Technical Information 1-9
The system board's four SIMM sockets are assigned as banks A and B. Each SIMM kit
is inserted into a pair of sockets or bank. Bank A consist of sockets J28 and J27, and in
the desktop version can only accommodate low profile (1-, 2-, and 4-MB) SIMM sticks.
Bank B consist of sockets J25 and J26. Different size SIMMs cannot be intermixed
within a bank. See Section 3, Options, for installation instructions and SIMM memory con-
figurations.
Interrupt Controller
The interrupt controller operates as an interrupt manager for the entire AT system environ-
ment. 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 listed in Table Section 1-7. Interrupt-level assignments 0 through 15
are in order of decreasing priority. See Section 2, Setup and Configuration, for information
on changing the interrupts using Setup.
Table Section 1-7 Interrupt Level Assignments
Interrupt Priority
Interrupt Device
IRQ00
Counter/Timer
IRQ01
Keyboard
IRQ02
Cascade (INT output from slave)
IRQ03
COM2*
IRQ04
COM1*
IRQ05
Parallel Port 2
IRQ06
Diskette Drive Controller*
IRQ07
Parallel Port 1*
IRQ08
Real-time clock
IRQ09
Available
IRQ10
Available
IRQ11
Available
IRQ12
PS/2 mouse*
IRQ13
Coprocessor
IRQ14
Primary IDE (fast)
IRQ15
Secondary IDE (standard)
*Industry standard locations
Summary of Contents for POWERMATE P60D - SERVICE
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