SBus is a computer bus system that was used in most SPARC-based computers ( including all SPARCstations ) from Sun Microsystems and others during the 1990s.

In 1997 Sun started to migrate away from SBus to the Peripheral Component Interconnect ( PCI ) bus, and today SBus is no longer used.

SBus is in many ways a " clean " design.

The ZX is a 24-bit card with hardware-accelerated 3D operations, offering high speeds and resolutions, however, it's poorly supported, takes up two SBus slots, and runs extremely hot.

When the 64-bit UltraSPARC was introduced, SBus was modified to use clock doubling and transfer two 32-bit data words per cycle to produce a 200 MB / s 64-bit bus.

GSC was a general 32-bit I / O bus, similar to NuBus or Sun's SBus, although it was also used as a processor bus with the PA-7100LC and PA-7300LC processors.

SBus was originally announced as both a system bus and a peripheral interconnect that allowed input and output devices relatively low latency access to memory.

The SBus served as an input / output bus for the rest of its lifetime.

The original SPARCstation 1 design included an expansion bus technology, SBus, expressly designed for the form factor ; expansion cards were small, especially in comparison to other expansion cards in use at the time such as VMEbus, and were mounted horizontally instead of vertically.

The motherboard offered three SBus slots and had built-in AUI ethernet, 8 kHz audio, and a 5 MB / s SCSI-1 bus.

Additional Ethernet interfaces can be added with an SBus card.

Alternatively, SBus cards can be used, including the ZX ( Leo ), Turbo GX ( CG6 ) and others.

Additional SBus network cards can also be added.

When Sun moved to open the SPARC definition in the early 1990s, SBus was likewise standardized and became IEEE-1496.

The industry's first 3rd party SBus cards were announced in 1989 by Antares Microsystems.

At the peak of the market over 250 manufacturers were listed in the SBus Product Directory, which was renamed to the SPARC Product Directory in 1996.

This variant of the SBus architecture used the same 96-pin connector as the older one.

SBus cards had a very compact form factor for the time.

Bechtolsheim specified that the motherboard would be the size of a sheet of paper and the SBus expansion cards would be the size of index cards, resulting in an extremely compact footprint.

Sun Microsystems developed the SBus in 1989 to support smaller expansion cards.

Contrast this with SBus, used in the same machines to connect add-on cards to the motherboard.

Sun's dual 50 MHz SuperSPARC modules ( the only dual MBus modules supported by Sun for this system ) were double-width, physically occupying one SBus slot per module in addition to an MBus slot.

Although offered with the same 110 MHz microSPARC-II processor as the SPARCstation 5, it only has one SBus expansion slot instead of three, a single 1. 05 GB hard drive, and maximum memory capacity of 160 MB instead of 256 MB.

Other options include the CG6 ( GX, GX +, Turbo GX and TGX +) 8-bit SBus framebuffers, capable of up to 1280 × 1024 resolution in 8-bit color, and the ZX ( Leo ).

Its faster cousin, the Turbo ZX, requires a fan card, taking up all four SBus slots.

For the beatnik, like the hipster, is in opposition to a society that is based on the repression of the sex instinct.

The central concern of Erich Auerbach's impressive volume called Mimesis is to describe the shift from a classic theory of imitation ( based upon a recognition of levels of truth ) to a Christian theory of imitation in which the levels are dissolved.

The assumptions upon which the example shown in Figure 3 is based are: ( A ) One man can direct about six subordinates if the subordinates are chosen carefully so that they do not need too much personal coaching, indoctrinating, etc..

`` History has this in common with every other science: that the historian is not allowed to claim any single piece of knowledge, except where he can justify his claim by exhibiting to himself in the first place, and secondly to any one else who is both able and willing to follow his demonstration, the grounds upon which it is based.

Like ours, the economy of the space merchants must constantly expand in order to survive, and, like ours, it is based on the principle of `` ever increasing everybody's work and profits in the circle of consumption ''.

The American Medical Association is once again grinding out its tear-soaked propaganda based upon the high cost of the Veterans Administration medical program to the American taxpayer.

-- Your July 26 editorial regarding the position of Attorney General Robert F. Kennedy on prospective tax relief for DuPont stockholders is based on an erroneous statement of fact.

As is the case with the allotment provisions for support of vocational rehabilitation services, the matching requirements are also based on a statutory formula.

The shelter illustrated in figure 12 is based on such a room built in a new home in the Washington, D.C. area in the Spring of 1959.

The rules and policies to be applied in this process of course must be based on objectives which represent what is to be desired if radio service is to be of maximum use to the Nation.

This program is based on the policy of designing and building efficient machines which will help produce better textile values -- fabrics whose cost in relation to quality, fashion and utility provide the consumer with better textile products for the money.

But because science is based on mathematics doesn't mean that a hot rodder must necessarily be a mathematician.

and perhaps of even greater significance -- his music is strong 20th-Century evidence of the effectiveness of Evolution, based on a broad Traditionalism for the creative art of music.

Promotion is too often based on longevity and time in salary grade instead of merit.

The experimental arrangement as described below is based on the geometry of free burning arcs.

With detectors sensitive to three mass intervals and based on a few counts, the second and third Russian space probes indicate that the flux of the smallest particles detected is less than that of larger ones.

Oliver's 37-1/2 feet is partly based on this report and can be accepted as probable.

the former figure is based on a somewhat unusual birth of four by a Central American female ( see chapter on Laying, Brooding, Hatching, and Birth ), the latter on a `` normal '' newly born individual.

Although the standard deviation values on which spread of the lines is based are relatively larger for those centers which begin to ossify early ( Table 1 ), there are considerable differences in this value between centers having the closely timed Onsets.

The following summary, based on Figures 5 and 6, is an example of one way of interpreting the 42 figures constructed from onset ages and completion ages of individual children with respect to the appropriate mean age for each growth center.

These differences in turn result from the fact that my Yokuts vocabularies were built up of terms selected mainly to insure unambiguity of English meaning between illiterate informants and myself, within a compact and uniform territorial area, but that Hoijer's vocabulary is based on Swadesh's second glottochronological list which aims at eliminating all items which might be culturally or geographically determined.