Multimedia Components; Quad-Speed Cd-Rom; Sound Board; Speakers - NEC PowerMate VP75 User Manual

1-18 Technical Information

MULTIMEDIA COMPONENTS

Systems configured for multimedia come with a quad-speed CD-ROM reader, sound board, a
pair of speakers, and microphone. The following subsections briefly describe each. Information
on attaching the speakers and microphone is in Section 2, Setup and Operation.

Quad-Speed CD-ROM

The IDE quad-speed CD-ROM reader is pre-installed as drive E on multimedia configurations.
Operation of the reader is described in Section 2, Setup and Configuration. The CD-ROM
reader can be used to load programs from a CD or it can be used to play audio CDs. The CD-
ROM reader is connected to the secondary IDE/PCI port on the system board.

Sound Board

The sound board is a Creative Labs Sound Blaster™ Audio Card. The sound board is installed
in the ISA/PCI backboard. System settings for the sound board can be found in a sound board
directory on the computer's hard disk drive. For information on changing the sound board set-
tings, see Appendix D in this manual and the Creative Labs Multimedia Audio Card User's
Guide that comes with the computer.
The sound board uses 16-bit DMA data transfer and has software addressable IRQs and DMAs
for versatility. External connectors accept speakers or headphones, a microphone, stereo input,
and a musical instrument digital interface (MIDI) or joystick attachment. The speaker jack offers
a four-watt (RMS)/channel amplifier. The joystick port allows a full
duplex MIDI.
The advanced frequency modulation (FM) stereo synthesizers use a 16-bit digital-to-analog-
converter (DAC) with four operator FM sounds and twenty stereo voices. The sound board pro-
vides digital sampling up to 44 kHz and playback with dynamic filtering from 2 to 44 kHz. The
sound board is fully compatible with the ADLib™ software library.
Connectors for the board are shown in Section 2, Setup and Operation. See Appendix A for
connector pin assignments.

Speakers

The multimedia systems come with a pair of high-quality speakers, AC adapter, and connecting
wires. The speaker set features a volume control, treble boost, bass boost, and a power-on but-
ton. The speakers connect to the speaker jacks on the back of the system unit. Speaker features
are as follows.
n
3-inch magnetically shielded full-range speakers for monitor, drive, and disc protection
n
Bass (DXBB) boost switch