Description
Avance Logic DT297A40 ALS100 Plus ISA Sound Card Sound Blaster Pro Compatible
The Avance Logic DT297A40 is a 16-bit ISA sound card built around the ALS100 Plus chipset, a single-chip audio solution from Avance Logic that provides Sound Blaster Pro compatibility, OPL3 FM synthesis, and full-duplex audio. It fits the standard ISA slot found in 486 and early Pentium-era motherboards and is designed for DOS and early Windows audio playback, MIDI, and game control via the DB-15 joystick/MIDI port.
Specifications & What's Included
- Model: DT297A40 (PCB revision: DT297R4B)
- Main chipset: Avance Logic ALS100 Plus (marked 7C067TX 845I, manufactured in Taiwan)
- Bus interface: 16-bit ISA
- Sound compatibility: Sound Blaster Pro
- FM synthesis: OPL3 compatible
- Bracket connectors: DB-15 joystick/MIDI port; 3× 3.5mm audio jacks (Line Out, Line In, Mic)
- Internal header: 4-pin CD-ROM audio header
- Form factor: Half-length ISA card
- FCC ID: H6RDT3D13D
- Country of manufacture: Taiwan
- Card only — no drivers, cables, or documentation included
Applications
The ALS100 Plus was a popular low-cost ISA audio chipset of the mid-to-late 1990s, widely used on OEM and aftermarket sound cards targeting budget DOS/Windows multimedia PCs. Cards based on it were used in home PCs, small business machines, and educational computers during the ISA bus era — primarily for game audio, General MIDI playback, CD-ROM audio, and basic multimedia under MS-DOS and Windows 3.x/95/98. Sound Blaster Pro compatibility made them broadly usable with the DOS game library of the period. Today these cards are sought after by retro computing enthusiasts building or restoring period-correct 486 and early Pentium systems, where ISA bus audio and OPL3 FM synthesis are required for authentic DOS game sound. The ALS100 Plus supports the OPL3 FM synth standard that many DOS games relied on for music and effects, making it a practical choice for a retro build alongside chipsets like the ESS ES688 or OPL3-SAx.
This Avance Logic DT297A40 ALS100 Plus ISA sound card has been tested and is in good working condition. The PCB is clean with no visible damage, broken traces, or missing components. The bracket connectors — DB-15 joystick/MIDI port and 3.5mm audio jacks — appear intact. Normal light handling wear is present on the board. Please review our photos and contact us with any questions.
Warranty Information
Additional Information
Brand: |
Avance Logic |
Model: |
DT297A40 |
MPN: |
DT297A40 |
Secondary Model: |
DT297R4B |
Type: |
ISA Sound Card |
SKU: |
32606 |
Audio Chipset: |
Avance Logic ALS100 Plus (7C067TX) |
Bus Interface: |
ISA (16-bit) |
Sound Compatibility: |
Sound Blaster Pro Compatible |
FM Synthesis: |
OPL3 Compatible |
Connectors: |
DB-15 Joystick/MIDI, 3x 3.5mm Audio Jack |
CD-ROM Audio Header: |
Yes (4-pin internal header) |
Form Factor: |
Half-Length ISA Card |
Country/Region of Manufacture: |
Taiwan |
FCC ID: |
H6RDT3D13D |
Seller Notes: |
Card only; no drivers, cables, or documentation included. |
Condition Notes: |
This Avance Logic DT297A40 ISA sound card has been tested and is in good working condition. PCB is clean with no damage. Bracket connectors intact. Light handling wear present. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
