NEC POWERMATE PRO2180 - SERVICE MANUAL 1997 Service Manual

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NEC POWERMATE PRO2180 - SERVICE MANUAL 1997 Service Manual Manual pdf 16 page image

1-10 Technical InformationSIMMs must be installed in pairs of the same memory type and size. Both sockets must bepopulated within a bank for the system to work. No switch or jumpers required settingwhen the memory is changed. The system BIOS automatically detects the SIMMs. See“Checking the Memory in the System” in Section 3 of the PowerMate Pro2200/2180Service and Reference Manual for the valid configurations.Interrupt ControllerThe 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 whichinterrupt routine to execute. The interrupt controller has priority assignment modes that canbe reconfigured at any time during system operations.The interrupt levels are described in Table 1-4. Interrupt-level assignments 0 through 15 arein order of decreasing priority. See Section 2 of the PowerMate Pro2200/2180 Service andReference Manual for information on changing the interrupts using the Setup Utility.Table 1-4 IRQ AssignmentsInterrupt AssignmentBASE System Multimedia SystemSCSI System0 System Timer System Timer System Timer1 Keyboard Keyboard Keyboard2 (9) Available Sound (internal on MM systems)MIDI I/OSound (internal on MM systems)MIDI I/O3 Serial Port B - Com2 Serial Port B - Com2 USB Serial Port4 Serial Port A - Com1 Serial Port A - Com1 Serial Port A - Com1 (shared)Serial Port B - Com2 (shared)5 Available Sound (internal on MM systems)Sound BlasterSound (internal on MM systems)Sound Blaster6 Floppy Disk Floppy Disk Floppy Disk7 Parallel Port - LPT1 Parallel Port - LPT1 Parallel Port - LPT18 Clock/Calendar Clock/Calendar Clock/Calendar10 USB Serial Port USB Serial Port SCSI adapter11 Video Adapter Video Adapter Video Adapter12 Mouse Mouse Mouse13 Coprocessor Coprocessor Coprocessor14 IDE port A IDE port A IDE port A15 IDE port B IDE port B IDE port B