NKK ANNOUNCES NR4600 MICROPROCESSOR AND PCI CHIPSET FOR HIGH-SPEED, LOW
POWER CONSUMPTION AND LOW-COST RISC PERSONAL COMPUTER SYSTEM

New York, N.Y., June 27, 1994 -- NKK Corporation (NKK), a MIPS RISC
architecture licensee, today introduced a 3.3V 100 MHz NR4600 (ORION)
microprocessor and a PCI chipset for low-cost RISC based personal computer
systems running the Windows NT operating system. The NR4600 microprocessor
is a high-performance, low-cost, low power consumption 64-bit
implementation of the MIPS 64-bit architecture co-developed with
Integrated Device Technology Inc. and Toshiba Corporation.

The PCI chipset, the first of its kind to support a MIPS RISC
microprocessor, features a two-chip solution: a ND4600-BRG (code-named
Libra) chip that bridges the NR4600's 64-bit local bus to the PCI bus and
controls the secondary caches, and a ND4600-MEC (code-named Taurus) to
control the DRAMs. The chipset operates at 3.3V and supports the 3.3V
NR4600 microprocessor, thus creating a high-speed, low power consumption
system. It has direct interfaces to 5V operated devices, making it
possible to provide system configuration with widely available peripherals
and memories. The ND4600-BRG conforms to PCI bus specification Ver. 2.0
and supports up to 33MHz bus operation.

NKK is also developing a higher-performance 150MHz (50MHz, 75MHz external
bus clock) version and a 150 MHz (50MHz, 75MHz external bus clock)
enhanced floating point version for future introduction along its
microprocessor roadmap.

The 3.3V, 100MHz NR4600 microprocessor is available in a 208-pin Metal QFP,
208-pin PQFP with a heat spreader and 179-pin PGA package. The ND4600-BRG
and ND4600-MEC are both available in industry-standard 0.5mm pitch 240-pin
PQFPs. Samples will be available in the third quarter of '94 with
production devices available in the first quarter of '95.

The NR4600 and ND4600-BRG/ND4600-MEC chipset performance can be
demonstrated on the personal computer reference platform Aquarius running
the Windows NT operating system with a 256 KByte (Max 1MByte) L2 cache,
16MByte (Max 256MByte) main memory, 3PCI bus slots, 4 ISA bus slots
configuration. The system BIOS is provided by American Megatrends Inc. The
design kit for Aquarius is available from NKK.

NKK Corporation focuses on high-speed and low voltage CMOS devices. NKK's
device line up includes microprocessors for PCs and embedded controls,
high-speed SRAMs, high-speed Mask ROMs and Flash Memories. NKK is
headquartered in Tokyo, Japan.

NKK America Inc.
Santa Clara Office
2350 Mission College Blvd., Suite 380
Santa Clara, CA 95054, U.S.A.
408-982-8277,  Fax 408-982-9809

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