what ISA expantion slots came in two flavers
ISA
ISA
PCI, AGP, and ISA are types of expansion bus slots. These slots allow you to attach internal peripherals such as video cards, hard drive controllers, modems, tuner cards, and other things.
According to my A+ book a CPU in a AT mobo will sit towards the front of the board and in front of the ISA slots. On an ATX mobo it will sit towards the back near the fan and to the side of the ISA slots.
PCI express
They were known as an "expansion bus". So-called because the expansion cards with edge connectors, plugged directy into the bus board. (Today we would call it a motherboard) There were 3 bus standards: Industry Standard Architecture (ISA) Micro Channel Architecture (MCA) Extended Industry Standard (EISA) I hope that helps. Michael Sharp, CEO hostyouridea.com
Yes Micro Channel Architecture (MCA) expansion bus slots, were an architecture class of expansion slot as you call it. But their were two other classes of expansion bus in use, namely: ISA and EISA. Please refer to my answer at: http://wiki.answers.com/Q/What_were_expansion_slots_called_during_the_early_PC's Michael Sharp, CEO Hostyouridea.com
With the exception of some various expensive industrial motherboards, you will not find any ISA slots on a motherboard. In order to be certified for Windows 2000 and later, Microsoft required that manufacturers remove ISA slots from their boards.
An ISA slot may be used to add a video card, a network card, or an extra serial port. By the end of the twentieth century, ISA ports were beginning to be replaced by faster PCI and AGP slots. Now, most computers only support PCI and AGP expansion cards.
If you look at your manual, you will see there are no ISA slots on this board. 2- pci-e 16x 2- pci-e x1 1- pci
Extension cards. (What else did you think of, decoration?)
ISA bus was a standard used for years. It was first 8-bit, being the standard expansion slot for most 8086/8088 motherboards, but later extended to 16-bit, which was the standard for 286, 386, and 486 motherboards. Most standard PC's had ISA slots through the late 1990's. They began to be phased out in the early 2000's, and are now obsolete. VESA Local bus was an extension of the standard 16-bit ISA bus, and gave a 32-bit expansion slot. These were seen in late 486 and early Pentium motherboards, which would often have two or three VESA Local Bus slots in addition to 16-bit ISA slots. They were short lived, quickly replaced by PCI slots. PCI was introduced in the mid 1990's, and are still common today. Some late 486 motherboards had two or three PCI slots in addition to 16-bit ISA slots, and they became standard with Pentium systems (most Pentium motherboards, Pentium II motherboards, and some Pentium III motherboards still had some ISA slots in addition to the PCI slots). MCA was bus developed by IBM and used in their PS/2 systems. It is to buses what Beta is to the VCR: A good technology, but made obsolete because it's developers made it too expensive for other manufacturers to license. MCA offered a 32-bit bus before VESA Local Bus or PCI were available.