Misplaced Pages

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82-764: Much of the original research for the B1700, initially codenamed the PLP ("Proper Language Processor" or "Program Language Processor"), was done at the Burroughs Pasadena plant. Production of the B1700s began in the mid-1970s and occurred at both the Santa Barbara and Liège, Belgium plants. The majority of design work was done at Santa Barbara with the B1830 being the notable exception designed at Liège. The B1000

164-422: A personal computer to communicate with remote devices. By using repeaters very large RS-485 networks can be formed. TSB-89A, Application Guidelines for TIA/EIA-485-A does not recommend using star topology. RS-485 signals are used in a wide range of computer and automation systems. In a computer system, SCSI -2 and SCSI-3 may use this specification to implement the physical layer for data transmission between

246-462: A "high-level language computer architecture"). The large systems were stack machines and very efficiently executed ALGOL . The medium systems (B2000, 3000, and B4000) were aimed at the business world and executing COBOL (thus everything was done with BCD including addressing memory.) The B1000 series was perhaps the only "universal" solution from this perspective because it used idealized virtual machines for any language. The actual hardware

328-486: A Sunday). The first parade was held in 1890 and was originally sponsored by the Valley Hunt Club , a Pasadena social club . The motivation for having the parade was, as member Professor Charles F. Holder said, "In New York, people are buried in snow. Here our flowers are blooming and our oranges are about to bear. Let's hold a festival to tell the world about our paradise." By 1895, the festivities had outgrown

410-630: A boon to Pasadena as Southern California became a major staging area for the Pacific War . High tech manufacturing and scientific companies made the city their home, a trend which continued in the decades following the war, notably with NASA 's Jet Propulsion Laboratory , Tetra Tech and Ameron International. In the 1950s, Pasadena saw a steady influx of people from the Southern United States , especially African-Americans from Texas and Louisiana . Pasadena also began hosting

492-450: A controller and a disk drive. RS-485 is used for low-speed data communications in commercial aircraft cabins' vehicle bus . It requires minimal wiring and can share the wiring among several seats, reducing weight. These are used in programmable logic controllers and on factory floors. RS-485 is used as the physical layer underlying many standard and proprietary automation protocols used to implement industrial control systems , including

574-643: A decade. A year later, the 210 Freeway was built along a newly chosen route. The freeway's construction was controversial, as it caused the demolition of over a thousand homes, many historic, and many claimed that the route was designed to cut off the city's less wealthy neighborhoods. Downtown Pasadena became dangerous in some parts and deserted in others, and incidences of murder and arson skyrocketed. Old Pasadena faced destruction as plans for new high-rise developments were drawn up, though they were mostly stopped by increasingly active preservation advocates. Pasadena suffered demographically as many residents moved for

656-432: A driver circuit which cannot be switched off, RS-485 drivers use three-state logic allowing individual transmitters to be deactivated. This allows RS-485 to implement linear bus topologies using only two wires. The equipment located along a set of RS-485 wires are interchangeably called nodes, stations or devices. The recommended arrangement of the wires is as a connected series of point-to-point (multidropped) nodes, i.e.

738-402: A female householder with no husband present, 2,460 (4.5%) had a male householder with no wife present. There were 3,016 (5.5%) unmarried partnerships . 18,838 households (34.1%) were made up of individuals, and 5,748 (10.4%) had someone living alone who was 65 years of age or older. The average household size was 2.42. There were 30,876 families (55.9% of all households); the average family size

820-524: A float, going through the parade together with the line of parades. The Rose Courts also represent their own local communities and their high school that they attend. The Rose Bowl , a National Historic Landmark , is host of the first and most famous college football postseason bowl game , the Tournament of Roses Rose Bowl Game, every New Year's Day. In 1895, the Tournament of Roses Association

902-485: A gesture of good will, Wilson added 2,000 acres (8 km ) of then-useless highland property, part of which would become Altadena . Colonel Jabez Banbury opened the first school on South Orange Grove Avenue. Banbury had twin daughters, named Jennie and Jessie. The two became the first students to attend Pasadena's first school on Orange Grove. At the time, the Indiana Colony was a narrow strip of land between

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984-456: A large immigrant community, particularly from China , Japan , Philippines , Mexico , Guatemala , El Salvador , Italy , Armenia , and India . The American Academy of Dramatic Arts , founded in 1884 in New York, opened its Pasadena campus in 1974. However, in 2001 the conservatory moved from Pasadena to Hollywood. Training actors for the stage in a two year program, the conservatory

1066-402: A line or bus , not a star , ring , or multiply connected network. Star and ring topologies are not recommended because of signal reflections or excessively low or high termination impedance. If a star configuration is unavoidable, special RS-485 repeaters are available which bidirectionally listen for data on each span and then retransmit the data onto all other spans. Ideally, the two ends of

1148-539: A merged result. The initial hardware implementations were built out of the Complementary Transistor Logic (CTL) Family originally made by Fairchild Semiconductor but with the introduction of the B1955 in 1979 the series employed the more popular (and more readily obtainable) TTL logic family. Up through the B1955, the control logic was implemented with PROMs , muxes and such. The B1965,

1230-538: A real estate boom. Tourist hotels were developed in the city. Pasadena became a winter resort for wealthy Easterners, spurring the development of new neighborhoods and business districts, and increased road and transit connections with Los Angeles. In 1940, when the Arroyo Seco Parkway , California's first freeway, connected Pad. By that time, Pasadena had become the eighth-largest city in California and

1312-463: A wide variety of restaurants, nightclubs, outdoor cafés, pubs, and comedy clubs. "One Colorado" features renovated historic architecture that attracted the new retail stores and restaurants. This development filled vacant buildings and was the impetus of the revitalization of Old Town on Colorado Boulevard . Paseo Colorado is an open-air mall that covers three city blocks, anchored on the west end by upscale grocery store Gelson's (recently closed), on

1394-657: A year at the Ambassador Auditorium and the Pasadena Pops plays at the Los Angeles County Arboretum and Botanic Garden . The Civic Center also holds a few traveling Broadway shows each year. RS485 RS-485 , also known as TIA-485(-A) or EIA-485 , is a standard, originally introduced in 1983, defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling

1476-699: Is balanced , and multipoint systems are supported. The standard is jointly published by the Telecommunications Industry Association and Electronic Industries Alliance (TIA/EIA). Digital communications networks implementing the standard can be used effectively over long distances and in electrically noisy environments . Multiple receivers may be connected to such a network in a linear, multidrop bus . These characteristics make RS-485 useful in industrial control systems and similar applications. RS-485 supports inexpensive local networks and multidrop communications links, using

1558-635: Is a city in Los Angeles County, California , United States, 11 miles (18 km) northeast of downtown Los Angeles . It is the most populous city and the primary cultural center of the San Gabriel Valley . Old Pasadena is the city's original commercial district. Its population was 138,699 at the 2020 census , making it the 45th largest city in California and the ninth-largest city in Los Angeles County. Pasadena

1640-514: Is a large swap meet that involves thousands of dealers and tens of thousands of visitors in and around the grounds of the Rose Bowl. The merchandise on display ranges from old world antiques to California pottery to vintage clothing. The flea market has been held every second Sunday of the month since 1967. According to the City's 2022 Comprehensive Annual Financial Report, the top employers in

1722-755: Is bounded by the Raymond Fault line, the San Rafael Hills , and the San Gabriel Mountains . The Arroyo Seco , a major geographic feature and home of the Rose Bowl, flows from headwaters in Pasadena's towering Angeles National Forest greenbelt in the San Gabriel Mountains . According to the United States Census Bureau, the city has a total area of 23.1 square miles (60 km ), over 99% of it land; 0.68%

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1804-407: Is distinguished from other machines in that it had a writeable control store allowing the machine to emulate any other machine. The Burroughs MCP (Master Control Program) would schedule a particular job to run. The MCP would preload the interpreter for whatever language was required. These interpreters presented different virtual machines for COBOL , Fortran , etc. A notable idea of

1886-500: Is not assured by compliance with the signal levels alone. The RS-485 differential line consists of two signals: Because a mark (logic 1) condition is traditionally represented (e.g. in RS-232) with a negative voltage; and space (logic 0) represented with a positive one, A may be considered the non-inverting signal and B as inverting. The RS-485 standard states (paraphrased): The truth tables of most popular devices, starting with

1968-414: Is typically sparse, but the marine layer becomes more persistent. Locals have dubbed June " June Gloom " as it is the cloudiest month despite being the 3rd driest month. By July, the marine layer subsides as inland areas cool due to an increased monsoon flow. Heatwaves from July through October can be oppressive and lengthy. In addition, it rarely rains during the summer and fall months, and only does when

2050-663: Is water. Pasadena has a Mediterranean climate ( Köppen Csa ), with typically hotter summers and slightly cooler winters than nearby coastal areas. Its location relative to the San Gabriel mountains allows the orographic lift to add several more inches of rainfall per year than nearby areas. During the first few months of the year, Pasadena experiences cool to warm highs, typically in the upper 60s (16–18 °C) to lower 70s (21–24 °C). Colder days are usually accompanied by heavier rain. By April, temperatures warm further, and rain tapers off significantly. By May and June, rain

2132-487: Is well represented in Pasadena. The architectural firm Greene and Greene developed the style; many of its residences still stand. Two examples of their Ultimate bungalow are the masterpiece Gamble House , of which public tours are available, and the Robert R. Blacker House , both designated California Historical Landmarks and enrolled on the U.S. National Register of Historic Places . The Second World War proved to be

2214-589: Is wise to add some current limiting to the SC connection. Grounds between buildings may vary by a small voltage, but with very low impedance and hence the possibility of catastrophic currents – enough to melt signal cables, PCB traces, and transceiver devices. RS-485 does not specify any connector or pinout. Circuits may be terminated on screw terminals , D-subminiature connectors, or other types of connectors. The standard does not discuss cable shielding but makes some recommendations on preferred methods of interconnecting

2296-470: The A and B connections, an optional, third connection may be present (the TIA standard requires the presence of a common return path between all circuit grounds along the balanced line for proper operation) called SC , G or reference , the common signal reference ground used by the receiver to measure the A and B voltages. This connection may be used to limit the common-mode signal that can be impressed on

2378-653: The DMX512 protocol. RS-485 serves as a physical layer for the AES3 digital audio interconnect. RS-485 is also used in building automation as the simple bus wiring and long cable length is ideal for joining remote devices. It may be used to control video surveillance systems or to interconnect security control panels and devices such as access control card readers. It is also used in Digital Command Control (DCC) for model railways . The external interface to

2460-718: The Los Angeles Basin for thousands of years. Pasadena means "valley" in the language of the Ojibwe , a Native American tribe not local to the region. The name was chosen by American colonists from Indiana who would later move to the area. The Spanish first colonized the Los Angeles Basin in the 1770s as part of the Viceroyalty of New Spain , building the San Gabriel Mission and renaming

2542-935: The Planetary Society , the Pasadena Playhouse , the Ambassador Auditorium , the Norton Simon Museum , and the USC Pacific Asia Museum . The earliest known inhabitants of Pasadena and its surroundings were members of the Native American Hahamog-na tribe, a branch of the Tongva Nation. They spoke the Tongva language , part of the Uto-Aztecan language group. Native Americans had lived in

Burroughs B1700 - Misplaced Pages Continue

2624-477: The physical layer . It does not specify or recommend any communications protocol ; Other standards define the protocols for communication over an RS-485 link. The foreword to the standard references The Telecommunications Systems Bulletin TSB-89 which contains application guidelines, including data signaling rate vs. cable length, stub length, and configurations. Section 4 defines the electrical characteristics of

2706-403: The " semantic gap " between the ideal expression of the solution to a particular programming problem, and the real physical hardware illustrated the inefficiency of current machine implementations. The three Burroughs architectures represent solving this problem by building hardware aligned with high-level languages, so-called language-directed design (contemporary term; today more often called

2788-528: The A/B naming: RS-485 standard conformant drivers provide a differential output of a minimum 1.5 V across a 54-Ω load, whereas standard conformant receivers detect a differential input down to 200 mV. The two values provide a sufficient margin for a reliable data transmission even under severe signal degradation across the cable and connectors. This robustness is the main reason why RS-485 is well suited for long-distance networking in noisy environment. In addition to

2870-624: The Arroyo Seco and Fair Oaks Avenue . On the other side of the street was Wilson's Lake Vineyard development. After more than a decade of parallel development on both sides, the two settlements merged into the City of Pasadena. The region drew people from across the country. In 1887, the Atchison, Topeka and Santa Fe Railway opened its Second District and began making stops at the Santa Fe Depot in downtown Pasadena. This triggered

2952-463: The Arroyo Seco area. The new stadium hosted its first New Year's Day football game in 1923. It was soon christened "The Rose Bowl", as was the game itself . The Rose Bowl , also holds annual Fourth of July events in its stadium. Since fireworks are illegal in Los Angeles County. Due to fireworks being banned or illegal, people gather together at the Rose Bowl to watch the night sky light up with colorful fireworks. The legendary Pasadena Playhouse ,

3034-477: The CPU actually drove the adapter state machines through their operations with successive accesses. Later models of the machines in both the 1800 and 1900 series could be configured as either a single or dual processor. These were tightly coupled machines and competed in access to the main memory. The B1955 and B1965 could accommodate up to four processors on the memory bus, but at least one of these would be assigned to

3116-524: The DCC command station is often RS-485 used by hand-held controllers or for controlling the layout in a networked PC environment. 8P8C modular connectors are used in this case. RS-485 does not define a communication protocol ; merely an electrical interface. Although many applications use RS-485 signal levels, the speed, format, and protocol of the data transmission are not specified by RS-485. Interoperability of even similar devices from different manufacturers

3198-518: The EIA/TIA officially replaced RS with EIA/TIA to help identify the origin of its standards. The EIA has officially disbanded and the standard is now maintained by the TIA as TIA-485, but engineers and applications guides continue to use the RS-485 designation. The initial edition of EIA RS-485 was dated April 1983. RS-485 only specifies the electrical characteristics of the generator and the receiver:

3280-668: The Mexican owners of Rancho del Rincon de San Pascual was Manuel Garfias , who retained title to the property through the American conquest of California in 1848 and statehood in 1850. Garfias sold sections of the property to the first Anglo settlers to come into the area: Dr. Benjamin Eaton , the father of Fred Eaton ; and Dr. S. Griffin. Much of the property was purchased by Benjamin Wilson , who established his Lake Vineyard property in

3362-461: The Multi-Line adapter which supplied serial I/O to the system. Only Dual-processor configurations were ever actually sold. The Multi-Line was capable of driving multiple 19.2Kb RS485 serial lines in a multi-drop configuration. The serial I/O was polled. A given terminal would wait until it was addressed, and grab the line and send any data it had pending. The Multi-Line Adapter would DMA

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3444-672: The Rose Court. There are total 7 candidates that advances to the Rose Court and one is chosen to be the Rose Queen and the others to be the Rose Princess. The Rose Court's main goal is to support local communities and local stores. They visit small stores owned by local residents to boost the activity of the area and to keep them in the current flow of the economics. During the Rose Parade, the Rose Court members are also on

3526-492: The SN75176, show the output signals inverted. This is in accordance with the A/B naming used by most differential transceiver manufacturers, including: These manufacturers all agree on the meaning of the standard, and their practice is in widespread use. The issue also exists in programmable logic controller applications. Care must be taken when using A/B naming. Alternate nomenclature is often used to avoid confusion surrounding

3608-565: The Santa Ana winds. The Santa Ana winds can produce heat, high winds, power outages, tree damage and an increased wildfire threat whenever they strike. By December, lows typically drop into the 40s (below 10 °C) with the occasional reading in the 30s (under 5 °C and down to freezing). Highs remain around 68 °F (20 °C) with heatwaves pushing temperatures into the mid-80s (around 30 °C). A high temperature of at least 85 °F (29 °C) has been recorded on all 365 days of

3690-684: The State Theater of California, is a member supported theater company that celebrated their centennial season in 2018. The theater puts on five shows a year. In 1937, the Pasadena Playhouse established a record as the only theatre in the United States to have staged the entire Shakespearean canon. Today, the Playhouse is known for their innovative productions. The Pasadena Symphony , founded in 1928, offers several concerts

3772-523: The Valley Hunt Club, and the Tournament of Roses Association was formed to take charge of the parade. The Rose Parade, as it is familiarly known, traditionally features elaborate floats, bands and equestrian units. According to the organizers, "Every inch of every float must be covered with flowers, or other natural materials, such as leaves, seeds, or bark. On average a float requires about 100,000 flowers and greenery. Volunteer workers swarm over

3854-543: The best view along the parade route. The Rose Parade is satirized by the popular Doo Dah Parade , an annual event that originated in Old Pasadena in 1978, and soon gained national notoriety. Reader's Digest named the Doo Dah Parade "America's Best Parade", and was a recent feature in 50 Places You Must Visit Before You Die! . It was formerly held around Thanksgiving, a month before the Rose Parade, but

3936-531: The cable will have a termination resistor connected across the two wires. Without termination resistors, signal reflections off the unterminated end of the cable can cause data corruption. Termination resistors also reduce electrical noise sensitivity due to the lower impedance . The value of each termination resistor should be equal to the cable characteristic impedance (typically, 120 ohms for twisted pairs). The termination also includes pull up and pull down resistors to establish bias for each data wire for

4018-436: The case when the lines are not being driven by any device. This way, the lines will be biased to known voltages and nodes will not interpret the noise from undriven lines as actual data; without biasing resistors, the data lines float in such a way that electrical noise sensitivity is greatest when all device stations are silent or unpowered. The EIA once labeled all its standards with the prefix RS ( Recommended Standard ), but

4100-410: The city are: Other companies based in Pasadena include Idealab , Inter-Con Security , Green Dot Corporation , Tetra Tech , Wesco Financial , OpenX , Stark Spirits Distillery, and Wetzel's Pretzels . The Los Angeles office of China Eastern Airlines is also located in Pasadena. Pasadena is home to the Tournament of Roses Parade, held each year on January 1 (or on January 2, if the 1st falls on

4182-656: The city is located just north-west of the townhall on the other side of Garfield Avenue. The 2010 United States Census reported that Pasadena had a population of 137,122. The population density was 5,928.8 inhabitants per square mile (2,289.1/km ). The racial makeup of Pasadena was 76,550 (55.8%) White , 14,650 (10.7%) African American , down from 19.0% in 1990, 827 (0.6%) Native American , 19,595 (14.3%) Asian , 134 (0.1%) Pacific Islander , 18,675 (13.6%) from other races , and 6,691 (4.9%) from two or more races. Hispanic or Latino residents of any race numbered 46,174 persons (33.7%). Non-Hispanic White residents were 38.8% of

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4264-564: The data into main memory in a linked list format. Consequently, the processors didn't have to deal with serial I/O interrupt issues. This was taken care of by the fact that block mode terminals were the only type supported. The B1000 series could address a maximum of 2 megabytes of memory. In these days of multiple gigabytes that sounds fairly limiting, but most commercial installations got by with hundreds of kilobytes of storage. Pasadena, California Pasadena ( / ˌ p æ s ə ˈ d iː n ə / PAS -ə- DEE -nə )

4346-614: The early 1900s and was demolished in 1934. The world-famous Mount Lowe Railway and associated mountain hotels shut down four years later due to fire damage. Three hotel structures have survived, the Green Hotel (a co-op since 1926), the Vista Del Arroyo (now used as a Federal courthouse), and a residential tower of the Maryland at 80 North Euclid Avenue (a co-op since 1953). The American Craftsman era in art and design

4428-543: The east end by Macy's (also closed) and Arclight Cinemas centers the middle portion of the mall. Another shopping district is located in the South Lake Avenue neighborhood. On Lake Avenue, a Macy's department store and furniture gallery is in a registered California historical landmark. The building was originally designed and built as the fourth Bullock's department store in the mid-1950s (the last freestanding store they constructed). The Rose Bowl Flea Market

4510-635: The eastern Pacific and dry years with La Niña cold water conditions. The most rainfall in one month was 19.70 inches (500.4 mm) in February 1980. The most rainfall in 24 hours was 7.70 inches (195.6 mm) on March 2, 1938. Situated at the base of the San Gabriel Mountains, snow is known to fall occasionally in Pasadena. The heaviest snowfall in Pasadena history occurred on January 11, 1949; 8 inches (20.3 cm) fell at Pasadena's city hall and more than 14 inches (35.6 cm) fell in

4592-548: The find a secret, Berry code-named the area "Muscat" after the grape that Wilson grew. To raise funds to bring the company of people to San Pascual, Berry formed the Southern California Orange and Citrus Growers Association and sold stock in it. The newcomers were able to purchase a large portion of the property along the Arroyo Seco and on January 31, 1874, they incorporated the Indiana Colony . As

4674-399: The floats in the days after Christmas, their hands and clothes covered with glue and petals." The most perishable flowers are placed in small vials of water, which are placed onto the float individually. Over the almost 3 hours of the parade, floats, and participants travel over five miles (8.0 km) and pass by over one million viewers who traditionally camp out over New Year's Eve to have

4756-413: The foothills above the city. The most recent snowfall in Pasadena was 1 inch (2.5 cm) on February 21, 2019. On November 30 and December 1, 2011, Pasadena, along with surrounding communities, was struck by a major windstorm caused by Santa Ana winds. The city suffered heavy damage with trees toppled, buildings damaged and even the roof of a gas station torn off. The official NOAA weather station for

4838-411: The generator (transmitter or driver), receiver, transceiver, and system. These characteristics include: definition of a unit load, voltage ranges, open-circuit voltages, thresholds, and transient tolerance. It also defines three generator interface points (signal lines); A, B and C. The data is transmitted on A and B. C is a ground reference. This section also defines the logic states 1 (off) and 0 (on), by

4920-455: The last of the series, was implemented with a pair of microcode sequencers which stayed in lock step with each other. The majority of the instructions executed in a single cycle. This first cycle was decoded by FPLAs using 16 inputs (just the perfect size for a 16-bit instruction word) and 48 min-terms . Successive cycles from a multi-cycle instruction were sourced from PROMs. The FPLAs and PROM outputs were wired together. The FPLA would drive

5002-481: The local Tongva people "Gabrielino Indians", after the name of the mission. Today, several bands of Tongva people live in the Los Angeles area. In 1821, Mexico became independent of Spain, and California came under control of the Mexican government. In 1833, the mission lands were secularized and most of the lands in California were granted to private Mexican citizens in the form of ranchos. Present-day Pasadena

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5084-519: The machine language. One concession to the fact that Burroughs was primarily a supplier to business (and thus running COBOL) was the availability of BCD arithmetic in the ALU . Internally, the machines employed 16-bit instructions and a 24-bit data path. The bit addressable memory supported the mix quite efficiently. Internally, the later generation memories stored data on 32-bit boundaries, but were capable of reading across this boundary and supplying

5166-489: The most common versions of Modbus and Profibus . DH 485 is a proprietary communications protocol used by Allen-Bradley in their line of industrial control units. Utilizing a series of dedicated interface devices, it allows PCs and industrial controllers to communicate. Since it is differential, it resists electromagnetic interference from motors and welding equipment. In theatre and performance venues, RS-485 networks are used to control lighting and other systems using

5248-579: The nearby suburbs or the Inland Empire , causing an overall decrease in population. Despite these setbacks, many local artists and hipsters moved in to take advantage of low property values. Their legacy can be seen today in the Doo Dah Parade which began in 1976. In 2014, several arrests were made involving an embezzlement scheme which stole an estimated $ 6.4 million from the city's Underground Utility Program. The greater Pasadena area

5330-458: The output on the first cycle, then get tri-stated. The PROMs would drive the control lines until the completion of the instruction. The I/O system for the B1000 series consisted of a 24-bit data path and control strobes to and from the peripherals. The CPU would place data on the data path, then inform the peripheral that data was present. Many of the peripheral adapters were fairly simplistic, and

5412-675: The parade is now held in January. In 2011, after 33 years in Pasadena, the parade moved to East Pasadena for the first time. It features unusual and absurd entrants such as the BBQ & Hibachi Marching Grill Team, the Men of Leisure, and the Bastard Sons of Lee Marvin. Proceeds from the parade's pancake breakfast, T-shirts, and after-party are donated to charity. The Tournament of Roses also auditions local female high school students to be part of

5494-534: The polarity between A and B terminals. If A is negative with respect to B, the state is binary 1. The reversed polarity (A positive with respect to B) is binary 0. The standard does not assign any logic function to the two states. RS-485, like RS-422, can be made full-duplex by using four wires. Since RS-485 is a multi-point specification, however, this is not necessary or desirable in many cases. RS-485 and RS-422 can interoperate with certain restrictions. Converters between RS-485 and RS-232 are available to allow

5576-498: The population living below the federal poverty line. For people ages 25 and over, 88.3% had a high school degree or higher while 52.3% had a Bachelor's degree or higher. According to Mapping L.A. , Mexican and English were the most common ethnic ancestries cited by residents in 2000. Mexico and the Philippines were the most common foreign places of birth. Old Town Pasadena spans 21 blocks downtown. It boasts shops and

5658-414: The population, down from 70.4% in 1970. The Census reported that 133,629 people (97.5% of the population) lived in households, 2,472 (1.8%) lived in non-institutionalized group quarters, and 1,021 (0.7%) were institutionalized. There were 55,270 households, out of which 14,459 (26.2%) had children under the age of 18 living in them, 22,285 (40.3%) were married couples living together, 6,131 (11.1%) had

5740-422: The receiver inputs. The allowable common-mode voltage is in the range −7 V to +12 V, i.e. ±7 V on top of the 0–5 V signal range. Failure to stay within this range will result in, at best, signal corruption, and, at worst, damage to connected devices. Care must be taken that an SC connection, especially over long cable runs, does not result in an attempt to connect disparate grounds together – it

5822-535: The remnants of hurricanes and tropical storms pass by. In fact, some days in both July and August have never recorded rainfall. It is not impossible to go 6 months without measurable precipitation. The average highest temperature recorded each year is around 106 °F (41 °C). The hottest heatwaves of the year usually occur in mid to late September. By late October, temperatures drop off. By November, Pacific storms return to Pasadena, bringing increasingly heavy rain and cooler weather. Along with them, however, are

5904-424: The same differential signaling over twisted pair as RS-422 . It is generally accepted that RS-485 can be used with data rates up to 10  Mbit/s or, at lower speeds, distances up to 1,200 m (4,000 ft). As a rule of thumb , the speed in bit/s multiplied by the length in meters should not exceed 10 . Thus a 50-meter cable should not signal faster than 2 Mbit/s . In contrast to RS-422, which has

5986-625: The vicinity. Wilson, known as Don Benito to the local Indians, also owned the Rancho Jurupa ( Riverside, California ) and was mayor of Los Angeles . He was the grandfather of WWII General George S. Patton, Jr. and the namesake of Mount Wilson . In 1873, Wilson was visited by Dr. Daniel M. Berry of Indiana, who was looking for a place in the country that could offer a mild climate for his patients, most of whom suffered from respiratory ailments. Berry, an asthmatic, concluded that he had his best three nights' sleep at Rancho San Pascual. To keep

6068-530: The year, with temperatures over 100 °F (38 °C) possible April through early November. Pasadena averages 20.08 inches (510.0 mm) of rain a year, about 6 inches (150 mm) more than nearby Los Angeles due to the orographic effect created by the San Gabriel Mountains . The wettest "rain year" was from July 1940 to June 1941 with 46.32 inches (1,176.5 mm) and the driest from July 1960 to June 1961 with 7.18 inches (182.4 mm). Wet years are commonly associated with El Niño warm surface water in

6150-438: Was 2.3%; the rental vacancy rate was 6.6%. 64,306 people (46.9% of the population) lived in owner-occupied housing units and 69,323 people (50.6%) lived in rental housing units . According to the 2010 United States Census, Pasadena had a median household income of $ 69,302, with 13.2% of the population living below the federal poverty line . During 2015–2019, Pasadena had a median household income of $ 83,068, with 14.5% of

6232-654: Was 3.18. The age distribution of the population was as follows: 26,507 people (19.3%) were under the age of 18, 12,609 people (9.2%) aged 18 to 24, 45,371 people (33.1%) aged 25 to 44, 34,073 people (24.8%) aged 45 to 64, and 18,562 people (13.5%) who were 65 years of age or older. The median age was 37.2 years. For every 100 females, there were 95.1 males. For every 100 females age 18 and over, there were 93.5 males. There were 59,551 housing units at an average density of 2,574.8 units per square mile (994.1 units/km ), of which 24,863 (45.0%) were owner-occupied, and 30,407 (55.0%) were occupied by renters. The homeowner vacancy rate

6314-509: Was built to enhance this capability. Perhaps the most obvious examples were the bit-addressable memory, the variable size arithmetic logic unit (ALU), and the ability to OR in data from a register into the instruction register allowing very efficient instruction parsing. Another feature of the machine language was the appearance of having the output of the ALU appear as different addressable registers. X+Y, and X-Y are two read-only registers within

6396-512: Was divided between Rancho San Rafael (lands west of the Arroyo Seco extending to present-day Burbank in the northwest to Glassell Park in the southwest), Rancho del Rincon de San Pascual , (present-day central Pasadena, Altadena , and South Pasadena ), and Rancho Santa Anita (present-day east Pasadena, Arcadia, and Monrovia). Rancho del Rincon de San Pascual was so named because it was deeded on Easter Sunday to Eulalia Perez de Guillén Mariné of Mission San Gabriel Arcángel . The last of

6478-401: Was formed to take charge of the parade. In 1902, the association declared that a football game would be added to the day's events. This was the first post-season college football game to be played on New Year's Day and is known as, "The Grandaddy of Them All"; many other football stadiums followed suit. After two decades, the game outgrew its original facility, and a new stadium was constructed in

6560-671: Was incorporated on June 19, 1886, becoming one of the first cities to be incorporated in what is now Los Angeles County, following the city of Los Angeles (April 4, 1850). Pasadena is known for hosting the annual Rose Bowl football game and Tournament of Roses Parade . It is also home to many scientific, educational, and cultural institutions, including the California Institute of Technology , Pasadena City College , Kaiser Permanente Bernard J. Tyson School of Medicine , Fuller Theological Seminary , Theosophical Society , Parsons Corporation , Art Center College of Design ,

6642-488: Was the first school in the United States to offer professional education in the field of acting. Point Loma Nazarene University was located in Pasadena for many years before relocating to San Diego County , and retained the names Pasadena University and Pasadena College. In 1969, the Pasadena Unified School District was desegregated, though the issue would continue to be fought in court for

6724-530: Was widely considered a twin city to Los Angeles. The first of the hotels to be established in Pasadena was the Raymond (1886) atop Bacon Hill, renamed Raymond Hill after construction.The original Mansard Victorian 200-room facility burned down on Easter morning of 1895, was rebuilt in 1903, and razed during the Great Depression to make way for residential development. The Maryland Hotel existed from

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