18-668: LCIII or variation , may refer to: Macintosh LC III , 1990s Apple personal computer Late Cypriot III (LCIII), a period of the Mediterranean Bronze Age LC III pelvic fracture in the Young-Burgess classification Local Council III (LCIII), a type of local administration in Uganda; see Local Council (Uganda) Creative Playthings LCIII, an educational toy modular electronics experiment kit, based on
36-470: Is a 32-bit microprocessor in the Motorola 68000 series , released in 1990. It is the successor to the 68030 and is followed by the 68060 , skipping the 68050. In keeping with general Motorola naming, the 68040 is often referred to as simply the '040 (pronounced oh-four-oh or oh-forty ). The 68040 was the first 680x0 family member with an on-chip Floating-Point Unit (FPU). It thus included all of
54-563: Is different from Wikidata All article disambiguation pages All disambiguation pages Macintosh LC III The Macintosh LC III is a personal computer designed, manufactured, and sold by Apple Computer from February 1993 to February 1994. It replaced the commercially successful Macintosh LC II in Apple's lineup of mid-class computers, and was significantly faster, with MacWorld Magazine benchmarks showing 2x performance in all major categories - CPU, disk, video and maths. It
72-502: Is thus significantly faster than the 68030. Some mask revisions of the 68LC040 contained a bug that prevents the chip from operating correctly when a software FPU emulator is used. According to Motorola's errata, any chip with a mask set 2E71M or later does not contain the bug. This new mask was introduced in mid-1995 and converted the 68LC040 chip to MC status. The buggy revisions are typically found in 68LC040-based Apple Macintosh computers. Chips with mask set 2E23G (as used in
90-616: The NeXT computer. The 68040 processor is used in the flight management computers (FMC) aboard many Boeing 737 aircraft, including all Next Generation and MAX models. The 68040 ran into the transistor budget limit early in design. While the MMU did not take many transistors—indeed, having it on the same die as the CPU actually saved on transistors—the FPU certainly did. Motorola's 68882 external FPU
108-536: The Raytheon Lectron Praga LC-III (aircraft), see List of aircraft (Pi–Pz) See also [ edit ] [REDACTED] Search for "lciii" or "lc-iii" on Misplaced Pages. LC3 (disambiguation) LCII (disambiguation) LCI (disambiguation) All pages with titles containing lc iii All pages with titles beginning with LCIII All pages with titles containing LCIII Topics referred to by
126-541: The (short-lived) Macintosh Centris line also used the 68040, while the cheaper Quadra, Centris and Macintosh Performa used the 68LC040 . The 68040 was also used in other personal computers , such as the Amiga 4000 and Amiga 4000T , as well as a number of workstations , Alpha Microsystems servers, the HP 9000 /400 series, NCR Corporation 's TOWER 32/750, 32/825 and 32/850, Apollo Computer 's DN5500 , and later versions of
144-400: The 68020 and 68030, the chip's complexity and power requirements came from a large die and large caches. This affected the scaling of the processor and it was never able to run with a clock rate exceeding 40 MHz. A 50 MHz variant was planned, but canceled. Overclocking enthusiasts reported success reaching 50 MHz using a 100 MHz oscillator instead of an 80 MHz part and
162-479: The FPU and MMU. Motorola had intended the EC variant for embedded use, but embedded processors during the 68040's time did not need the power of the 68040, so EC variants of the 68020 and 68030 continued to be common in designs. Motorola produced several speed grades. The 16 MHz and 20 MHz parts were never qualified (XC designation) and used as prototyping samples. 25 MHz and 33 MHz grades featured across
180-406: The functionality that previously required external chips, namely the FPU and Memory Management Unit (MMU), which was added in the 68030. It also had split instruction and data caches of 4 kilobytes each. It was fully pipelined , with six stages. Versions of the 68040 were created for specific market segments, including the 68LC040 , which removed the FPU, and the 68EC040 , which removed both
198-410: The popular fractal generating software of the time and little else. The Motorola floating point support package (FPSP) emulated these instructions in software under interrupt. As this was an exception handler, heavy use of the transcendental functions caused severe performance penalties. Heat was always a problem throughout the 68040's life. While it delivered over four times the per-clock performance of
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#1732765233828216-407: The same term [REDACTED] This disambiguation page lists articles associated with the title LCIII . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=LCIII&oldid=1252548879 " Category : Disambiguation pages Hidden categories: Short description
234-718: The same year, with a 33 MHz CPU. Three Performa variants of this model were released: the 460, 466 and 467. These faster models replaced the LC III and Performa 450, with sales of the original models continuing until the end of 1993 as dealers depleted their stocks. New sales of the LC III+ ended in early 1994 as Apple neared the completion of the transition away from 68030 processors. The 68LC040 -based LC 475 and Performa 475 were their replacements. Introduced February 10, 1993: Introduced October 18, 1993: Motorola 68040#68LC040 The Motorola 68040 (" sixty-eight-oh-forty ")
252-649: The then novel technique of adding oversized heat sinks with fans. The 68040 offered the same features as the Intel 80486 , but on a clock-for-clock basis could significantly outperform the Intel chip in integer and floating point instructions. The 68EC040 is a version of the Motorola 68040 microprocessor, intended for embedded controllers (EC). It differs from the 68040 in that it has neither an FPU nor an MMU. This makes it less expensive and it draws less power. The 68EC040
270-541: The whole line, but until around 2000 the 40 MHz grade was only for the "full" 68040. A planned 50 MHz grade was canceled after it exceeded the thermal design envelope . In Apple Macintosh computers, the 68040 was introduced in the Macintosh Quadra , which was named for the chip. The fastest 68040 processor was clocked at 40 MHz and it was used only in the Quadra 840AV. The more expensive models in
288-631: Was also significantly less expensive; the LC III with an 80 MB hard disk was priced at US$ 1,349 at introduction, $ 700 less than the LC II. The LC III was sold primarily (but not exclusively) to educational institutions, and a corresponding Performa variant called the Performa 450 was sold to the consumer market. A speed-bumped version, called the Macintosh LC III+ was released in October of
306-410: Was known as a very high performance unit and Motorola did not wish to risk integrators using the "LC" version with a 68882 instead of the more profitable full "RC" unit. (For information on Motorola's multiprocessing model with the 680x0 series, see Motorola 68020 .) The FPU in the 68040 was incapable of IEEE transcendental functions , which had been supported by both the 68881 and 68882 and were used by
324-478: Was used in Cisco switch Supervisor Engine I that is the heart of models 2900, 2948G, 2980G, 4000, 4500, 5000, 5500, 6000, 6500 and 7600. The 68LC040 is a low cost version of the Motorola 68040 microprocessor with no FPU. This makes it less expensive and it draws less power. Although the CPU now fits into a feature chart more like the Motorola 68030, it continues to include the 68040's caches and pipeline and
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