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The PDP-10 does not use memory-mapped devices, in contrast to the PDP-11 and later DEC machines. A separate set of instructions is used to move data to and from devices defined by a device number in the instruction. Bits 3 to 9 contain the device number, with the 7 bits allowing a total of 128 devices.
The device used a stepper motor and a formerly hand-held wire stripper tool and cutter, operated by solenoid, all under computer control from ITS software. The device was accessible by any ITS user, but was disappointingly unreliable in actual use. The Xerox Graphics Printer (XGP), one of the first laser printers, was supported by ITS by 1974. [14]
The series comprised the DECsystem 5810, 5820, 5830, and 5840, with the third digit referring to the number of processors. These systems were the MIPS/RISC alternatives of the VAX 6000 operating the XMI and BI bus. [2] The 5810 and 5820, using 25 MHz R3000 microprocessors and R3010 floating-point coprocessors, were introduced on 11 July 1989. [2]
Most of the work centered on emulating the BBN pager hardware in a combination of software and the KI-10's simpler hardware. The speed of the KI-10 compared to the PDP-6 made this possible. Additionally the porting effort required a number of new device drivers to support the newer backing store devices being used.
The PDP-10 was widely used in university settings, and thus was the basis of many advances in computing and operating system design during the 1970s. DEC later re-branded all of the models in the 36-bit series as the "DECsystem-10", and PDP-10s are generally referred to by the model of their CPU, starting with the "KA10", soon upgraded to the ...
DECSYSTEM-2020 front panel 2 DECSYSTEM-2020 KS-10s (1979) at the Living Computer Museum. The DECSYSTEM-20 was a family of 36-bit Digital Equipment Corporation PDP-10 mainframe computers running the TOPS-20 operating system and was introduced in 1977.
PDP-6, [1] PDP-10/DECsystem-10, DECSYSTEM-20 [4] Most significant bits ... Similary, a three-character device name such as "DL1" could also be stored in a 16-bit word ...
By the time SC shipped the first SC-30M to Stanford University in late 1985, most customers had already abandoned the PDP-10, usually for VMS or Unix systems. Nevertheless, a number were purchased by CompuServe, which depended on PDP-10s to run its online service and was eager to move to newer but fully compatible systems. CompuServe's demand ...