hwconfig.s

PORTB = $6000
PORTA = $6001
DDRB = $6002
DDRA = $6003

LCD_E  = %10000000
LCD_RW = %01000000
LCD_RS = %00100000

SD_CS   = %00010000
SD_SCK  = %00001000
SD_MOSI = %00000100
SD_MISO = %00000010

PORTA_OUTPUTPINS = LCD_E | LCD_RW | LCD_RS | SD_CS | SD_SCK | SD_MOSI

via_init:
  lda #%11111111          ; Set all pins on port B to output
  sta DDRB
  lda #PORTA_OUTPUTPINS   ; Set various pins on port A to output
  sta DDRA
  rts