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This Micro Channel to SCSI Host Adapter supports busmastering, and has an on-board bios to allow booting from a SCSI hard disk.
Small Image of AHA-1640
DownloadsDocumentationTechnical Specifications

Note: Only drivers that are not included or embedded within a supported operating system are listed below. To see a complete list of supported operating systems see the Product Specifications

Select your operating system or software below

Bios Updates and Other Downloadable Files

Bios Updates and Other Downloads




Microsoft Windows 95

Novell NetWare

Novell NetWare Downloads

Installing Drivers or Software
cd install netware 401 (html 68 kb)
cdrom in dos (html 68 kb)
unix driver disk conversion (html 69 kb)
loading adaptec dsk drivers (html 71 kb)
netware 3.12 cd install (html 68 kb)
installation tips for os/2 1.3 (html 69 kb)
sbackup tips for netware (html 67 kb)
sco unix driver names (html 68 kb)
Product Documentation
Install Guide for the AHA-1640 (PDF 110 KB)
Use Your Product
scsi terms explained (html 77 kb)
sense codes described (html 96 kb)
Number of devices
Supports up to 7 SCSI devices

Bus System Interface Type

16 bit, Bus Master Direct Memory Access
External Connectors
50 pin high density
Internal Connectors
50 pin shrouded
Data Transfer Rate
Up to 8 MBytes/sec
Package Contents
AHA-1640Adaptec EZ-SCSI (for DOS/Windows)ASW-1440 (Novell NetWare drivers)ASW-1220/1420 (IBM OS/2 v1.3 drivers)Internal SCSI ribbon cableDocumentation

Device Protocol


Electrical Terminations

Passive Termination

Hard Disk Capacity

Supports SCSI hard disk drives under DOS of up to:
1 GByte with on board BIOS,
and up to 8 GByte in capacity as secondary device using Adaptec EZ-SCSI