| Please consider a donation to the Higher Intellect project. See https://preterhuman.net/donate.php or the Donate to Higher Intellect page for more info. |
Versatile Interface Adapter (VIA)
From Higher Intellect Vintage Wiki
The I/O chip that handles the Apple Desktop Bus, real-time clock, and various other control signals and interrupts. In the Macintosh II, a second VIA handles control and interrupts for RAM, SCSI, and NuBus.