diff --git a/6502.lua b/6502.lua
index 58e86eb..219a561 100644
--- a/6502.lua
+++ b/6502.lua
@@ -99,6 +99,7 @@ M.link = function()
                 if position then
                     chunk_reserve(chunk_ix, chunk, position, section.size)
                     section.org = position
+                    symbols[section.label] = position
                     goto chunk_located
                 end
             end
@@ -121,27 +122,27 @@ M.genbin = function(filler)
     local bin = {}
     local ins = table.insert
     table.sort(locations, function(a,b) return a.start < b.start end)
-    local position = 0
     for _,location in ipairs(locations) do
-        if location.start < position then
+        if location.start < #bin then
             error(string.format("location [%04x,%04x] overlaps another",
                 location.start, math.type(location.size) == 'integer' and (location.size + location.start) or 0xffff))
         end
-        for i=position,location.start do ins(bin, filler) end
-        position = location.start
+        for i=#bin,location.start do ins(bin, filler) end
+        M.size=0 M.cycles=0
         local sections = location.sections
         table.sort(sections, function(a,b) return a.start < b.start end)
         for _,section in sections do
-            assert(section.org >= position)
-            for i=position,section.org do ins(bin, filler) end
+            assert(section.org >= #bin)
+            for i=#bin,section.org do ins(bin, filler) end
             for _,instruction in ipairs(section.instructions) do
-                -- TODO
+                if instruction.bin then for _,b in ipairs(instruction.bin) do ins(bin, b) end
+                else instruction.asbin(bin) end
+                M.size=#bin M.cycles=M.cycles+instruction.cycles
             end
         end
         if math.type(location.size) == 'integer' then
             local endpos = location.size+location.start
-            for i=position,endpos do ins(bin, filler) end
-            position = endpos
+            for i=#bin,endpos do ins(bin, filler) end
         end
     end
     return bin
@@ -200,11 +201,17 @@ M.section = function(t)
     section.constraints = {}
     section.instructions = {}
     function section:compute_size()
-        local instructinos = self.instructions
+        local instructions = self.instructions
         local size = 0
         for _,instruction in ipairs(instructions) do
             instruction.offset = size
-            size = size + #instruction.data
+            if not instruction.size then
+                -- evaluation is needed to get the size (distinguish zpg/abs)
+                -- labels and sections are not resolved at this point, so
+                -- evaluation will fail if the size is not explicitly stated (.b/.w)
+                instruction.bin={} instruction.asbin(instruction.bin)
+            end
+            size = size + instruction.size
         end
         self.size = size
         for _,constraint in ipairs(self.constraints) do
diff --git a/asm.l65 b/asm.l65
index 1c3b679..0e5b760 100644
--- a/asm.l65
+++ b/asm.l65
@@ -19,8 +19,8 @@ lda = 5 if lda < 6 then print('yep') end
 
 local function ptr_table(label, ...)
     local vals = {...}
-    section(label .. "_lo") byte_lo(vals)
-    section(label .. "_hi") byte_hi(vals)
+    section{label .. "_lo", align=16} byte_lo(vals)
+    section{label .. "_hi", align=16} byte_hi(vals)
 end
 
 charset(" abcdefghijklmnopqrstuvwxyz-")
@@ -53,7 +53,7 @@ ptr_table("ptrs", message, data, 0)
     ldx #15,3
 
     local kernel_cycles,kernel_size
-   -- hook(\(kernel_cycles=cycles, kernel_size=size))
+    hook(function() kernel_cycles=cycles kernel_size=size end)
 
     lda data
     lda data,5
@@ -71,7 +71,7 @@ ptr_table("ptrs", message, data, 0)
     jmp (INTIM-4)
 
     -- cycles are counted without taking any branch
-    --hook(\(print('kernel cycles: ', cycles-kernel_cycles, 'kernel size: ', size-kernel_size)))
+    hook(function() print('kernel cycles: ', cycles-kernel_cycles, 'kernel size: ', size-kernel_size) end)
 
     lda function(c) return data * c end, v
     lda \c(data*c), v
diff --git a/asm.lua b/asm.lua
index e5ecea5..129c07b 100644
--- a/asm.lua
+++ b/asm.lua
@@ -53,7 +53,7 @@ section(function(o) return o+("waitForIntim") end) --alt short syntax when no ot
     ldximm (function(o) return o+(15) end,3)
 
     local kernel_cycles,kernel_size
-   -- hook(\(kernel_cycles=cycles, kernel_size=size))
+    hook(function() kernel_cycles=cycles kernel_size=size end)
 
     ldaabs(function(o) return o+( data) end)
     ldaabs(function(o) return o+( data) end,5)
@@ -71,7 +71,7 @@ section(function(o) return o+("waitForIntim") end) --alt short syntax when no ot
     jmpind (function(o) return o+(INTIM-4) end)
 
     -- cycles are counted without taking any branch
-    --hook(\(print('kernel cycles: ', cycles-kernel_cycles, 'kernel size: ', size-kernel_size)))
+    hook(function() return print('kernel cycles: ', cycles-kernel_cycles, 'kernel size: ', size-kernel_size) end)
 
     ldaabs( function(c) return data * c end, v)
     ldaabs( function(c) return data*c end, v)