ErgoPro e-, x- and s- Series PC Specialist's Handbook
Page 62 First Edition, Release 4 - June 1998
Audio
x251/451/651
s450/133n and s650/133
The on-board (system board) audio interface is controlled by the ESS688 Audiodrive and Yamaha YMF262
synthesiser chips. This combination makes the audio interface Soundblaster Pro compatible (OPL3) with
following external/internal connections:
- mono microphone input
- stereo CD-ROM drive audio inputs
- stereo headphone output (2*75mW/32Ohm) for headphones or active speakers
The maximum audio sample frequency is 44.1kHz, 8/16-bits per channel.
The audio chips are connected to the system via 8-bit wide ISA interface. This interface, when enabled, reserves
one IRQ (5, 7, 9, 10), one DMA (None, 0, 1, 3), and one I/O (220-22F, 240-24F) channel.
Audio interface can be disabled through the Resident SETUP Utility.
x451/XXXs and x651/XXXs
The Aztech MM-PRO16IIA 3D is a Sound Blaster Pro compatible non PnP 16-bit ISA audio board (one ISA slot is
occupied). It offers three input channels (in stereo) 16-bit 44.1kHz stereo sound, full duplex communication
over internet phone software and 3D surround sound effects. An optional wave-table synthesis module is
available to produce realistic instrument sounds.
External/internal connections
External Internal
Inputs Mono microphone
Stereo line-in
Midi/game port
Stereo CD-ROM drive audio inputs
outputs Stereo line-out
Stereo speaker
Factory default settings
IRQ DMA I/O (hex)
5, 9 and 10 0 and 1 200 - 207, 220 - 22F, 300 -
301, 388 - 38B, 530 - 537
and 610 - 61F
Use Aztech preparation disk to set the factory default values (Genesis external EX0003344)
Floppy disk controller
The floppy disk controller is 82077AA-compatible (both software and register level). It can handle the following
floppy drive types: 360kB, 1.2MB, 720kB, 1.44MB and 2.88MB.
The floppy controller is placed in the: SMC FDC37C665GT
Floppy interface can be disabled through the Resident SETUP Utility.
Serial port communication
It comprises 2 high speed NS16C550 compatible UARTs with send/receive 16 Byte FIFOs. The 2 connectors are
9-pin standard RS-232C D-type connectors. Port receivers (SN75C185) are set to FAIL-SAFE mode. The
UARTs are placed in the SMC FDC37C665GT.
The maximum transfer speed supported by the BIOS functions is 19200b, and by the HW 115kb.
Instant on-function wakes up the system when the modem generates the Ring Indicator signal, this function is
available on serial port 1.
The on-board serial ports can be configured to COM1 or COM2, they can be disabled through the Resident Set-
up Utility.
To Next Page
Loading...
Need help?
General