Before revision: ChipProtocolSiI/CMD 640MDMA 1SiI/CMD 643MDMA 2SiI/CMD 646UDMA 2SiI/CMD 648UDMA 4SiI/CMD 649UDMA 5SiI0680UDMA 6 Hardware bug The original CMD640 has data corruption bugs, some of which remained in CMD646.- linux/drivers/ide/pci/cmd640.c Version 1.02 Sep 01, 1996 The data corruption bug is similar to the bug affecting the contemporaneous PC Tech (a subsidiaryRZ1000 FAQ of Zeos) RZ1000 chipset.
After revision: ChipProtocolSiI/CMD 640MDMA 1SiI/CMD 643MDMA 2SiI/CMD 646UDMA 2SiI/CMD 648UDMA 4SiI/CMD 649UDMA 5SiI0680UDMA 6 Hardware bug The original CMD640 has data corruption bugs, some of which remained in CMD646.- linux/drivers/ide/pci/cmd640.c Version 1.02 Sep 01, 1996 The data corruption bug is similar to the bug affecting the contemporaneous PC Tech (a subsidiary of Zeos) RZ1000 chipset.