Interrupt Controller; Simm Memory Upgrade Path - NEC POWERMATE P - SERVICE MANUAL 1996 Service And Reference Manual

1-10 Technical Information
Total Memory SIMM 1
8 MB 4 MB
16 MB 4 MB
16 MB 8 MB
24 MB 4 MB
24 MB 8 MB
32 MB 8 MB
32 MB 16 MB
40 MB 4 MB
40 MB 16 MB
48 MB 8 MB
48 MB 16 MB
64 MB 16 MB
64 MB 32 MB
72 MB 4 MB
72 MB 32 MB
80 MB 8 MB
80 MB 32 MB
96 MB 16 MB
96 MB 32 MB
128 MB 32 MB

Interrupt Controller

The interrupt controller operates as an interrupt manager for the entire AT 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.
The interrupt levels are described in Table 1-5. Interrupt-level assignments 0 through 15 are
in order of decreasing priority. See Section 2, Setup and Operation, for information on
changing the interrupts using Setup.
Table 1-4 SIMM Memory Upgrade Path
SIMM 2
4 MB
4 MB
8 MB
4 MB
8 MB
8 MB
16 MB
4 MB
16 MB
8 MB
16 MB
16 MB
32 MB
4 MB
32 MB
8 MB
32 MB
16 MB
32 MB
32 MB
SIMM 3 SIMM 4
Empty Empty
4 MB
Empty Empty
8 MB
4 MB
8 MB 8 MB
Empty Empty
16 MB 16 MB
4 MB
16 MB 16 MB
8 MB
16 MB 16 MB
Empty Empty
32 MB 32 MB
4 MB
32 MB 32 MB
8 MB
32 MB 32 MB
16 MB 16 MB
32 MB 32 MB
4 MB
8 MB
4 MB
4 MB
8 MB
4 MB
8 MB