
Technical Information 1-9
Table 1-2 System Board Feature Components
Chip
Function
•
Two motherboard interrupts
•
One interrupt used for INTR input
•
Three general purpose interrupts
Adaptec AIC-7895CP PCI Bus
Master Multichannel SCSI Host
Adapter
The AIC-7895CP supports the following:
•
Narrow (8-bit, 50-pin) or Wide (16-bit,
68-pin) Fast SCSI providing 10-20 MB/sec
throughput per channel
•
Narrow (8-bit, 50-pin) or Wide (16-bit, 68-
pin) Ultra SCSI providing 20-40 MB/sec
throughput per channel
•
Burst data transfers on the PCI bus up to
the maximum rate of 133 MB/sec per
channel using the on-chip 256-byte FIFO
buffer
•
RAIDport connector interface
•
Two Wide 68-pin connectors
•
One Narrow 50-pin connector
•
Subsystem Vendor and Device ID support
•
Spin down of SCSI drive
•
SCAM (SCSI Configured Automatically)
Level 2
National Heceta LM79
Provides voltage, temperature, and security
monitoring (NEC MagicEye technology).
LM79 features include:
•
Management Level 3 functionality.
•
Integrated temperature and voltage sense
monitoring to detect levels above or
below acceptable values (+12 V, -12 V,
+5 V, -5 V, and +3.3V). When suggested
ratings for temperature, fan speed, or
voltage are exceeded, an interrupt is
activated.
•
Fan speed sensors for up to five fans with
the onboard analog multiplexer.
•
Header for an external chassis security
feature.
•
8-bit I/O map to ISA bus or access from
SMBus.