Each IDE connector on the board supports two channels per. (Two drives) The combination of drives can vary. For instance, hard drive-cdrom, hard drive-hard drive, cdrom-cdrom, ect....ect.
Short answer: Four A much more precise answer: The IDE standard allows for two devices to share a single IDE channel. The most common configuration is for there to be two IDE channels on the motherboard, allowing for a total of four devices. It is possible however, to add more IDE channels, usually in the form of PCI add-on IDE controller cards and have literally dozens of IDE devices in a single computer system.
A typical modern motherboard has 1 IDE channel, which can support 2 devices. IDE has been replaced by Serial ATA (SATA), so modern boards have 2 to 8 SATA ports. Older motherboards may have 2 to 6 IDE channels, which could support 4-12 IDE devices.
up to two
The system will be able to support 4 EDIE devices, 2 devices per cable.
Wide SCSI bus can support up to 16 devices using channels 0-15.
If im reading the question right the answer is 4 and only four as that is how many devices you can have on two connection (or two on each cable master and slave)
Four, two per connection. Each cable has a master and a slave, so pay attention to jumper settings when connecting the devices.
Four. A master device and a slave device on each PATA chain.
Typically, up to 7. In an emergency situation, more could be accomodated, but not for long, and not very comfortably.
90 and its the ram not the whole motherboard
many of them.
One or zero, depending on the specific motherboard model.