( iigs )

( i/o )

$c022 constant iigs.screen
$c023 constant iigs.vgcint

$c029 constant iigs.newvideo
  $0 constant newvideo.latchbank
  $5 constant newvideo.mono
  $6 constant newvideo.linearization
  $7 constant newvideo.shr

$c032 constant iigs.vgcintclear

$c034 constant iigs.border
( 11110000: rtc control  )
( 00001111: border color )

$c035 constant iigs.shadow

$c036 constant iigs.speed
  $0 constant speed.slot4detect
  $1 constant speed.slot5detect
  $2 constant speed.slot6detect
  $3 constant spped.slot7detect
  $4 constant speed.shadowall
  $6 constant speed.poweron
  $7 constant speed.fast

$c068 constant iigs.state

( firmware )

$fe1f constant idroutine

