--- a/src/external_flash.asm	Wed Jan 31 19:39:37 2018 +0100
+++ b/src/external_flash.asm	Sat Feb 03 13:36:02 2018 +0100
@@ -341,76 +341,4 @@
 	movf		SSP2BUF,W			
 	return	; Returns RX data in WREG and SSP2BUF
 
-    global      fix_180_dives
-fix_180_dives:           ; fix dives made with the 1.80
-    clrf    divesecs    ; Here: # of dive (0-255) in TOC
-fix_180_dives2:
-    rcall   fix_load_dive_into_buffer   ; Load header #divesecs into buffer:256
-    rcall   fix_check_buffer            ; Check the buffered dive
-    tstfsz  WREG                ; Dive needs fix?
-    rcall   fix_buffered_dive   ; Yes, fix and save it
-    decfsz  divesecs,F          ; All done?
-    bra     fix_180_dives2      ; No, continue
-    return                      ; All done.
-
-fix_buffered_dive:           ; Yes, fix and save it
-    rcall	ext_flash_disable_protection	; Disable write protection for external flash
-    banksel buffer
-    ; Set to 1.81
-    movlw   .81
-    movwf   buffer+.49
-    ; Fix wrong profile length
-    movlw   .3
-    subwf	buffer+.9,F
-    movlw	d'0'
-    subwfb	buffer+.10,F
-    subwfb	buffer+.11,F
-    banksel common
-    ; save result into external flash again
-    rcall   fix_set_to_toc_start
-    clrf    lo
-    lfsr    FSR0,buffer+0
-fix_buffered_dive2:
-    movf    POSTINC0,W
-    rcall   write_byte_ext_flash_plus_header; Write from WREG and increase address after write
-    decfsz  lo,F                            ; All done?
-    bra     fix_buffered_dive2              ; No, continue
-    return
-
-fix_check_buffer:            ; Check the buffered dive
-    movff   buffer+.48,temp1
-    movlw   .1
-    cpfseq  temp1           ; buffer+.48 = .1 ?
-    retlw   .0              ; No, abort
-    movff   buffer+.49,temp1
-    movlw   .80
-    cpfseq  temp1           ; buffer+.49 = .80 ?
-    retlw   .0              ; No, abort
-    retlw   .1              ; Yes, fix this dive
-
-fix_load_dive_into_buffer:  ; Load header #divesecs into buffer:256
-    rcall   fix_set_to_toc_start
-    clrf    lo
-    lfsr    FSR0,buffer+0
-fix_load_dive_into_buffer2:
-    rcall   ext_flash_byte_read_plus    	; increase address after read
-    movff   temp1,POSTINC0                  ; copy into buffer
-    decfsz  lo,F                            ; All done?
-    bra     fix_load_dive_into_buffer2      ; No, continue
-
-fix_set_to_toc_start:
-    clrf    ext_flash_address+0
-    clrf    ext_flash_address+1
-    movlw   0x20
-    movwf   ext_flash_address+2
-    movlw   .16
-    mulwf   divesecs; divesecs*16 = offset to 0x2000 (up:hi)
-    movf    PRODL,W
-    addwf   ext_flash_address+1,F
-    movf    PRODH,W
-    addwfc  ext_flash_address+2,F
-    ; pointer at the first 0xFA of header
-    return
-
-
 	END
\ No newline at end of file

--- a/src/external_flash.inc	Wed Jan 31 19:39:37 2018 +0100
+++ b/src/external_flash.inc	Sat Feb 03 13:36:02 2018 +0100
@@ -12,8 +12,7 @@
   extern	incf_ext_flash_address_p1	; +1 for the ext_flash_address:3
  extern ext_flash_disable_protection; Disables write protection
  extern	ext_flash_enable_protection	; Enables write protection
- extern fix_180_dives               ; fix dives made with the 1.80
-
+ 
 ; Writes
  extern	write_byte_ext_flash_plus	; Write from WREG and increase address after write with banking at 0x200000
  extern write_byte_ext_flash_plus_nocnt ; No increase of ext_flash_dive_counter:3

--- a/src/hwos.inc	Wed Jan 31 19:39:37 2018 +0100
+++ b/src/hwos.inc	Sat Feb 03 13:36:02 2018 +0100
@@ -239,8 +239,8 @@
 #DEFINE compass_averaging           .10         ; numbers of extra averaging
 
 ; Hardware defines
-#DEFINE battery_gauge_available	hardware_flag,0	; OSTC has rechargeable battery with battery management chip
-#DEFINE ambient_sensor			hardware_flag,1	; OSTC has an ambient sensor
+#DEFINE battery_gauge_available		hardware_flag,0	; OSTC has rechargeable battery with battery management chip
+#DEFINE ambient_sensor			hardware_flag,1	; OSTC has an ambient light sensor
 #DEFINE analog_o2_input			hardware_flag,2	; OSTC has analog inputs and S8 digital
 #DEFINE optical_input			hardware_flag,3	; OSTC has an digital optical input
 #DEFINE ble_available			hardware_flag,4	; OSTC has an BLE module
@@ -248,6 +248,17 @@
 ;unused
 ;unused
 
+; Hardware flag byte:
+; BIT0 = OSTC has rechargeable battery with battery management chip
+; BIT1 = OSTC has an ambient light sensor
+; BIT2 = OSTC has analog inputs and S8 digital
+; BIT3 = OSTC has an digital optical input
+; BIT4 = OSTC has an BLE module
+; BIT5 = OSTC_RX circuity present
+; BIT6 = unused
+; BIT7 = unused
+	
+	
 ;---------------------------- Macros ------------------------------------
 
 TSTOSS  macro opt_reg           ; TeST Option Skip if not Zero

--- a/src/start.asm	Wed Jan 31 19:39:37 2018 +0100
+++ b/src/start.asm	Sat Feb 03 13:36:02 2018 +0100
@@ -242,8 +242,6 @@
     lfsr    FSR0,oPressureAdjust
     call    option_save             ; Save in EEPROM
 
-    call    fix_180_dives           ; fix dives made with the 1.80
-
     rcall   backup_flash_page       ; backup the first 128bytes from flash to EEPROM
 
 	movlw	d'1'					; store current version in EEPROM