NEW Computers with ISA slot

WE SELL New Computers With EISA Slot / EISA Bus. NIXSYS offers NEW Computers with ISA slot. 

These systems are ideal for companies looking to fit legacy technology into a powerful P4 computer or server. 

NEW Computers with ISA slot

These NEW Computers with ISA slot, are an invaluable tool for companies that have the need to update their old computer but still require ISA slot adapters.

NIXSYS standard product line of computers with ISA slot are available in a tower chassis and also 3U/4U rackmount chassis, other formats are available upon request. These configurations allow fitting up to three full size ISA adapters. Our NEW Computers with ISA slot are compatible with a variety of different new and old operating systems such as MS XP Professional, MS Windows 2000, MW Windows 98/95, NT, DOS and O/S2 among others.

Many people resist investing in NEW Computers with ISA slot for their companies because they think that the system are not available and the ones that are available are too expensive. But here at NIXSYS we use up-to-date industry standard components to custom-built NEW Computers with ISA slot at very low price.

ISA slot

The ISA bus was developed by a team led by Mark Dean at IBM as part of the IBM PC project in 1981. It originated as an 8-bit system. The newer 16-bit standard, the IBM AT bus, was introduced in 1984. In 1988, the Gang of Nine IBM PC compatible manufacturers put forth the 32-bit EISAstandard and in the process retroactively renamed the AT bus to "ISA" to avoid infringing IBM's trademark on its PC/AT computer. IBM designed the 8-bit version as a buffered interface to the external bus of the Intel 8088 (16/8 bit) CPU used in the original IBM PC and PC/XT, and the 16-bit version as an upgrade for the external bus of the Intel 80286 CPU used in the IBM AT. Therefore, the ISA bus was synchronous with the CPU clock, until sophisticated buffering methods were developed and implemented by chipsets to interface ISA to much faster CPUs.

Designed to connect peripheral cards to the motherboard, ISA allows for bus mastering although only the first 16 MB of main memory are available for direct access. The 8-bit bus ran at 4.77 MHz (the clock speed of the IBM PC and IBM PC/XT's 8088 CPU), while the 16-bit bus operated at 6 or 8 MHz (because the 80286 CPUs in IBM PC/AT computers ran at 6 MHz in early models and 8 MHz in later models.) IBM RT/PC also used the 16-bit bus. It was also available on some non-IBM compatible machines such as Motorola 68k-based Apollo (68020) and Amiga 3000 (68030) workstations, the short-lived AT&T Hobbit and later PowerPC based BeBox.

From top to bottom: XT 8-bit, ISA 16-bit,EISA
ISA 8-bit card
ISA 16-bit, Madge 4/16 Mbit/s TokenRing NIC.
ISA 16-bit, Ethernet 10Base-5/2 NIC.

In 1987, IBM moved to replace the AT bus with their proprietary Micro Channel Architecture (MCA) in an effort to regain control of the PC architecture and the PC market. (Note the relationship between the IBM term "I/O Channel" for the AT-bus and the name "Micro Channel" for IBM's intended replacement.) MCA had many features that would later appear in PCI, the successor of ISA, but MCA was a closed standard, unlike ISA (PC-bus and AT-bus) for which IBM had released full specifications and even circuit schematics. The system was far more advanced than the AT bus, and computer manufacturers responded with the Extended Industry Standard Architecture (EISA) and later, the VESA Local Bus (VLB). In fact, VLB used some electronic parts originally intended for MCA because component manufacturers already were equipped to manufacture them. Both EISA and VLB were backwards-compatible expansions of the AT (ISA) bus.

Users of ISA-based machines had to know special information about the hardware they were adding to the system. While a handful of devices were essentially "plug-n-play", this was rare. Users frequently had to configure several parameters when adding a new device, such as the IRQ line, I/O address, or DMA channel. MCA had done away with this complication, and PCI actually incorporated many of the ideas first explored with MCA (though it was more directly descended from EISA).

This trouble with configuration eventually led to the creation of ISA<strong> PnP</strong>, a plug-n-play system that used a combination of modifications to hardware, the system BIOS, and operating system software to automatically manage resource allocations. This required a system with an advanced programmable interrupt controller (APIC) replacing the Intel 8259 which the PC was born with. In reality, ISA PnP can be troublesome, and did not become well-supported until the architecture was in its final days since the APIC chip was a serendipitous addition to ISA by the PCI standard, which required an APIC.

PCI slots were the first physically incompatible expansion ports to directly squeeze ISA off the motherboard. At first, motherboards were largely ISA, including a few PCI slots. By the mid-1990s, the two slot types were roughly balanced, and ISA slots soon were in the minority of consumer systems. Microsoft's PC 97 specification recommended that ISA slots be removed entirely, though the system architecture still required ISA to be present in some vestigial way internally to handle the floppy drive,serial ports, etc., which was why the software compatible LPC bus was created. ISA slots remained for a few more years, and towards the turn of the century it was common to see systems with an Accelerated Graphics Port (AGP) sitting near thecentral processing unit, an array of PCI slots, and one or two ISA slots near the end. In late 2008, even floppy disk drives and serial ports were disappearing, and the extinction of vestigial ISA (by then the LPC bus) from chipsets was on the horizon.

It is also notable that PCI slots are "rotated" compared to their ISA counterparts—PCI cards were essentially inserted "upside-down," allowing ISA and PCI connectors to squeeze together on the motherboard. Only one of the two connectors can be used in each slot at a time, but this allowed for greater flexibility.

NEW Computers with ISA slot

At NIXSYS, we work with major corporations, universities, small businesses and the U.S. government to develop custom designed NEW Computers with ISA slot. We make sure you get the components you need, and we provide the processing power necessary for your applications that required legacy technology.

One of our most popular NEW Computers with ISA slot is the tower NIX-TISA. Depending on your needs, you can use a Celeron or Pentium 4 processor for this server and you can use up 2GB of memory. Our computers with ISA slot also offer the Silencer Kit option that make these a very quite computers or virtually silent. Don't hesitate to Contact us with any of your questions.

ISA Motherboard Product Line

For additional information please contact us at or call us at (866) 464-9797.

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