- ShaBLAMM! NiTro-VLB
The ShaBLAMM! NiTro-VLB was a computer system that used a MIPS R4600
microprocessor implemented on a VESA VLB peripheral card and designed to function when connected to a host computer system using anIntel i486 . The NiTro-VLB conformed to the ARC standard, and was produced and marketed byShaBLAMM! Computer as an "upgrade" card for acceleratingWindows NT .Characteristics
The NiTro-VLB is notable for various unique characteristics among personal computer accessories. For example, although the system was marketed as an "upgrade" for computers already using a 486 processor, the NiTro-VLB was in fact of an entirely different architecture (specifically, the MIPS
RISC architecture) from theIA32 -based 486. Further, as a "parasitic" or "symbiotic"coprocessor , the NiTro-VLB was designed to cooperate the host 486 processor from running, and used four megabytes of the host 486 motherboard's system memory as a DMA buffer (although the NiTro-VLB required its own separateDRAM main memory , in addition to any memory installed on the host 486 motherboard).This type of "parasite"/"host" upgrade card configuration, in which an entire motherboard and processor are implemented on an expansion card designed to connect to a host motherboard's expansion slot. However, such configurations are rare among computer systems designed to run
Microsoft Windows .pecifications and benchmarks
The NiTro-VLB's MIPS R4600 processor, running at 100 MHz, was rated at 73.8 SPECint92 and 63 SPECfp92 (which are similar figures to the first-generation
Pentium running at 66 MHz). Faster and costlier versions were designed to run at 133 MHz or 150 MHz.ales
Initially, the NiTro-VLB system was priced at $1,095 for a 100 MHz card with no main memory, $1,995 for a 100 MHz card with 16 MB of main memory and a copy of Windows NT, and $2,595 for a 150 MHz card.
ee also
*
Jazz (computer)
*MIPS Magnum
*DeskStation Tyne External links
* [http://www.byte.com/art/9407/sec4/art9.htm A BYTE magazine article detailing the ShaBlamm! Nitro-VLB]
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