       (if opbyte
         (.. (int8-to-bytes opbyte) argbytes)
diff --git a/game/files.fnl b/game/files.fnl
index 2735844..357563d 100644
--- a/game/files.fnl
+++ b/game/files.fnl
@@ -4,7 +4,7 @@
 
 (local files (util.hot-table ...))
 
-(local default-filename "bitsy/game.json")
+(local default-filename "neutgs/game.json")
 
 (local encoded-tile-fields [:gfx :mask])
 (fn convert [tile field method]
diff --git a/link/mame.fnl b/link/mame.fnl
index 4e234b8..036d685 100644
--- a/link/mame.fnl
+++ b/link/mame.fnl
@@ -141,7 +141,7 @@
     (bencode.encode addr-to-bytes)))
 (fn Machine.launch [self prg]
   (self:eval "(manager.machine:soft_reset)")
-  (self:eval (string.format "(emu.keypost \"CALL-151\\n %xG\\n\")" (prg:lookup-addr prg.start-symbol))))
+  (self:eval (string.format "(emu.keypost \"\n\n\n\nCALL-151\\n %xG\\n\")" (prg:lookup-addr prg.start-symbol))))
 (fn Machine.reboot [self] (self:eval "(manager.machine:hard_reset)"))
 (fn Machine.coro-eval [self code ?handlers]
   (var result nil)
diff --git a/neutgs/init.fnl b/neutgs/init.fnl
new file mode 100644
index 0000000..43e9106
--- /dev/null
+++ b/neutgs/init.fnl
@@ -0,0 +1,21 @@
+(local Ssc (require :ssc))
+(import-macros {:sss ! : compile} :ssc.macros)
+
+(local ssc (Ssc))
+(set ssc.prg.start-symbol :boot)
+(compile ssc
+  (org 0xc00)
+  (asm
+    boot
+      (clc) (xce) (rep 0x30) ; disable emulation mode, 16-bit index registers
+      (jsr main)
+      (sec) (xce) ;re-enter emulation mode
+      (rts))
+  (fn printnum (num) ; TODO
+    )
+  (fn add (lhs rhs) (+ lhs rhs))
+  (fn main ()
+    (printnum (add 1 2)))
+)
+
+(ssc:assemble)
diff --git a/ssc/init.fnl b/ssc/init.fnl
index c4a07a8..1ced5d7 100644
--- a/ssc/init.fnl
+++ b/ssc/init.fnl
@@ -58,6 +58,8 @@
   (tset self.locals (length self.locals) nil)
   [:ply])
 
+(fn Ssc.defining? [self] (> (length self.locals) 0))
+
 (fn countiter [minmax ?max]
   (let [min (if ?max minmax 1)
         max (or ?max minmax)]
@@ -73,7 +75,7 @@
   (let [compiled-left    (self:compile-expr left)
         push-left        (when (not= (type right) :number) (self:push))
         compiled-compare (if (not push-left) [:cmp right]
-                           [:block push-left (self:compile-expr right) [:cmp 0 :s]])
+                           [:block push-left (self:compile-expr right) [:cmp 1 :s]])
         drop-left (when push-left (self:drop))]
     [:block
       compiled-left
@@ -87,7 +89,9 @@
       drop-left]))
 
 (set Ssc.forms
-  {:asm (fn [self ...] [:block ...])
+  {:asm (fn [self ...]
+          (if (self:defining?) [:block ...]
+            (self.org:append ...)))
    :org (lambda [self org] (set self.org (self.prg:org org)))
    :do (fn [self ...] (lume.concat [:block] (icollect [i (countiter (select :# ...))] (self:compile-expr (select i ...)))))
    :let (fn [self bindings ...]
@@ -107,7 +111,7 @@
                 -1 [:dec] -2 [:block [:dec] [:dec]]
                 (where val (= (type val) :number)) [:block [:clc] [:adc val]]
                 (where sym (= (type sym) :string) (self:local-offset sym)) [:block [:clc] [:adc (self:local-offset sym) :s]]
-                _ [:block (self:push) (self:compile-expr val) [:clc] [:adc 0 :s] (self:drop)]))))
+                _ [:block (self:push) (self:compile-expr val) [:clc] [:adc 1 :s] (self:drop)]))))
         block)
    :- (lambda [self first ...]
         (let [block [:block (self:compile-expr first)]
@@ -121,7 +125,7 @@
                     -1 [:inc] -2 [:block [:inc] [:inc]]
                     (where val (= (type val) :number)) [:block [:sec] [:sbc val]]
                     (where sym (= (type sym) :string) (self:local-offset sym)) [:block [:sec] [:sbc (self:local-offset sym) :s]]
-                    _ [:block (self:push) (self:compile-expr val) [:sec] [:sbc 0 :s] (self:drop)])))))
+                    _ [:block (self:push) (self:compile-expr val) [:sec] [:sbc 1 :s] (self:drop)])))))
           block))
     := (lambda [self lhs rhs] (boolop self lhs rhs :beq))
     :not= (lambda [self lhs rhs] (boolop self lhs rhs :bne))
@@ -142,7 +146,7 @@
               (when ?iffalse [(self:compile-expr ?iffalse)])
             [:-finished-]))
     :fn (lambda [self name args ...]
-          (assert (= (length self.locals) 0))
+          (assert (not (self:defining?)))
           (set self.locals (lume.concat args [[:tmp]]))
           (tset self.functions name {:arity (length args) : args :org self.org})
           ; todo: maybe handle mutually recursive functions? (compile-expr only has access to currently-defined functions)
@@ -156,7 +160,7 @@
   (var offset nil)
   (for [i 1 (length self.locals)]
     (when (= (. self.locals i) symbol)
-      (set offset (* 2 (- (length self.locals) i)))))
+      (set offset (+ 1 (* 2 (- (length self.locals) i))))))
   offset)
 
 (fn Ssc.compile-expr [self expr]
@@ -178,4 +182,8 @@
     (self:compile-expr (select i ...)))
   self)
 
+(fn Ssc.assemble [self]
+  (self.prg:assemble)
+  self.prg)
+
 Ssc