;********************************************************************************
; @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
; 0301 - 0341 message to print
; 0400, 0401, 0402 dht status, dht bit, dht_bit_rot
; 0403 value offset
; 0405 - 04a0 rh high/low, temp high/low, checksum

TO_PRINT    = $300

; ARGUMENTS
; a,x,y can also be used 
ARG0   = $10
ARG1   = $11
ARG2   = $12
ARG3   = $13
ARG4   = $14
ARG5   = $15
ARG6   = $16
ARG7   = $17
ARG9   = $19
ARG10  = $1a
ARG11  = $1b
ARG12  = $1c
ARG13  = $1d
ARG14  = $1e
ARG15  = $1f

.include "io_W65C22.asm6502"
.include "utility.asm6502"

; RETURN VALUE 
; in a

IO1     = $6000
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