diff --git a/build/attributes.lua b/build/attributes.lua
new file mode 100644
index 00000000..438d8bfb
--- /dev/null
+++ b/build/attributes.lua
@@ -0,0 +1,115 @@
+-- Attributes are used by various parts of the board description
+-- system (for example configs and components)
+
+module( ..., package.seeall )
+local ct = require "constants"
+local sf = string.format
+
+-- Validator for a 'choice' attribute
+-- Returns the value if OK, (false, errmsg) for error
+-- Needs: attrvals - list of permitted values for this attribute
+local function validate_choice( adesc, aname, aval, comp )
+  aval = aval:lower()
+  for k, v in pairs( adesc.attrvals ) do
+    if v == aval then return v end
+  end
+  return false, sf( "invalid value '%s' for attribute '%s' of component '%s'\n", aval, aname, comp )
+end
+
+-- Validator for a 'number' attribute
+-- Returns the value if OK, (false, errmsg) for error
+-- Needs: attrtype - the number type ('int' or 'float')
+--        attrmin - minimum value (no minimum check will be performed if not specified)
+--        attrmax - maximum value (no maximum check will be performed if not specified)
+local function validate_number( adesc, aname, aval, comp )
+  aval = tonumber( aval )
+  if not aval then return false, sf( "value of attribute '%s' for component '%s' must be a number", aname, comp ) end
+  if adesc.attrtype == 'int' and math.floor( aval ) ~= aval then
+    return false, sf( "value of attribute '%s' for component '%s' must be an integer", aname, comp )
+  end
+  local minval = adesc.attrmin or aval
+  local maxval = adesc.attrmax or aval
+  if aval < minval then
+    return false, sf( "value of attribute '%s' for component '%s' must be larger than '%s'\n", aname, comp, tostring( minval ) )
+  end
+  if aval > maxval then
+    return false, sf( "value of attribute '%s' for component '%s' must be smaller than '%s'\n", aname, comp, tostring( maxval ) )
+  end
+  return aval
+end
+
+-- Validator for a log2 number attribute
+-- Works like number, but additionaly checks that the value is a power of 2
+-- Also changes the attribute value to its log2 
+local function validate_log2( adesc, aname, aval, comp )
+  local res, err = validate_number( adesc, aname, aval, comp )
+  if not res then return res, err end
+  if aval <= 0 then
+    return false, sf( "value of attribute '%s' for component '%s' must be larger than 0\n", aname, comp )
+  end
+  local thelog = math.log( res ) / math.log( 2 )
+  if thelog ~= math.floor( thelog ) then
+    return false, sf( "value of attribute '%s' for component '%s' must be a power of 2\n", aname, comp )
+  end
+  return thelog
+end
+
+-- Validator for a string attribute
+-- Return the string if OK, (false, errmsg) for error
+-- Needs: attrmaxsize - maximum size of the string
+local function validate_string( adesc, aname, aval, comp )
+  aval = tostring( aval )
+  if type( aval ) ~= "string" then
+    return false, sf( "value of attribute '%s' for component '%s' must be a string", aname, comp )
+  end
+  maxsize = adesc.attrmaxsize or math.huge
+  if #aval > adesc.attrmaxsize then
+    return false, sf( "value of attribute '%s' for component '%s' must be less than %d chars in length", aname, comp, maxsize )
+  end
+  return aval
+end
+
+-------------------------------------------------------------------------------
+-- Public interface
+
+-- Returns a new timer attribute with the given macro and default (systmr if not specified)
+function timer_attr( macro, default )
+  default = default or ct.systmr
+  return { macro = macro, default = default }
+end
+
+-- Returns a new integer number attribute with the given limits
+function int_attr( macro, minv, maxv, default )
+  return { macro = macro, default = default, validator = validate_number, attrtype = 'int', attrmin = minv, attrmax = maxv }
+end
+
+-- Returns a new integer number attribute with the given limits
+-- The generated value will be the integer's base 2 logarithm
+function int_log2_attr( macro, minv, maxv, default )
+  local t = int_attr( macro, minv, maxv, default )
+  t.validator = validate_log2
+  return t
+end
+
+-- Returns a new choice attribute with the given possible values
+function choice_attr( macro, values, default )
+  return { macro = macro, default = default, validator = validate_choice, attrvals = values }
+end
+
+-- Returns a new flow control attribute
+function flow_control_attr( macro, default )
+  default = default or ct.uart_flow.none
+  return choice_attr( macro, ct.uart_flow_vals, default )
+end
+
+-- Returns a new string attribute
+function string_attr( macro, maxsize, dfault )
+  return { macro = macro, default = default, validator = validate_string, attrmaxsize = maxsize }
+end
+
+-- Make the given attribute optional
+function make_optional( attr )
+  attr.optional = true
+  return attr
+end
+
diff --git a/build/builder.lua b/build/builder.lua
index 8e5ec403..42084318 100644
--- a/build/builder.lua
+++ b/build/builder.lua
@@ -36,14 +36,35 @@ return {
 }
 --]]
 
+--[[ platform_conf.h template
+#include various files (buf, type...)
+
+#include ELUA_CPU_HEADER
+#include ELUA_BOARD_HEADER
+#include "platform_post_config.h"
+#include "platform_generic.h"
+#include "platform_interrupts.h"
+--]]
+
 local test = {
-  cpu = 'lm3s8962',
+  cpu = 'stm32f103',
+  config = {
+    extram = { start = 0, size = 256 * 1024 },
+    vtmr = { num = 4, freq = 10 },
+    egc = { mode = "full", limit = 40 * 1024 }
+  },
   components = {
     wofs = true,
     romfs = true,
     shell = { uart = 0, speed = 115200 },
-    xmodem = true 
+    xmodem = true,
+    term = { lines = 25, cols = 80 },
+    cints = true,
+    luaints = { queue_size = 32 },
+    linenoise = { shell_lines = 10, lua_lines = 50 },
+    rfs = { uart = 1, speed = 115200, buf_size = 512 }
   }
 }
 
 print( comp.gen_config( test ) )
+
diff --git a/build/component.lua b/build/component.lua
index fb3eac9d..2c711d7a 100644
--- a/build/component.lua
+++ b/build/component.lua
@@ -5,13 +5,17 @@ module( ..., package.seeall )
 
 local sf = string.format
 local ct = require "constants"
+local at = require "attributes"
+local gen = require "generators"
+
 local components = {}
 local conf = {}
 local enabled = {}
 
-local MACRO_DEF_POS = 41
+-------------------------------------------------------------------------------
+-- Various helper functions
 
--- Enables and configures this component
+-- Enables and configures the given component
 local function config( name, data )
   local desc = components[ name ]
   local attrs = desc.attrs or {}
@@ -20,29 +24,36 @@ local function config( name, data )
     local elmeta = attrs[ attr ]
     if not elmeta then error( sf( "attribute '%s' is not defined for component '%s'", attr, name ) ) end
     if elmeta.validator then
-      if not elmeta:validator( v ) then
+      local res, err = elmeta:validator( attr, v, name )
+      if not res then
         error( sf( "'%s' is not a valid value for attribute '%s' of component '%s'", v, attr, name ) )
+      else
+        -- The validator can also change the attribute's value
+        v = res
       end
     end
-    if conf[ elmeta.macro ] then
+    if conf[ elmeta.macro ] and tostring( conf[ elmeta.macro ].value ) ~= tostring( v ) then
       print( sf( "WARNING: overriding value of '%s' from '%s' to '%s' with component '%s'", elmeta.macro,
         conf[ elmeta.macro ].value, v, name ) )
      end
     conf[ elmeta.macro ] = { desc = elmeta, value = v }
-    print( sf( "SET -> '%s' = '%s'", elmeta.macro, v ) )
+    -- print( sf( "SET -> '%s' = '%s'", elmeta.macro, v ) )
   end
   -- Set default values where needed
   for name, data in pairs( attrs ) do
-    if not conf[ name ] and data.default then
+    if not conf[ data.macro ] and data.default then
       conf[ data.macro ] = { desc = data, value = data.default }
-      print( sf( "DEFAULT -> '%s' = '%s'", data.macro, data.default ) )
+      -- print( sf( "DEFAULT -> '%s' = '%s'", data.macro, data.default ) )
     end
   end
   -- Mark this component as configured
   enabled[ name ] = true
-  print( sf( "ENABLED -> %s", name ) )
+  -- print( sf( "ENABLED -> %s", name ) )
 end
 
+-------------------------------------------------------------------------------
+-- Configuration checkers
+
 -- Helper: shell configuration consistency checker
 -- Returns 'true' if consistent, (false, errmsg) otherwise
 local function shell_confcheck( compdesc, vals )
@@ -63,27 +74,23 @@ local function shell_confcheck( compdesc, vals )
   return true
 end
 
--- Returns a new timer option with the given macro and default (systmr if not specified)
-local function timer_attr( macro, default )
-  default = default or ct.systmr
-  return { macro = macro, default = default, gen = TODO_tmr_gen }
-end
+-------------------------------------------------------------------------------
+-- Component-specific generators
 
--- Formatted print for "#define"
-local function print_define( k, v )
-  v = v or ''
-  local s = sf( "#define %s", k:upper() )
-  if v then
-    if #s < MACRO_DEF_POS then s = s .. string.rep( ' ', MACRO_DEF_POS - #s ) end
+-- Generator for the shell component
+local function shell_gen( desc, conf, generated )
+  generated._SHELL_TRANSPORT = true
+  local gstr = ''
+  local shtype = conf._SHELL_TRANSPORT.value
+  if shtype == 'serial' then
+    gstr = gstr .. gen.simple_gen( "CON_UART_ID", conf, generated )
+    gstr = gstr .. gen.simple_gen( "CON_UART_SPEED", conf, generated )
+    gstr = gstr .. gen.simple_gen( "CON_TIMER_ID", conf, generated )
+    gstr = gstr .. gen.simple_gen( "CON_FLOW_TYPE", conf, generated )
+  else
+    error "TODO: implement shell over TCP/IP generator"
   end
-  s = s .. v .. "\n"
-  return s
-end
-
--- Simple generator for an attribute
-local function simple_gen( attrname )
-  local adesc, aval = conf[ attrname ].desc, conf[ attrname ].value
-  return print_define( attrname, aval )
+  return gstr
 end
 
 -------------------------------------------------------------------------------
@@ -91,15 +98,26 @@ end
 
 -- Build all components needed by eLua, save them in the "components" table
 function init()
+  -- Serial console
+  components.sercon = { 
+    macro = 'BUILD_CON_GENERIC',
+    attrs = {
+      uart = at.int_attr( 'CON_UART_ID' ),
+      speed = at.int_attr( 'CON_UART_SPEED' ),
+      timer = at.timer_attr( 'CON_TIMER_ID' ),
+      flow = at.flow_control_attr( 'CON_FLOW_TYPE' )
+    }
+  }
+  -- TCP/IP console
+  components.tcpipcon = { macro = 'BUILD_CON_TCP' }
   -- XMODEM
   components.xmodem = {
     macro = 'BUILD_XMODEM',
-    attrs = 
-    {
-      uart = { macro = 'CON_UART_ID' },
-      speed = { macro = 'CON_UART_SPEED' },
-      timer = timer_attr( 'CON_TIMER_ID' ),
-      flow = { macro = 'CON_FLOW_TYPE', default = ct.uart_flow.none }
+    attrs = {
+      uart = at.int_attr( 'CON_UART_ID' ),
+      speed = at.int_attr( 'CON_UART_SPEED' ),
+      timer = at.timer_attr( 'CON_TIMER_ID' ),
+      flow = at.flow_control_attr( 'CON_FLOW_TYPE')
     }
   }
   -- Shell
@@ -107,13 +125,54 @@ function init()
     macro = 'BUILD_SHELL',
     confcheck = shell_confcheck,
     gen = shell_gen,
-    attrs = 
-    {
-      transport = { macro = '_SHELL_TRANSPORT', default = 'serial' },
-      uart = { macro = 'CON_UART_ID' },
-      speed = { macro = 'CON_UART_SPEED' },
-      timer = timer_attr( 'CON_TIMER_ID' ),
-      flow = { macro = 'CON_FLOW_TYPE', default = ct.uart_flow.none }
+    attrs = {
+      transport = at.choice_attr( '_SHELL_TRANSPORT', { 'serial', 'tcpip' }, 'serial' ),
+      uart = at.int_attr( 'CON_UART_ID' ),
+      speed = at.int_attr( 'CON_UART_SPEED' ),
+      timer = at.timer_attr( 'CON_TIMER_ID' ),
+      flow = at.flow_control_attr( 'CON_FLOW_TYPE' )
+    }
+  }
+  -- Term
+  components.term = {
+    macro = 'BUILD_TERM',
+    attrs = {
+      uart = at.int_attr( 'CON_UART_ID' ),
+      speed = at.int_attr( 'CON_UART_SPEED' ),
+      timer = at.timer_attr( 'CON_TIMER_ID' ),
+      flow = at.flow_control_attr( 'CON_FLOW_TYPE' ),
+      lines = at.int_attr( 'TERM_LINES' ),
+      cols = at.int_attr( 'TERM_COLS' )
+    }
+  }
+  -- C interrupt support
+  components.cints = { macro = 'BUILD_C_INT_HANDLERS' }
+  -- Lua interrupt support
+  components.luaints = {
+    macro = 'BUILD_LUA_INT_HANDLERS',
+    attrs = {
+      queue_size = at.int_log2_attr( 'PLATFORM_INT_QUEUE_LOG_SIZE', nil, nil, 32 )
+    }
+  }
+  -- Linenoise
+  components.linenoise = { 
+    macro = 'BUILD_LINENOISE',
+    attrs = {
+      shell_lines = at.int_attr( 'LINENOISE_HISTORY_SIZE_SHELL' ),
+      lua_lines = at.int_attr( 'LINENOISE_HISTORY_SIZE_LUA' ),
+      autosave_file = at.make_optional( at.string_attr( 'LINENOISE_AUTOSAVE_FNAME', '', 32 ) )
+    }
+  }
+  -- RFS
+  components.rfs = {
+    macro = 'BUILD_RFS',
+    attrs = {
+      uart = at.int_attr( 'RFS_UART_ID' ),
+      speed = at.int_attr( 'RFS_UART_SPEED' ),
+      timer = at.timer_attr( 'RFS_TIMER_ID' ),
+      flow = at.flow_control_attr( 'RFS_FLOW_TYPE' ),
+      buf_size = at.int_log2_attr( 'RFS_BUFFER_SIZE', 512 ),
+      timeout = at.int_attr( 'RFS_TIMEOUT', nil, nil, 100000 )
     }
   }
   -- ROMFS
@@ -125,18 +184,28 @@ end
 -- Generate configuration data starting from the input dictionary
 function gen_config( d )
   conf, enabled = {}, {}
+  local comps = d.components
+
+  -- Prerequisites: check for keys that might be needed in 'd', but might not be there
+  -- At the moment, we need to definer either BUILD_CON_GENERIC or BUILD_CON_TCP (but not both)
+  -- If none is defined, we default to BUILD_CON_GENERIC
+  -- If both are defined, we exit with error
+  if comps.sercon and comps.tcpipcon then
+    return nil, "serial and TCP/IP console can't be enabled at the same time"
+  elseif not comps.sercon and not comps.tcpipcon then
+    comps.sercon = true
+  end
 
   -- Step 1: interpret data in the input table
-  local comps = d.components
   if not comps then return false, "unable to find components in the board description" end
   -- Configure each component in turn, doing validation as required
   for compname, compval in pairs( comps ) do
     if not components[ compname ] then error( sf( "unknown component '%s'", compname ) ) end
-    if type( compval ) ~= "table" then
+    if type( compval ) ~= "table" and compval then
       comps[ compname ] = {}
       compval = comps[ compname ]
     end
-    config( compname, compval )
+    if compval then config( compname, compval ) end
   end
 
   -- Step 2: basic consistency check
@@ -160,7 +229,7 @@ function gen_config( d )
 
   -- Step 3: actual generation of code
   -- The default generator simply adds '#define KEY VALUE' pairs. A component can overwrite this
-  -- default verification by specifying its own 'gen' function
+  -- default generation by specifying its own 'gen' function
   -- Also, we never generate the same key twice. We ensure this by keeping a table of the
   -- keys that were already generated
   local generated = {}
@@ -172,18 +241,16 @@ function gen_config( d )
     if desc.gen then
       genstr = genstr .. desc:gen( conf, generated )
     else
-      for aname, adesc in pairs( attrs ) do
-        if not generated[ adesc.macro ] then
-          genstr = genstr .. simple_gen( adesc.macro )
-          generated[ adesc.macro ] = true
-        end
+      for aname, adesc in pairs( attrs ) do 
+        genstr = genstr .. gen.simple_gen( adesc.macro, conf, generated )
       end
     end
     -- Add the "build enable" macro
-    genstr = genstr .. print_define( desc.macro ) .. "\n"
+    if desc.macro then genstr = genstr .. gen.print_define( desc.macro ) .. "\n" end
   end
 
-  -- Step 4: take care of all "special cases"
+  -- Step 4: take care of all "special cases" (if any)
+  -- TODO: check proper sermux ID assignment for console/RFS
 
   -- All done
   return genstr
diff --git a/build/constants.lua b/build/constants.lua
index 7e86bf49..cc2b28dd 100644
--- a/build/constants.lua
+++ b/build/constants.lua
@@ -12,6 +12,11 @@ uart_flow =
   rtscts = '( PLATFORM_UART_FLOW_RTS | PLATFORM_UART_FLOW_CTS )'
 }
 
+uart_flow_vals = {}
+for k, v in pairs( uart_flow ) do
+  uart_flow_vals[ #uart_flow_vals + 1 ] = v
+end
+
 -- System timer ID
 systmr = 'PLATFORM_TIMER_SYS_ID'
 
@@ -20,3 +25,8 @@ for i = 0, 31 do
   _G[ sf( 'vtmr%d', i ) ] = sf( '( VTMR_FIRST_ID + %d )', i )
 end
 
+-- Add a sufficient number of virtual UARTs
+for i = 0, 31 do
+  _G[ sf( 'vuart%d', i ) ] = sf( '( SERMUX_SERVICE_ID_FIRST + %d )', i )
+end
+
diff --git a/build/generators.lua b/build/generators.lua
new file mode 100644
index 00000000..b80ea85f
--- /dev/null
+++ b/build/generators.lua
@@ -0,0 +1,27 @@
+-- Code generators for various attributes and other constructs
+
+module( ..., package.seeall )
+local sf = string.format
+
+local MACRO_DEF_POS = 41
+
+-- Formatted print for "#define"
+function print_define( k, v )
+  v = v or ''
+  local s = sf( "#define %s", k:upper() )
+  if v then
+    if #s < MACRO_DEF_POS then s = s .. string.rep( ' ', MACRO_DEF_POS - #s ) end
+  end
+  s = s .. v .. "\n"
+  return s
+end
+
+-- Simple generator for an attribute
+function simple_gen( attrname, conf, gentable )
+  if gentable[ attrname ] then return '' end
+  if not conf[ attrname ] then return '' end
+  local adesc, aval = conf[ attrname ].desc, conf[ attrname ].value
+  gentable[ attrname ] = true
+  return print_define( attrname, aval )
+end
+
diff --git a/src/platform/lpc24xx/lpc2468.h b/src/platform/lpc24xx/lpc2468.h
new file mode 100644
index 00000000..2c820c00
--- /dev/null
+++ b/src/platform/lpc24xx/lpc2468.h
@@ -0,0 +1,35 @@
+// LPC2468 CPU definitions
+
+#ifndef __LPC2468_H__
+#define __LPC2468_H__
+
+#include "target.h"
+
+// Number of resources (0 if not available/not implemented)
+#define NUM_PIO               5
+#define NUM_SPI               0
+#define NUM_UART              4
+#define NUM_PWM               12
+#define NUM_ADC               8
+#define NUM_CAN               0
+#define NUM_TIMER             4
+
+// CPU frequency (needed by the CPU module and MMCFS code, 0 if not used)
+#define CPU_FREQUENCY         Fcclk
+
+// PIO prefix ('0' for P0, P1, ... or 'A' for PA, PB, ...)
+#define PIO_PREFIX            '0'
+// Pins per port configuration:
+// #define PIO_PINS_PER_PORT (n) if each port has the same number of pins, or
+// #define PIO_PIN_ARRAY { n1, n2, ... } to define pins per port in an array
+// Use #define PIO_PINS_PER_PORT 0 if this isn't needed
+#define PIO_PINS_PER_PORT     32
+
+#define SRAM_ORIGIN           0x40000000
+#define SRAM_SIZE             0x10000 // [TODO]: make this 96k?
+
+#define INTERNAL_FLASH_START_ADDRESS    0
+#define INTERNAL_FLASH_SIZE             ( 512 * 1024 )
+
+#endif // #ifndef __LPC2468_H__
+
diff --git a/src/platform/stm32/stm32f103.h b/src/platform/stm32/stm32f103.h
new file mode 100644
index 00000000..46601846
--- /dev/null
+++ b/src/platform/stm32/stm32f103.h
@@ -0,0 +1,40 @@
+// CPU definition file for STM32F103
+
+#ifndef __STM32F103_H__
+#define __STM32F103_H__
+
+#include "type.h"
+
+// Number of resources (0 if not available/not implemented)
+#define NUM_PIO               7
+#define NUM_SPI               2
+#define NUM_UART              5
+#define NUM_TIMER             5
+#define NUM_PHYS_TIMER        5
+#define NUM_PWM               4
+#define NUM_ADC               16
+#define NUM_CAN               1
+
+u32 platform_s_cpu_get_frequency();
+#define CPU_FREQUENCY         platform_s_cpu_get_frequency()
+
+// PIO prefix ('0' for P0, P1, ... or 'A' for PA, PB, ...)
+#define PIO_PREFIX            'A'
+// Pins per port configuration:
+// #define PIO_PINS_PER_PORT (n) if each port has the same number of pins, or
+// #define PIO_PIN_ARRAY { n1, n2, ... } to define pins per port in an array
+// Use #define PIO_PINS_PER_PORT 0 if this isn't needed
+#define PIO_PINS_PER_PORT     16
+
+// Allocator data: define your free memory zones here in two arrays
+// (start address and end address)
+#define SRAM_SIZE             ( 64 * 1024 )
+#define MEM_START_ADDRESS     { ( void* )end }
+#define MEM_END_ADDRESS       { ( void* )( SRAM_BASE + SRAM_SIZE - STACK_SIZE_TOTAL - 1 ) }
+
+#define INTERNAL_FLASH_SIZE             ( 512 * 1024 )
+#define INTERNAL_FLASH_SECTOR_SIZE      2048
+#define INTERNAL_FLASH_START_ADDRESS    0x08000000
+
+#endif //#ifndef __STM32F103_H__
+