[symbols]
$1800=VIA1BData
$1801=VIA1AData
$1802=VIA1BDataDirection
$1803=VIA1ADataDirection
$1804=VIA1Timer1Low
$1805=VIA1Timer1High
$1806=VIA1Timer1StartLow
$1807=VIA1Timer1StartHigh
$1808=VIA1Timer2Low
$1809=VIA1Timer2High
$180D=VIA1InterruptStatus
$180E=VIA1InterruptEnable