Address Bus
SA23-SA0 (System Address Lines)
LA23-LA17 (Unlatched Address Lines)
Data Bus
SD15-SD0 (System Data Lines)
Control Signals
BALE (Buffer Address Latch Enable)
MEMCS16 (16-bit Memory Device)
IOCS16 (16-bit I/O Device)
nIOCHCK (IO Transfer Error Condition)
IOCHRDY (Input)
AEN (Address Enable)
SBHE (System Byte High Enable)
CLK (System Clock)
OSC (Output)
OWS (Zero Wait State Condition)
nMEMW (Memory Write)
nMEMR (Memory Read)
nSMEMW (Output)
nSMEMR (Output)
nIOW (I/O Write)
nIOR (I/O Read)
RESETDRV (System Reset)
Interrupt Signals
IRQ (Interrupt Request)
High priority
IRQ9
(highest)-12
IRQ13 (not available for IO devices)
IRQ14-15
Low priority
IRQ3-7
(lowest)
IRQ8 (used for real-time clock)
DMA Signals
nDACK (DMA Acknowledge)
DRQ (DMA Request)
TC (Terminal Count )
nMASTER
nREFRESH