; SX28.INC - Standard Header file for SX18 (Scenix 18 and 20-pin chips)

;;; 11/04/98  Chuck Glenn - Initial version

;;; 11/25/98  Chuck Glenn - modified OPTION keywords to be AND'd together

; "destination" for commands taking "d" as second parm

W                 equ      $00
F                 equ      $01

; special-function registers

INDF              equ      $00
RTCC              equ      $01
PCL               equ      $02
STATUS            equ      $03
FSR               equ      $04
PORTA             equ      $05
PORTB             equ      $06
PORTC             equ      $07

; bit #s within the STATUS register

PA2               equ      $07  ; you really should use the BANK command instead...
PA1               equ      $06  ; you really should use the BANK command instead...
PA0               equ      $05  ; you really should use the BANK command instead...
TO                equ      $04
PD                equ      $03
Z                 equ      $02
DC                equ      $01
C                 equ      $00

; values within the OPTION register.  AND them together as needed

RTW               equ      $7F
RTE_IE            equ      $BF
RTS               equ      $DF
RTE_ES            equ      $EF
PSA               equ      $F7
PS2               equ      $FB
PS1               equ      $FD
PS0               equ      $FE

; possible values for FUSE.  OR them together as needed

_TURBO_ON         equ      $000
_TURBO_OFF        equ      $800
_SYNC_ON          equ      $000
_SYNC_OFF         equ      $400
_OPTIONX_ENABLE   equ      $000
_OPTIONX_DISABLE  equ      $200
_STACKX_ENABLE    equ      $000
_STACKX_DISABLE   equ      $100
_IRC_ENABLE       equ      $000
_IRC_DISABLE      equ      $080
_IRC_4MHZ         equ      $000
_IRC_2MHZ         equ      $010
_IRC_1MHZ         equ      $020
_IRC_500KHZ       equ      $030
_IRC_250KHZ       equ      $040
_IRC_125KHZ       equ      $050
_IRC_62KHZ        equ      $060
_IRC_31KHZ        equ      $070
_CP_ON            equ      $000
_CP_OFF           equ      $008
_WDTE_DISABLE     equ      $000
_WDTE_ENABLE      equ      $004
_LP_OSC           equ      $000
_HS_OSC           equ      $001
_XT_OSC           equ      $002
_RC_OSC           equ      $003

; possible values for the MODE command, to be followed in code by TRIS command

CMP               equ      $08
WKPND             equ      $09
WKED              equ      $0A
WKEN              equ      $0B
ST                equ      $0C
LVL               equ      $0D   ; level selection
PLP               equ      $0E   ; pull-up enable
DIR               equ      $0F   ; direction (0 = output, 1 = input)

; default values for special registers -- specify again yourself to override

FUSE              equ      $0FFF
                  org      FUSE
                  mem      _TURBO_ON | _SYNC_OFF | _OPTIONX_ENABLE | _STACKX_ENABLE | _IRC_ENABLE | _IRC_4MHZ | _CP_OFF | _WDTE_DISABLE

; put a nop at the "power on" memory location, so it will roll over to $0000; org here again to over-write

                  org      $07FF
                  nop
                  org      0