Remember the PDP 11
PDP 11/05 ( 1972 ) PDP11/20 ( 1970 )
DIGITAL introduces the PDP-11/05 and PDP-11/10 as the first "inexpensive" PDP-11s. |
The PDP-11/20, the first of DIGITAL's 16-bit family of machines, is delivered. |
PDP11/23 ( 1979 ) PDP11/24 ( 1981 )
The PDP-11/23 was positioned between the low-end PDP-11/03 and the PDP-11/34 in order to round out DIGITAL'S 16-bit product line and bridge the gap between existing microcomputers and mid-range systems. |
The PDP-11/24 was a fourth generation PDP-11 system designed to increase DIGITAL's penetration of the Technical and Commercial OEM markets. The new machine featured Large Scale Integration, 1 MB memory capacity and the PDP-11 UNIBUS. |
PDP11/34 ( 1975 ) PDP11/40 ( 1972 )
The midrange PDP-11/34 was DIGITAL's most successful PDP-11 in terms of unit volume. The 11/34 featured a CPU so compact that the entire CPU logic was contained on two circuit boards. This provided greater flexiblity during later system expansion by making additional chassis space available. |
The PDP-11/40 offered approximately twice the processing power of the earlier PDP-11/20. A floating point package was offered as an option, making the cost slightly lower than the 11/20. |
The PDP-11/44 incorporated the complete PDP-11/70 instruction set and memory expansion into 1MB in a lower-cost package. The PDP-11/44 was the last PDP-11 implemented in discrete logic. |
The PDP-11/45 was an excellent computational tool for large multi-user, multi-task installations. Through memory management, memory could be expanded to 128K, which included a combination of bi-polar and MOS memory. Other features included a greatly expanded floating point processor. |
PDP11/60 ( 1977 ) PDP11/70 ( 1975 )
The PDP-11/60 offered a combination of unique attributes, which were normally found in larger, more expensive computers at the time. Designed around the proven UNIBUS architecture, the PDP-11/60 included user control store features previously unavailable from DIGITAL as well as several 11/70 class features such as cache memory and RAMP. |
The PDP-11/70 represented the high end of PDP-11 architecture with the capacity for supporting the speed, addressing range and bandwidth required in large systems applications. It was the first PDP-11 to use cache memory. |
The 20th anniversary of the first PDP-11 computer is marked by the introduction of two new PDP-11 systems: the MicroPDP-11/93 and the PDP-11/94. Both the MicroPDP-11/93 and the PDP-11/94 offered a performance increase of up to 40% over the previous high-end PDP-11 systems. The new machines were the latest members of the longest-lived family of general-purpose computers. At this point, the series included over 20 members; more than 600,000 had been installed. |
Copyright © 1998 [Cornelis van Pieterson, The Netherlands].
All rights reserved.
Revised:
May 31, 2007