Assessments - 5, GPA: 3.8
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to 9,144 ft.) (-182 ft. to 30,480 ft.) Shock 10G; 1.5G with 60G; 50G with DVD-ROM drive DVD-ROM drive installed installed Vibration 0.5G; 0.25G with 1G; 1G with DVD-ROM DVD-ROM drive drive installed installed Part III: Appendixes Features and Specifications Features and Specifications Part III: Appendixes Appendix Appendix Power Cable ble Connectors The computer features a universal power supply you can use worldwide. This appendix shows the shapes of the typical AC power cable connectors for various parts of the world. USA and Canada United Kingdom UL approved BS approved CSA approved Australia Europe VDA approved AS approved NEMKO approved 217 Appendix Appendix IRQ level assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 DMA channel assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 Input/output port address assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . 221 System System This appendix lists the IRQ levels, DMA channels and I/O port addresses. IRQ level assignments The direct line to the CPU is called an Interrupt ReQuest (IRQ) level or channel. You’ll hear both terms used by technical experts. They mean the same thing. The following table lists the default IRQ level assignments for the computer: IRQ Use Notes 0 Timer 1 Keyboard 2 PIC #2 3 Modem COM port, modem 4 COM COM port, modem 5 Sound system COM port, printer, modem, ECP, MPU* 219 System Resources System Resources IRQ Use Notes 6 3.5-inch diskette drive 7 LPT1 COM port, modem, ECP, sound system, or MPU* 8 Real-time clock 9 Not Available Reserved for system 10 Available COM port, sound system, MPU, modem 11 External PCI bus Modem, sound system, FIR, or MPU* 12 PS/2 mouse 13 Math coprocessor 14 Hard disk CD-ROM, secondary hard disk 15 CD-ROM CD-ROM, SelectBay * MPU401 in Desk Station V Plus, if available. DMA channel assignments Direct Memory Access (DMA) allows some devices to transfer data to and from memory at high speeds, without using the CPU. Such devices are each assigned a unique DMA channel. The computer has two DMA controllers with four channels on each controller, a total of eight DMA channels. Part III: Appendixes System Resources System Resources The following table lists the computer’s DMA channel assignments. DMA Use Notes 0 Sound system Choice for sound system 1 Sound system Choice for ECP 2 3.5-inch diskette drive 3 ECP Choice for sound system, ECP 4 Cascade from DMA channel 1 5 Reserved 6 Reserved 7 Reserved Input/output port address assignments The CPU accesses input/output devices, such as modems, by reading from them or writing to them. Each command to read or write must specify the address (in memory) for the port. Each device that communicates with the CPU must have a unique I/O port address. The following table lists the device names and their assigned I/O port addresses for the computer. Port address (h) Device/function Notes 000-01F 82C37: DMA controller 1 020-03F 82C59: PIC 1 040-05F 82C54: timer Part III: Appendixes System Resources System Resources Port address (h) Device/function 060-06F Keyboard controller 070 NMI mask register 070-07F Real-time clock 080-09F DMA page register 0A0-0BF 82C59: PIC 2 0C0-0DF 82C37: DMA controller 2 0E0-0E1 PCI bus 0F0-0F7 Math coprocessor 100-1EF VGA 170-177 CD-ROM (secondary IDE controller) 1F0-1FF Hard disk controller (primary IDE controller) 200 Joy stick 202-21F Not used 220-22F SoundBlaster Pro 240-24F Not used 260-277 Not used 278-27F Parallel PRT 2 Notes 060 and 064 for controller 061 for system status port Available for sound system Part III: Appendixes System Resources System Resources Port address (h) Device/function 280-2E7 Not used 2E8-2EF Serial port, or built-in modem (COM4) 2F0-2F7 Not used 2F8-2FF Serial port, infrared port, or built- in modem (COM2) 300-33F MPU 340-35F Not used 360-37F Not used 370 Controller I/O address 376-377 Secondary IDE controller 378-37F Parallel PRT 1 380-387 Not used 388-38B Sound system OPL3 (MIDI) 38C-38F Not used 390-39F Not used 3A0-3AF Bisynchronous 1 3BC-3BE Parallel PRT 3 3C0-3DF CGA, EGA, VGA 3E2-3E3 Secondary PCMCIA controller when docked (only in PCIC mode) Notes Part III: Appendixes System Resources System Resources Port address (h) Device/function Notes 3E8-3EF Serial port, infrared port, or built- in modem (COM3) 3F0-3F7 3.5-inch diskette drive controller I/O ports 3F6 and 3F7 are used for the hard disk controller 3F8-3FF Serial port, infrared port, or built- in modem (COM1) 400-47F Not used 480-49F DMA high-page register 530-537 Windows sound system 540 Not used Available for Windows sound system E80-E87 Not used Available for Windows sound system F44-F47 Not used Available for Windows Sound System Part III: Appendixes System Resources System Resources Part III: Appendixes Appendix Appendix Video Modes Modes This appendix lists the video modes supported by the display adapter, and identifies the characteristics of each mode. The tables h...
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