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The Xerox 500 series is a discontinued line of computers from Xerox Data Systems (XDS) introduced in the early 1970s as backward-compatible upgrades for the Sigma series machines. Although orders for the Xerox 530 were deemed "encouraging" as of January 1974, [ 1 ] the systems had failed to gain traction by the time Xerox sold its Data Systems ...
In May 1975 a software update added support for tapes from Burroughs and Honeywell mainframes. [6] The attraction of offline printing from tape was that it reduced CPU utilization. [7] The Model 2 is both online and offline. [8] The Model 3 is an online version and can be attached to Xerox Sigma 6, Sigma 7 and Sigma 9 computer systems. [3]
The Xerox CE16 and CF16 minicomputers, announced in May 1969, were small 16-bit computers designed primarily for process control applications. Both systems came with a base 4 KW of 16-bit core memory, expandable to 16 KW, and three "interrupt channels." The CE16 CPU can perform an addition in 16 μsec and a (software) multiplication in 126 μsec.
The Xerox 500 series computers, introduced starting in 1973, were also compatible upgrades to the Sigma systems using newer technology. In 1975, Xerox sold its computer business to Honeywell, Inc. which continued support for the Sigma line for a time. An XDS Sigma 9 at the Living Computer Museum, Seattle, Washington, US, 2014
Firmware hacks usually take advantage of the firmware update facility on many devices to install or run themselves. Some, however, must resort to exploits to run, because the manufacturer has attempted to lock the hardware to stop it from running unlicensed code. Most firmware hacks are free software.
Drivers that may be vulnerable include those for WiFi and Bluetooth, [19] [20] gaming/graphics drivers, [21] and drivers for printers. [ 22 ] There is a lack of effective kernel vulnerability detection tools, especially for closed-source OSes such as Microsoft Windows [ 23 ] where the source code of the device drivers is mostly proprietary and ...
Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...
Xerox was founded in 1906 in Rochester, New York, as the Haloid Photographic Company. [11] It manufactured photographic paper and equipment. In 1938, Chester Carlson, a physicist working independently, invented a process for printing images using an electrically charged photoconductor-coated metal plate [12] and dry powder "toner".