diff --git a/src/kernel/cstartup.s b/src/kernel/cstartup.s
index 5bab4fa..89149ae 100755
--- a/src/kernel/cstartup.s
+++ b/src/kernel/cstartup.s
@@ -40,29 +40,15 @@ __program_root_section:
               txs                   ; set stack
               lda     ##_DirectPageStart
               tcd                   ; set direct page
-#ifdef __CALYPSI_DATA_MODEL_SMALL__
-              lda     ##0
-#else
               lda     ##.word2 _NearBaseAddress
-#endif
               stz     dp:.tiny(_Vfp+2)
               xba                   ; A upper half = data bank
               pha
               plb                   ; pop 8 dummy
               plb                   ; set data bank
 
-#ifdef  __CALYPSI_CODE_MODEL_COMPACT__
-              jmp     long:_Trampoline_program_start
-              .section compactcode, noreorder
-_Trampoline_program_start:
-#define CODE compactcode
-#else
-#define CODE code
-#endif
-              call    __low_level_init
-
 ;;; **** Initialize data sections if needed.
-              .section CODE, noroot, noreorder
+              .section code, noroot, noreorder
               .pubweak __data_initialization_needed
               .extern __initialize_sections
 __data_initialization_needed:
@@ -77,24 +63,17 @@ __data_initialization_needed:
               call    __initialize_sections
 
 ;;; **** Initialize streams if needed.
-              .section CODE, noroot, noreorder
+              .section code, noroot, noreorder
               .pubweak __call_initialize_global_streams
               .extern __initialize_global_streams
 __call_initialize_global_streams:
               call    __initialize_global_streams
 
 ;;; **** Initialize heap if needed.
-              .section CODE, noroot, noreorder
+              .section code, noroot, noreorder
               .pubweak __call_heap_initialize
               .extern __heap_initialize, __default_heap
 __call_heap_initialize:
-#ifdef __CALYPSI_DATA_MODEL_SMALL__
-              lda     ##.sectionSize heap
-              sta     dp:.tiny(_Dp+2)
-              lda     ##.sectionStart heap
-              sta     dp:.tiny(_Dp+0)
-              lda     ##__default_heap
-#else
               lda     ##.word2 (.sectionStart heap)
               sta     dp:.tiny(_Dp+6)
               lda     ##.word0 (.sectionStart heap)
@@ -105,24 +84,9 @@ __call_heap_initialize:
               sta     dp:.tiny(_Dp+0)
               ldx     ##.word2 (.sectionSize heap)
               lda     ##.word0 (.sectionSize heap)
-#endif
               call    __heap_initialize
 
-              .section CODE, root, noreorder
+              .section code, root, noreorder
               lda     ##0           ; argc = 0
-              call    main
-              jump    exit
-
-;;; ***************************************************************************
-;;;
-;;; __low_level_init - custom low level initialization
-;;;
-;;; This default routine just returns doing nothing. You can provide your own
-;;; routine, either in C or assembly for doing custom low leve initialization.
-;;;
-;;; ***************************************************************************
-
-              .section libcode
-              .pubweak __low_level_init
-__low_level_init:
-              return
+              jsl     long:main
+              jump    exit
\ No newline at end of file