Commodore Amiga A2000 - Page 322

********** PART 4 - PORT SIGNAL ASSIGNMENTS FOR 8520 ************
Address BFFR01 data bits 7-0 (A12*) (int2)
------------------------------------------
PA7..game port 1, pin 6 (fire button*)
PA6..game port 0, pin 6 fire button*)
PA5..RDY* disk ready*
PA4..TK0* disk track 00*
PA3..WPRO* write protect*
PA2..CHNG* disk change*
PAl..LED* led light (0=bright) / audio filter control (A500 & A2000)
PA0..OVL ROM/RAM overlay bit
SP...KDAT keyboard data
CNT..KCLK keyboard clock
PB7..P7 data 7
PB6..P6 data 6
PB5..P5 data 5 Centronics parallel interface
PB4..P4 data 4 data
PB3..P3 data 3
PB2..P2 data 2
PBl..P1 data 1
PB0..P0 data 0
PC...drdy* Centronics control
F....ack*
Address BFDRFE data bits 15-8 (A13*) (int6)
PA7..com line DTR*, driven output
PA6..com line RTS*, driven output
PA5..com line carrier detect*
PA4..com line CTS*
PA3..com line DSR*
PA2..SEL Centronics control
PA1..POUT +--- paper out -------------+
PA0..BUSY | +--busy-----------------+ |
| | | |
SPBUSY | +- commodore serial bus-+ |
CNT..POUT + --commodore serial bus ---+
PB7..MTR* motor
PB6..SEL3* select external 3rd drive
PB5..SEL2* select external 2nd drive
PB4..SEL1* select external 1st drive
PB3..SEL0* select internal drive
PB2..SIDE* side select*
PB1..DIR direction
PB0..STEP* step*
PC...not used
F....INDEX* disk index pulse*
- Appendix E 313 -