Please consider a donation to the Higher Intellect project. See or the Donate to Higher Intellect page for more info.

Gravis UltraSound Plug & Play

From Higher Intellect Vintage Wiki
Jump to navigation Jump to search

The UltraSound Plug & Play sound card makes use of the highly-integrated Interwave chip developed by Advanced Micro Devices. The Interwave chip was developed as the result of a joint venture between Gravis and AMD utilizing Advanced Gravis' UltraSound audio technology. The Interwave chip is the first to provide integration of the MPC-3 multimedia requirements. This integrated technology allows Gravis to deliver more honest reproduction of sound and reduce the card's cost without sacrificing the quality of the other components.


  • Easy Windows 95 Plug & Play Setup.
  • Full Duplex-simultaneous record and playback for Internet applications and more.
  • 32-voice General MIDI wavetable sound card.
  • Hardware mixing of 32 channels for dynamic digital effects.
  • Compatible with every Windows 95 application.
  • Expandable! Add up to 8 MB RAM for custom sounds and stunning effects processing. (Pro Version comes with 512K RAM built-in.)

Superior Sound Specs

  • AMD Interwave GFA1 DDSP chip
  • 32-voice wavetable synthesizer
  • 32 channels for digital effects
  • Beyond CD-quality recording and playback at 16-bit, 48 KHz
  • Hardware mixing so you won't sacrifice game performance for good music
  • 4:1 ADPCM, A-law, and æ-law compression
  • Slots for up to 8 MB of RAM memory
  • Line In, Line Out, Mono Mic In, Atapi Enhanced IDE CD-ROM interface, CD audio, and Joystick/MPU 401 UART-compatible MIDI connectors
  • 20 Hz to 20 KHz ñ 3dB line output frequency response
  • <0.05% total harmonic distortion with an input of dbm li>>80dB signal to noise ratio (line in to line out)

Technical Specifications
Hardware Required IBM 486 SX-33 or better, Hard Drive (30MB free), CD-ROM
Onboard Memory 1MB of ROM (expandable to 8MB of RAM)
System Required DOS 5.0 or greater - Microsoft compatible mouse - VGA and Windows™ '95 recommended - 16-bit bus slot
Digital Audio 8- and 16-bit
Digital Stereo Channels: 16
Voices 32
Digital Recording 8- or 16-bit (stereo)
Variable Sample Rates 2 to 48 KHz
MIDI Support Industry standard (MPU401-6850 UART)- 192 General MIDI patches included
MIDI Connectors In, Out, Through with optional MIDI Adapter
Card Connectors 15-pin joystick & MIDI connector - 3 jacks for audio line out, audio line in and microphone in internal CD-audio line in - IDE CD-ROM Interface
Warranty Three years


When I hook up my CD-ROM to the PnP, I can't use my CD-ROM. Why??

In Win 95, this is because Windows 95 could not resolve conflicts. To fix this, you must go into Control Panels -> System -> Device Manager -> Hard Disk Controllers. Click on the last device in that list and click the Properties Button. You must then click on the Resources tab. At this point, it says that you must set the resources manually, so click on the Set Resources Manually button. You then can uncheck the 'Automatic Configuration' box and select the resource that needs to be changed (Base Port, IRQ ) until it no longer conflicts. When you are done, click OK, and click OK again when asked to.

In DOS, you must make sure that you initialize the PnP in the Config.sys. To do this, make sure that you place this line BEFORE your CD-ROM driver. To be safe, make sure this line is first (or second if you have a Hard Disk Manager being loaded). The line is:

Device=c:\ultrapnp\IWINIT.exe -bbios ID=GRV00001 Interwave=C:\ultrapnp\iw.ini

The above line assumes you have installed the software in C:\ULTRAPNP. Make changes to match your drive \ directory if necessary.

Jumper Settings

If you have the PnP, then you only have one jumper (JP9). It is to determine what mode the card is in. (By default, it is in Plug & Play Mode. If the jumper is set, the card is no longer in Plug & Play mode. This means that Plug and Play BIOS's (and Win 95) will not automatically detect the card. Do not change this jumper as this function is not working yet. This will be fixed in a later release of the drivers.

If you have the PnP Pro, you also have a set of jumpers directly beside the IDE port. These jumpers tell the card the amount of memory it can address. By default, it addresses up to 4.5 megs (512k base RAM and 4 MB in SIMMs). The Jumper blocks cover 3-4, 7-8,& 9-10. ( :|:|| )

If you put on 8 MB in the SIMM slots, you must make sure that jumper 1-2 and 5-6 ONLY.. (All others are removed) ( |:|:: )

See Also