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Hardware:Sound-Blaster:DSP-commands:0xE1.asciidoc

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DSP command

0xE1

Supported on

all versions, most clones

Description

Return DSP version

How to use

DSP_Write(0xE1);
major = DSP_Read();
minor = DSP_Read();

Write command 0xE1. The two bytes returned by the DSP are the major and minor version numbers of the DSP.

Known DSP version numbers and copyright strings

Card Major Minor DSP copyright

Sound Blaster 1.0

1

?

(none)

Sound Blaster 1.5

1

5

(none)

Sound Blaster 2.0

2

1

(none)

Sound Blaster 2.0

2

2

(none)

Sound Blaster Pro

3

0

(none)

Sound Blaster Pro 2

3

1

(none)

Sound Blaster Pro 2

3

2

(none)

Sound Blaster 16

4

4

COPYRIGHT © CREATIVE TECHNOLOGY LTD, 1992.

Sound Blaster 16

4

5

COPYRIGHT © CREATIVE TECHNOLOGY LTD, 1992.

Sound Blaster 16 SCSI-2

4

11

COPYRIGHT © CREATIVE TECHNOLOGY LTD, 1992.

Sound Blaster AWE32

4

12

COPYRIGHT © CREATIVE TECHNOLOGY LTD, 1992.

Sound Blaster ViBRA16C

4

13

COPYRIGHT © CREATIVE TECHNOLOGY LTD, 1992.

Sound Blaster ViBRA16XV

4

16

COPYRIGHT © CREATIVE TECHNOLOGY LTD, 1992.

Sound Blaster AWE64

4

16

COPYRIGHT © CREATIVE TECHNOLOGY LTD, 1992.

Sound Blaster AWE64 Gold

4

16

COPYRIGHT © CREATIVE TECHNOLOGY LTD, 1992.

Reveal SC400 (Gallant SC-6000)

3

5

SC-6000

VIA EPIA motherboard emulation

3

2

(none)

Yamaha OPL3-SA2

3

1

(none)

ESS 688

3

1

(none)

ESS 1869

3

1

(none)

Gravis Ultrasound (SBOS TSR active)

2

1

(none, does not properly support command)

Gravis Ultrasound (MEGA-EM TSR)

1

3

(NOT SUPPORTED, DO NOT USE, TSR WILL HARD-CRASH SYSTEM)

Gravis Ultrasound (MEGA-EM TSR, EMUSET -X2)

2

1

(NOT SUPPORTED, DO NOT USE, TSR WILL HARD-CRASH SYSTEM)

Windows XP NTVDM.EXE

2

1

(none)

Changeable DSP versions

Some Sound Blaster clone support changing the DSP version at runtime.

Reveal SC400

DSP command 0x6E, followed by two bytes (major) and (minor), can be used to change the DSP version reported by the card. The SBPRO.EXE utility included with their DOS and Windows 3.1 drivers does exactly this.

Yamaha OPL3-SA2

The OPL3 control port allows selecting between DSP version 2.x and 3.x.

ESS AudioDrive

Though not documented by ESS, there exists a register somewhere that can switch the reported DSP version between 2.x and 3.x, discovered by freak accident once.

wrong or incorrect version numbers

Card Major Minor Problem

Gravis Ultrasound

0xAA

0xAA

SBOS was used to emulate Sound Blaster, then unloaded. After unloading, emulation doesn’t work and 0xAA is always returned