void mos8563_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
case TIMER_BLOCK_COPY:
{
UINT8 data = VSS_COPY ? read_videoram(m_block_addr++) : m_data;
write_videoram(m_update_addr++, data);
if (--m_word_count)
{
m_block_copy_timer->adjust( attotime::from_ticks( 1, m_clock ) );
}
else
{
m_update_ready_bit = 1;
}
break;
}
default:
mc6845_device::device_timer(timer, id, param, ptr);
break;
}
}
inline void abc1600_mover_device::write_videoram(offs_t offset, uint16_t data, uint16_t mask)
{
uint16_t old_data = read_videoram(offset);
space().write_word((offset & VIDEORAM16_MASK) << 1, (data & mask) | (old_data & (mask ^ 0xffff)));
}
