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Movements, leaders, victories and the continuing fight for equality.
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Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
In August 1908, a white mob attacked Springfield, Illinois’s Black community, destroying homes and businesses and lynching two Black men. National outrage over the violence helped spur the movement that created the NAACP the following year.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
Maximite Microcomputer is a Microchip PIC32 microcontroller-based microcomputer. This series of chips uses the MIPS 32-bit RISC MIPS architecture and was neither an ARM nor PIC variant. Originally designed as a hobby kit, the Maximite was introduced in a three-part article in Silicon Chip magazine in autumn of 2011 by Australian designer Geoff Graham.[1] The project consists of two main components — a main circuit board and the MMBasic Interpreter, styled after GW-BASIC.
Maximite version 2.7 is still an open source project. Several hobbyists have produced their own custom versions, often using commercially available prototyping circuit boards.
Several Maximite clones were designed and released in the months following its introduction. Some, such as the Maximite SM1,[2] and Geoff Graham's latest version,[3] the Mini-Maximite, are hardware- and software-compatible with the original design, but use a different form factor.
Others, like the DuinoMite,[4] from the Bulgarian company Olimex, have altered the hardware by adding Arduino headers. This makes it easier to use hardware designed for Arduino boards, but modified firmware is needed to use this functionality. Some of these changes have been incorporated in the official version as it gets updated.
Australian Distributor Dontronics and United States programmer Ken Segler have been active in adapting the software to run on the different versions of the hardware.
Geoff Graham has also released an altered version of MMBasic [5] for the UBW32 development Board.
Maximite clones made by US producer CircuitGizmos remain compatible with the original Maximite design and include a very small CGMMSTICK1[6][7] that can be used with solderless breadboards, and a Colour Maximite compatible CGCOLORMAX1.[8]
MMBasic 3.x has support for user-defined subroutines and modern line-numberless structure. This MMBasic 3.x has been released in several versions including support for the Olimex Duinomite, UBW32 and CGMMStick variants.
While the versions of MMBasic prior to 3.x were available as free and open-source software distributed under the GNU General Public License, for the 3.x versions the license was changed to a proprietary one, with the source code available free of charge for personal use.
On 11 May 2013, an IC-style version named DTX2-4105C (later given the name "ICeemite"), entirely designed for inclusion into embedded systems was announced by the Australian company Dimitech.[9] This new revision of the original Maximite brings a real-time clock and a microSD card connector on board and fits into a PLCC-68 socket. As of the day of announcement it was the world's smallest full Maximite system. ICeemite offers custom-built firmware with additional extras used in embedded systems such as multitasking and power management, but does not support colour graphics.
A new version of the Maximite was featured in the September 2012 Issue of Silicon Chip Magazine.
New features in the Colour Maximite are.
Several software and hardware projects have been created utilizing the Maximite in the 12 months since it was first announced. These range from simple dataloggers to complex process controllers.
The Colour Maximite 2 was introduced in mid-2020, and was featured in the July 2020 issue of Silicon Chip magazine.[10]
Specifications:
The Colour Maximite 2 runs MMBasic 5.x and includes a compatibility mode to run programs written for the original Colour Maximite.
The Colour Maximite Gen 2 was announced in mid-2021, and was featured in the August 2021 issue of Silicon Chip magazine. This is an enhanced version of the Colour Maximite 2, relying on more surface mounted components than the Gen 1, thus being optimised for automated machine assembly.[11]
Enhancements over and above the Colour Maximite Gen 1 include upgraded graphics (1920 × 1080 with 24-bit colour), on board support for a mouse, accurate real-time clock, ESP-01 WiFi module and an extra Wii nunchuck port on the front panel.
As at April 2023, there are over 140 programs available for both versions of the Colour Maximite 2.[12]
The PicoMiteVGA (also known as the VGA PicoMite[13]) is an expansion board that turns a Raspberry Pi Pico running MMBasic 5.x for the Pico (also known as PicoMite) into a self-contained desktop computer that boots into a BASIC prompt.[14]
PicoMite MMBasic supports all the hardware features of the Raspberry Pi Pico (serial, I2C, SPI, CPU clock, ADC, etc), along with built-in support for many popular add-ons for the Pico including SD cards, LCD with a maximum resolution of 480 × 360 pixels, touch sensitive LCD screens, real-time clocks, infrared remote controls, temperature and humidity sensors, ultrasonic sensors and numeric keypads. Support for WS2812 LED strips is also included.[15]
Specifications:
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
Maximite Microcomputer is a Microchip PIC32 microcontroller-based microcomputer. This series of chips uses the MIPS 32-bit RISC MIPS architecture and was neither an ARM nor PIC variant. Originally designed as a hobby kit, the Maximite was introduced in a three-part article in Silicon Chip magazine in autumn of 2011 by Australian designer Geoff Graham. The project consists of two main components — a main circuit board and the MMBasic Interpreter, styled after GW-BASIC.
Maximites is a genus of Late Carboniferous ammonoids. Adult specimens were the smallest known ammonoids, only at about 1 cm (0.39 in) in diameter of shells. Fossils are found in various Late Carboniferous marine strata in North America. Maximites is the sole genus of Maximitidae, one of two families of the Superfamily Pseudohaloritoidea, an important subgroup of the order Goniatitida.
Pseudohaloritidae is the larger of two families that form the goniatitid superfamily Pseudohaloritoidea, the other being the monogenerc Maximitidae. They are part of the vast array of shelled cephalopods known as ammonoids that are more closely related to squids, belemnites, octopuses, and cuttlefish, than to the superficially similar Nautilus. The Pseudohaloritide which now contains some 14 genera in three subfamilies is characterized by small, subdiscoidal to subglobular, involute shells, the surface of which may be smooth or with coarse longitudinal lirae and/or transverse ribs. The siphuncle is retrosiphonitic, a hold-over character from the nautiloids, usually subcentral or situated within dorsal septal flexure but ventral-marginal in first and second whorls. Sutures have four pairs of lobes, the ventral one being rounded and spatulate, the interior three clustered and narrow. External lobes are either smooth are variably serrate. The Pseudohaloritidae was established by Miller and Furnish (1957) for three related genera with similar sutures and aberrant siphuncles that are removed from the ventral margin. One, Maximites, has been put in a family of its own, the Maximitidae. The other two, Neoaganides and Pseudohalorites are retained in the Pseudohaloritidae, to which has been added about a dozen more genera, mostly from China. Maximites differs in having a bifid ventral lobe and a siphuncle that is ventral, but not marginal. It is also older, as early as the Middle Pennsylvanian (m U Carb) rather than from the Upper Pennsylvanian (uU Carb) when pseudohaloritids, as emended, make their first appearance. Maximites is thought to have given rise to the Neoaganides and thus to the Pseudohaloritidae, and in turn may have been derived from Imitoceras. On the other hand, the suture indicates that Neoaganides may have developed directly from Imitoceras. The ventral lobe of Neoaganides is like that of Imitoceras, smooth and rounded, but the lateral lobes differ from those of both Imitoceras and Maximites in being pointed. The aberrant position of the siphuncle well away from the ventral margin and in some near the dorsum is characteristic of, although not unique to, this family. However no link is indicated between these Pennsylvanian and Permian forms and the Upper Devonian Clymeniids with their well established dorso-marginal siphuncles.
This list of monochrome and RGB palettes includes generic repertoires of colors (color palettes) to produce black-and-white and RGB color pictures by a computer's display hardware. RGB is the most common method to produce colors for displays; so these complete RGB color repertoires have every possible combination of R-G-B triplets within any given maximum number of levels per component. Each palette is represented by a series of color patches. When the number of colors is low, a 1-pixel-size version of the palette appears below it, for easily comparing relative palette sizes. Huge palettes are given directly in one-color-per-pixel color patches. For each unique palette, an image color test chart and sample image (truecolor original follows) rendered with that palette (without dithering) are given. The test chart shows the full 256 levels of the red, green, and blue (RGB) primary colors and cyan, magenta, and yellow complementary colors, along with a full 256-level grayscale. Gradients of RGB intermediate colors (orange, lime green, sea green, sky blue, violet, and fuchsia), and a full hue spectrum are also present. Color charts are not gamma corrected. These elements illustrate the color depth and distribution of the colors of any given palette, and the sample image indicates how the color selection of such palettes could represent real-life images. These images are not necessarily representative of how the image would be displayed on the original graphics hardware, as the hardware may have additional limitations regarding the maximum display resolution, pixel aspect ratio and color placement. Implementation of these formats is specific to each machine. Therefore, the number of colors that can be simultaneously displayed in a given text or graphic mode might be different. Also, the actual displayed colors are subject to the output format used - PAL or NTSC, composite or component video, etc. - and might be slightly different. For simulated images and specific hardware and alternate methods to produce colors other than RGB (ex: composite), see the List of 8-bit computer hardware palettes, the List of 16-bit computer hardware palettes and the List of video game console palettes. For various software arrangements and sorts of colors, including other possible full RGB arrangements within 8-bit color depth displays, see the List of software palettes.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Madam C.J. Walker
