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HP 2100A HP 1000 E-Series minicomputer with a 9895A dual 8-inch "flexible disc memory" drives. The HP 2100 is a series of 16-bit minicomputers that were produced by Hewlett-Packard (HP) from the mid-1960s to early 1990s. Tens of thousands of machines in the series were sold over its 25-year lifetime, making HP the fourth-largest minicomputer ...
Except for the 2000A and 2000E systems, the system is implemented using a dual-processor architecture.One fully configured HP 2100-series processor is used for the execution of most of the system code and all of the user code, while a second, smaller HP 2100-series processor is used to handle the RS-232 serial lines through which the time-sharing users connected.
Standard DMA, also called third-party DMA, uses a DMA controller. A DMA controller can generate memory addresses and initiate memory read or write cycles. It contains several hardware registers that can be written and read by the CPU. These include a memory address register, a byte count register, and one or more control registers.
AlphaServer 1000A Inside a DEC AlphaServer 1000A Alphaserver 1000A CPU board AlphaServer 2100A. AlphaServer is a series of server computers, produced from 1994 onwards by Digital Equipment Corporation, and later by Compaq and HP.
Midrange computers, or midrange systems, were a class of computer systems that fell in between mainframe computers and microcomputers. [1] [failed verification]This class of machine emerged in the 1960s, with models from Digital Equipment Corporation (PDP lines), Data General (), and Hewlett-Packard (HP 2100 and HP 3000) widely used in science and research as well as for business - and ...
The 16-bit word length thus became more common in the 1960s, especially on minicomputer systems. Early 16-bit computers (c. 1965–70) include the IBM 1130, [3] the HP 2100, [4] the Data General Nova, [5] and the DEC PDP-11. [6] Early 16-bit microprocessors, often modeled on one of the mini platforms, began to appear in the 1970s.
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HP never sold the standalone BPC commercially - it was only available in HP products. This fact has led to a great amount of confusion regarding the BPC, as it was a virtually undocumented device prior to Steve Leibson's extensive research into the development of the HP 9825 computer, which began sometime around 2004.