18 hours ago
- The Amiga floppy controller uses four separate chips instead of a single integrated controller like the NEC765.
- Two 8520 CIAs handle control I/O: the odd CIA manages outputs from the drive (disk sensing), and the even CIA manages inputs to the drive (selection, control, stepping).
- Gary handles motor control and write data, processing signals from Paula through a NAND gate inverter.
- Paula processes read data, performs DMA, and includes a hardware digital PLL for data separation; it does not handle drive selection or motor control.