CMD PCI0640 (MDMA 1 IDE controller)
Logs
dateType
IDE ctrl.
datePCI Vendor ID
1095 102F
datePCI Device ID
0640
actActions
See all boards with this chip See all cards with this chip
tag Also known as
  • CMD PCI0640B (MDMA 1 IDE controller)
  • Toshiba TC160G16 1041 (Programmed Gate Array)
doc 2 chip documents available
Release date
File
Logs
Release date
File
Logs
Release date
1994-10-10
File
Logs
notes Notes

The original CMD640 has data corruption bugs, some of which remained in CMD646. The data corruption bug is similar to the bug affecting the contemporaneous PC Tech (a subsidiary of Zeos) RZ1000 chipset. Both chipsets were used on a number of motherboards, including those from Intel.

Мodern operating systems have a workaround for this bug by prohibiting aggressive acceleration mode and losing about 10% of the performance.

drv 1 driver available
Name
Version
OS support
Arch
Size
Filename
Name
Version
v2.09
OS support
MS-DOS NetWare Server 3 NetWare Server 4 OS/2 2.x SCO Unix - OpenServer Windows NT 3.1 Windows NT 3.5x
Arch
x86
Size
691.2KB
Filename
wrench Known issues
  • Faulty IDE Controller

The IDE controller(s) is known to be faulty, which may cause problems with IDE devices such as data corruption or lockups.

Last updated 2026-01-09T13:42:13Z
image1 Image 1 of 3 (lukas12p)
image2 Image 2 of 3 (spacesaver1985)
image3 Image 3 of 3 (Eric Voirin (oerg866))

Disclaimer

The info found in this page might not be entirely correct. Check out this guide to learn how you can improve it.