Registers in the Peripheral Interface Adapters ( 8520's (CIA's) )


8520-A8520-BNAMEEXPLANATION
BFE001BFD000PRAPeripheral data register A
BFE101BFD100PRBPeripheral data register B
BFE201BFD200DDRAData direction register A
BFE301BFD300DDRBData direction register B
BFE401BFD400TALOTIMER A low register
BFE501BFD500TAHITIMER A high register
BFE601BFD600TBLOTIMER B low register
BFE701BFD700TBHITIMER B high register
BFE801BFD800Event LSB
BFE901BFD900Event 8-15
BFEA01BFDA00Event MSB
BFEB01BFDB00No Connect
BFEC01BFDC00SDRSerial Data Register
BFED01BFDD00ICRInterrupt Control Register
BFEE01BFDE00CRAControl Register A
BFEF01BFDF00CRBControl Register B

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