What are the improvements of the E.I.S.A bus over the I.S.A bus? excluding verbs rate.?
Industry Standard Architecture - I.S.A
Answer:
Lunte...
Since almost 1984, the standard bus for PC I/O functions has be named ISA (Industry Standard Architecture). It is still used surrounded by all PCs to keep going backwards compatibility. In that way modern PCs can adopt expansion cards of the old ISA type.
ISA be an improvement over the inspired IBM XT bus, which was lone 8 bit wide. IBM's trademark is AT bus. Usually, it is lately referred to as ISA bus.
ISA is 16 bit wide and runs at a maximum of 8 MHz. However, it requires 2-3 clock ticks to move 16 bits of background. The ISA bus works synchronous with the CPU. If the system bus is faster than 10 MHz, abundant expansion boards become flaky and the ISA clock frequency is reduced to a fraction of the system bus clock frequency.
The ISA bus has an academic transmission size of about 8 MBps. However, the actual speed does not exceed 1-2 MBps, and it soon become too slow.
However in the 1980s a constraint developed for buses more powerful than the ISA. IBM developed the MCA bus and Compaq and others responded with the EISA bus. None of those be particularly swift, and they never became specially successful outside the server market.
EISA be developed in 1988-89. It is designed by the "Gang of Nine:" the companies AST, Compaq, Epson, Hewlett-Packard, NEC, Olivetti, Tandy, Wyse and Zenith. It come in response to IBM's patented MCA bus.
EISA is built on the ISA bus; the connector have the same dimensions and out-of-date ISA cards fit into the slots. To keep this compatibility, the EISA bus works at maximum 8 MHz. Like ISA, the bus bus is synchronous next to the CPU at a clock frequency reduced to a fraction of the system bus clock frequency.
EISA is compatible with ISA surrounded by the sense that ISA adapters can be installed in EISA slots. The EISA adapters hold a second plane of connectors in the button of the slot.
However, EISA is much more intelligent than ISA. It have bus mastering, divided interrupts and self configuration. It is 32 bit wide, and beside it's compressed transfers and BURST modegives a highly enhanced performance.
But, similar to the MCA, it did not have great nouns. Yet the EISA bus is still used in some servers.
Hope this help
DM
MCP MCSA MCSE+S BIT
Ticket prices are lower.
higher bandwith and clock speed at a guess
EISA have a software-assisted bus line configuration available to it, but ISA does not; you own to mentally clear to deal beside ISA bus configuration problems.
And EISA is 32-bit, ISA is 16.
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