NEC POWERMATE PROFESSIONAL 9000 Service Manual page 27

Table 1-2 System Board Feature Components
Chip
Adaptec AIC-7895CP PCI Bus
Master Multichannel SCSI Host
Adapter
National Heceta LM79
Technical Information
Function
Two motherboard interrupts
One interrupt used for INTR input
Three general purpose interrupts
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
RAID port 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
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.
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