System Memory; Interrupt Controller - NEC POWERMATE PRO2180 Manual

System Memory

The system comes with 16 MB (32 MB SCSI
configuration) of system memory. Four sockets on the
system board support up to 256 MB of high-speed memory
using industry-standard tin-plated single in-line memory
modules (SIMM).
NOTE
fast page mode (FPM) SIMMs into the SIMM
sockets.
To optimize the 64-bit memory path, install memory in
matching pairs. The system supports the following 72-pin
SIMM sticks:
T
1-MB by 32- or 36-bit SIMM (4-MB stick)
T
2-MB by 32- or 36-bit SIMM (8-MB stick)
T
4-MB by 32- or 36-bit SIMM (16-MB stick)
T
8-MB by 32- or 36-bit SIMM (32-MB stick)
T
16-MB by 32- or 36-bit SIMM (64-MB stick)

Interrupt Controller

The interrupt controller operates as an interrupt manager
for the entire system environment. The controller accepts
requests from peripherals, issues interrupt requests to the
processor, resolves interrupt priorities, and provides vectors
for the processor to determine which interrupt routine to
execute. The interrupt controller has priority assignment
modes that can be reconfigured at any time during system
operations.
3-4 Understanding System Features
You may install AVL approved, 60-ns, parity,