Usage in [[Aleste 520EX - I/O Ports]]:
Uses a russian KR512WI1 chip (which is, according to the Aleste's
Manual) compatible to western MC146818 chips. Connects to a 32.768kHz crystal. Connects to the PPI. : PPI Port A.Bit0-7 =Data bus PPI Port C.Bit0 = Read/Write (0=Write, 1=Read) PPI Port C.Bit1 =ControlIndex Access (0=No, 1=Access) PPI Port C.Bit2 = Data Access (0=No, 1=Access)
In the Aleste's Ext Port, the RTC must be enabled, and PSG and
8253 must be disabled.