With Riptide RACC010, I got legacy Sound Blaster Pro support and software wavetable working in Windows 98SE, and Sound Blaster Pro support working in DOS.
There are a few variants of the PCI card:
Riptide
Model No.: 90079
This card has the optional RDSP20 Modem DSP chip. The datasheet indicates it's used only by the modem, and not the sound card, to reduce CPU usage by 50MHz.
I use Windows 98 driver rip417na.exe (VXD version 4.12.01.2156). Wavetable files aren't included, so I add them before install like this:
1. Extract the files in rip417na.exe
2. Copy Genmidi.wsl and gmram.ewa from riptide-chameleon-w982k.exe into folder AUDIO.W95
3. Run Install.exe
Chameleon
Model No.: 90079-2
This card doesn't have the optional RDSP20 Modem DSP chip.
I use Windows 98 driver riptide-chameleon-w982k.exe (VXD version 4.12.01.2156).
Riptide World
Model No.: 90083
This card has the optional RDSP20 Modem DSP chip.
I don't have this card.
AV RISER CARD
A small add-on card can be connected to add LINE-OUT, LINE-IN, and MIC jacks. It isn't necessary because the PCI card has its own audio output jack. I've seen three variants:
5064-8549 A/V RISER CARD Regular bracket for expansion slot. Adds VIDEO and S-VIDEO jacks that route to another card with a separate cable.
5064-8576 AUDIO RISER CARD Regular bracket for expansion slot.
5064-8577 AUDIO RISER CARD Different bracket for mounting somewhere else.
The riser card is connected using a cable with 8-pin JST connectors and straight-through wiring.
5183-9023 CABLE AUDIO 7-inch
5183-9100 CABLE AUDIO 12-inch
Rockwell Semiconductor spun off into a new company, Conexant. Older chips are marked with the Rockwell logo, newer chips have the Conexant logo.
A Riptide card with an earlier version of the RACC010 chip marked "D7400-11" caused trouble with an older motherboard that has the VIA Apollo Pro 133A chipset. While the Riptide card is inserted, some IDE drives are not detected. It happens whether using the onboard IDE controller or a PCI IDE card.
A Riptide card with a later RACC010 chip marked "D7400-12" does not have the problem and works well. In the BIOS, reserve IRQ5 and IRQ9 for ISA so they are used only for Sound Blaster and MIDI support, and not shared with other devices.
The earlier "D7400-11" chip works fine in a newer Intel 865G motherboard.
Device Manager in Windows 98SE has options to use the WaveStream wavetable synthesizer at 22 kHz sampling rate, or the Endless Wave synthesizer at 22 kHz or 44 kHz. Endless Wave sounds better. The software wavetable works in Windows and in DOS games launched from Windows.
MIDI through the joystick port works in Windows, but not in real DOS, and not in DOS games launched from Windows.
The card's Yamaha OPL3 FM compatibility sounds pretty good.
Enabling the amplifier can improve sound quality:
In Windows, Open Volume Controls
Options > Advanced Controls
Click the Advanced button under Master Volume
Check the box for Stereo Enhance
Muting Speakerphone can reduce noise.
Installing the Windows 98 driver creates a batch file to enable Sound Blaster Pro support in real DOS.
Run `C:\Windows\SYSTEM\ripleg.bat /unmute /v`
It loads RIPUTIL.EXE which consumes 1KB of memory.
The driver doesn't include a mixer to adjust the volumes in DOS.
I think the card is fun to try in Windows 98. The legacy Sound Blaster Pro and software wavetable worked well in DOS games launched from Windows.
I didn't like the card in real DOS where the volume was too loud and the wavetable isn't available.