;********************************************************************************
; @module IO-W65C22
; @type utility
; @device Western Design - W65C22N Versatile Interface Adapter
; @details
;********************************************************************************

.ifndef INCLUDE_IOW65C22
INCLUDE_IOW65C22 = 1

; IO-CHIPS OFFSETS FOR PINS FROM BASE ADDRESS
IO_RB   = $0
IO_RA   = $1
IO_DDRB = $2
IO_DDRA = $3
IO_T1CL = $4
IO_T1CH = $5
IO_T1LL = $6
IO_T1LH = $7
IO_T2CL = $8
IO_T2CH = $9
IO_SR   = $a
IO_ACR  = $b
IO_PCR  = $c
IO_IFR  = $d
IO_IER  = $e
IO_RANH = $f  ; no handshake

    ; TODO: leave?
    .struct VIA_Pins
        RB   .byte   ; $0
        RA   .byte   ; $1
        DDRB .byte   ; $2
        DDRA .byte   ; $3
        T1CL .byte   ; $4
        T1CH .byte   ; $5
        T1LL .byte   ; $6
        T1LH .byte   ; $7
        T2CL .byte   ; $8
        T2CH .byte   ; $9
        SR   .byte   ; $a
        ACR  .byte   ; $b
        PCR  .byte   ; $c
        IFR  .byte   ; $d
        IER  .byte   ; $e
        RANH .byte   ; $f  ; no handshake
    .endstruct
.endif