HP Digital AlphaStation 255 Family User Information page 121

Introduction
This appendix lists system device mapping information, including:
•
I/O address map
•
Interrupt map
•
DMA (direct memory access) channel assignments
•
SCSI (small computer system interface) ID assignments
I/O Address Map
Table C–1 presents information on the I/O address map.
Table C–1: I/O Address Map
ISA I/O
Addresses
0060-0064
0070-0071
02F8-02FF
0378-037F
03F0-03F7
03F8-03FF
0530-0533
Devices
Keyboard and mouse
Time-of-year clock
Serial port 2
Parallel port
Floppy disk
Serial port 1
Audio subsystem base address
Device Mapping
C
C–1