Dual SKD-4000

Dual SKD-4000

The Dual SKD-4000 is a 486-based generic/ODM laptop that was released around June 1993. The SKD-4000 has a very modular design. The top right of the system has an expansion bay that could fit several modules, a trackball being the most common.

This laptop was sold under many names, but Dual Technology Corporation is the original manufacturer.

There were at least two major hardware revisions of this laptop. The most notable change of the second revision design was the addition of an Analog Devices SoundPort sound system, including audio jacks and an external CD-ROM connector. To my knowledge, this sound system is not SoundBlaster compatible (WSS only). The second revision also adds a very strange TrackPoint implimentation, with the pointing stick being located in the middle of the right side of the spacebar, inside the key itself. Overall, a very strange laptop.

Below is a list of brands I currently know sold it:


Specifications

Spec Details
CPU CPU Type: Socket 486
- Intel 486DX @33MHz
- Intel 486DX2 @66MHz
Chipset ACC Micro 2046 or 2066 (depends on revision)
RAM Type: Standard (72-pin?) RAM Slot
Standard: 4MB
Maximum: 20MB
Hard Disk 2.5" IDE
Uses proprietary adapter?: Yes
Standard: N/A
Display Options - 9.5" Passive Matrix Grayscale @640x480
- 9.5" Passive Matrix Color @640x480
- 9.5" Active Matrix Color @640x480
Graphics Chipset Chips & Technologies 65520
VRAM: Unknown
Audio Analog Devices AD1848 SoundPort (Some revisions)
Main Battery Unknown
CMOS Battery Soldered 2330 Lithium
Power Supply Kycon KPPX-4P Connector
- Alitech AD-850-12
Disk Drives 3.5" 1.44MB Floppy Drive (Modular)
PC Cards Expansion bay holds one of the following modules:
- Trackball Module
- PCMCIA Module
- SCSI Module
- Modem Module
- LAN Module (Ethernet?)
Networking Modem (Optional)
Other I/O - 1x Parallel
- 1x Serial
- 1x VGA Out
- 1x PS/2
- 1x Dock Connector
- 1x External CD-ROM Connector (some revisions)
- 1x Mic In (some revisions)
- 1x Line In (some revisions)
- 1x Line Out (some revisions)
BIOS AMI
Pointing Device - Trackball (Optional)
- TrackPoint (Optional)


Page last updated (MM/DD/YYYY): 01/08/2025
Update Reason: page created

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