;********************************************************************************
; @module system
; @type header
; @details
;   Variable definitions for the current hardware setup
;********************************************************************************

.ifndef INCLUDE_SYSTEM
INCLUDE_SYSTEM = 1
; reserved RAM addresses
; 00-0f - free
; 10-1f - arguments / return values
; 20-ff - free
; 0100 - 01FF Stack
; 0200,0201 keybuffer write/read pointer
; 0202-02ff keybuffer
; 0300 lcd character counter
; 0400, 0401, 0402 dht status, dht bit, dht_bit_rot
; 0403 value offset
; 0405-04a0 rh high/low, temp high/low, checksum

.include "io_W65C22.h65"
.include "utility.h65"

; ARGUMENTS
; a,x,y can also be used 
.segment "ZEROPAGE"
ARG0:   .res 1
ARG1:   .res 1
ARG2:   .res 1
ARG3:   .res 1
ARG4:   .res 1
ARG5:   .res 1
ARG6:   .res 1
ARG7:   .res 1
ARG9:   .res 1
ARG10:  .res 1
ARG11:  .res 1
ARG12:  .res 1
ARG13:  .res 1
ARG14:  .res 1
ARG15:  .res 1


; RETURN VALUE 
; in a

.segment "VIA1"
; IO1:    .res 16
IO1     = $6000

.segment "VIA2"
; IO2:    .res 16
IO2     = $7000

; struct method
    ; .org $6000
; VIA1:   .tag VIA_Pins
    ; .org $7000
; VIA2:   .tag VIA_Pins

; ; IO-1
; PB1     = $6000
; PA1     = $6001
; DDRB1   = $6002
; DDRA1   = $6003
; T1L1    = $6004
; T1H1    = $6005
; ; IO-2
; PB2     = $7000
; PA2     = $7001
; DDRB2   = $7002
; DDRA2   = $7003
; T1L2    = $7004
; T1H2    = $7005
; ACR2    = $700b
; PCR2    = $700c
; IFR2    = $700d
; IER2    = $700e


.endif ; include guard