Creative Sound Blaster 16 ASP
The Sound Blaster 16 ASP is an enhancement to the original SB16 that introduces a signal processing chip. This was supposed to provide hardware compression and decompression of audio, however it proved to be a short-lived addition as later cards dropped this capability - presumably due to increasing CPU speeds and the fact that the majority of audio was synthesised in real-time (e.g. in games) rather than being pre-recorded.
Additional photos
Creative Sound Blaster 16 ASP underside.jpg
Jumpers
| I/O address |
IOS0 |
IOS1
|
| 220h |
Closed |
Closed
|
| 240h |
Open |
Closed
|
| 260h |
Closed |
Open
|
| 280h |
Open |
Open
|
| IRQ |
IS0 |
IS1
|
| 2 |
Closed |
Closed
|
| 5 |
Open |
Closed
|
| 7 |
Closed |
Open
|
| 10 |
Open |
Open
|
| Low DMA |
DAS0 |
DAS1
|
| 0 |
Closed |
Closed
|
| 1 |
Open |
Closed
|
| 3 |
Closed |
Open
|
| Disabled |
Open |
Open
|
| High DMA |
DBS0 |
DBS1
|
| 5 |
Closed |
Closed
|
| 6 |
Open |
Closed
|
| 7 |
Closed |
Open
|
| Use low DMA |
Open |
Open
|
| CSP chip |
IFSD |
APSD
|
| Disabled |
Closed |
Closed
|
| N/A |
Open |
Closed
|
| N/A |
Closed |
Open
|
| Enabled |
Open |
Open
|
| MIDI I/O address |
MSEL
|
| 330h |
Closed
|
| 300h |
Open
|
| MPU-401 emulation |
MFBEN
|
| Enabled |
Closed
|
| Disabled |
Open
|
| Gameport |
JYEN
|
| Enabled |
Closed
|
| Disabled |
Open
|
| CT17xx amplifier |
OPSL |
OPSR
|
| Enabled |
2-3 |
2-3
|
| Disabled |
1-2 |
1-2
|
Presumably when the amplifier is enabled the output jack becomes a "speaker out", whereas a disabled amplifier will change the jack to a "line out" with the volume control nonfunctional, with presumably less noise on the output also.
| Unknown |
AUDIO_PWB (JP14)
|
| Default |
6-7
|
| Unknown |
RSPK_EN
|
| Default |
Closed
|
| ? |
Open
|
Other connectors
