CMD PCI0640 (MDMA 1 IDE controller)
Logs See all boards with this chip See all cards with this chip
dateType
IDE ctrl.
datePCI Vendor ID
1095 102F
datePCI Device ID
0640
tag Also known as
  • CMD PCI0640B (MDMA 1 IDE controller)
  • Toshiba TC160G16 1041 (Programmed Gate Array)
No additional family specs
doc 2 chip documents available
Release date
File
Logs
Release date
File
Logs
Release date
1994-10-10
File
Logs
drv No drivers available
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.

Last updated 2025-04-22T11:17:58Z
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