;;********************************************************************************
;; @file
;; @brief System header
;; @ingroup system
;; @details
;;   Variables for the current hardware setup
;;********************************************************************************

.ifndef INCLUDE_SYSTEM
INCLUDE_SYSTEM = 1

;;********************************************************************************
;; @page system_stuff More System stuff
;; @subsubsection ram_reserved Reserved RAM addresses
;;   - 00-0f - free use  (Z0-Z15)
;;   - 10-1f - arguments / return values (ARG0-ARG15)
;;   - 20-ff - free
;;   - 0100 - 01FF Stack
;;   - 0200,0201 keypad keybuffer write/read pointer
;;   - 0202-02ff keypad keybuffer
;;   - 0300 lcd character counter
;; @ingroup system
;;********************************************************************************

.include "io_W65C22.h65"
.include "utility.h65"
.importzp Z0,Z1,Z2,Z3,Z4,Z5,Z6,Z7,Z8,Z9,Z10,Z11,Z12,Z13,Z14,Z15
.importzp ARG0,ARG1,ARG2,ARG3,ARG4,ARG5,ARG6,ARG7,ARG8,ARG9,ARG10,ARG11,ARG12,ARG13,ARG14,ARG15

; Z0    = $0
; Z1    = $1
; Z2    = $2
; Z3    = $3
; Z4    = $4
; Z5    = $5
; Z6    = $6
; Z7    = $7
; Z8    = $8
; Z9    = $9
; Z10   = $a
; Z11   = $b
; Z12   = $c
; Z13   = $d
; Z14   = $e
; Z15   = $f
; ; ARGUMENTS
; ; a,x,y can also be used 
; ARG0    = $10
; ARG1    = $11
; ARG2    = $12
; ARG3    = $13
; ARG4    = $14
; ARG5    = $15
; ARG6    = $16
; ARG7    = $17
; ARG8    = $18
; ARG9    = $19
; ARG10   = $1a
; ARG11   = $1b
; ARG12   = $1c
; ARG13   = $1d
; ARG14   = $1e
; ARG15   = $1f


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

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

; charmappings for the lcd
; .charmap 'ü', $F5
; .charmap 'Ü', $F5
; .charmap 'ö', $EF
; .charmap 'Ö', $EF
; .charmap 'ä', $E1
; .charmap 'Ä', $E1
; .charmap 'ß', $E2

.endif ; include guard