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difference between ISA and Local Buss

By harvardd ·
How does a Local Buss Differ from a ISA or EISA Buss?

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difference between ISA and Local Buss

by Curacao_Dejavu In reply to difference between ISA ...

VESA Local Bus

VESA Local Bus (sometimes called the VESA VL bus) is a standard interface between your computer and its expansion slot that provides faster data flow between the devices controlled by the expansion cards and your computer's microprocessor. A "local bus" is a physical path on which data flows at almost the speed of the microprocessor, increasing total system performance. VESA Local Bus is particularly effective in systems with advanced video cards and supports 32-bit data flow at 50 MHz. A VESA Local Bus is implemented by adding a supplemental slot and card that aligns with and augments an Industry Standard Architecture expansion card. (ISA is the most common expansion slot in today's computers.)

ISA

ISA (Industry Standard Architecture) is a standard bus (computer interconnection) architecture that is associated with the IBM AT motherboard. It allows 16 bits at a time to flow between the motherboard circuitry and an expansion slot card and its associated device(s).

EISA

EISA is a standard bus (computer interconnection) architecture that extends the ISA standard to a 32-bit interface. It was developed in part as an open alternative to the proprietary Micro Channel Architecture (MCA) that IBM introduced in its PS/2 computers.
EISA data transfer can reach a peak of 33 megabytes per second


whatis.com

Leopold

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difference between ISA and Local Buss

by harvardd In reply to difference between ISA ...

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difference between ISA and Local Buss

by dmiles In reply to difference between ISA ...

An expansion bus architecture is the same as expansion slot type
1)ISA-It provides a 16-bit data bus.ISA bus is characterized by adding an additional short slot on the 8-bit bus to create the 16-bit connector
2)EISA-It is a 32-bit data bus,uses software setup has more I/O addresses.EISA uses only a 8 MHz bus clock to be backward compatible.
3)Local Bus was used first on 486 systems and grew out of the need for data bus to run the same clock speed as the CPU

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difference between ISA and Local Buss

by harvardd In reply to difference between ISA ...

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difference between ISA and Local Buss

by @lberto In reply to difference between ISA ...

ISA:
ISA (Industry Standard Architecture) is a standard bus (computer interconnection) architecture that is associated with the IBM AT motherboard. It allows 16 bits at a time to flow between the motherboard circuitry and an expansion slot card andits associated device(s).

EISA:
EISA is a standard bus (computer interconnection) architecture that extends the ISA standard to a 32-bit interface. It was developed in part as an open alternative to the proprietary Micro Channel Architecture (MCA) that IBM introduced in its PS/2 computers.
EISA data transfer can reach a peak of 33 megabytes per second.

VESA:
VESA Local Bus (sometimes called the VESA VL bus) is a standard interface between your computer and its expansion slot that provides faster data flow between the devices controlled by the expansion cards and your computer's microprocessor. A "local bus" is a physical path on which data flows at almost the speed of the microprocessor, increasing total system performance. VESALocal Bus is particularly effective in systems with advanced video cards and supports 32-bit data flow at 50 MHz. A VESA Local Bus is implemented by adding a supplemental slot and card that aligns with and augments an Industry Standard Architecture expansion card. (ISA is the most common expansion slot in today's computers.)
Good luck,

@lberto

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difference between ISA and Local Buss

by harvardd In reply to difference between ISA ...

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difference between ISA and Local Buss

by csmith In reply to difference between ISA ...

The important difference between VESA Local Bus and ISA/EISA is that there is no buffer chip between the CPU and the card.
If you check a 486 VESA motherboard, you will find that some of the pins in the CPU socket are directly connected to the VESAslot connector.
This means a poorly designed card can overload the CPU.
I have encountered this problem.
Regards, Chris

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difference between ISA and Local Buss

by harvardd In reply to difference between ISA ...

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difference between ISA and Local Buss

by harvardd In reply to difference between ISA ...

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