6525
6525 is TRI-PORT INTERFACE manufactured by Commodore.
FEATURES
:
- 24 individually programmable 110 lines or
16 110 lines, 2 handshake lines and 5 interrupt inputs.
- Priority or non-priority interrupts
- Automatic handshaking
- pletely static operation
- Two TTL Drive Capabi Iity
- a directly addressable registers
- 1 MHz, 2MHz and 3MHz operation
6525 REGISTERS
- 000 001 010 011 100 101 110 111
RO PRA
- Port Register A R1 PRB
- Port Register B R2 PRC
- Port Register C R3...
