Digital PDP-11/04 BD
The PDP-11 was an extremely successful and influential family of machines which has spanned over two decades from the early 1970s through the mid 1990s. The first PDP-11 in 1970 cost $10,800 and was DEC's first and only 16 bit computer.
The 11/04 (September 1975) was an implementation of the Unibus pdp-11 architecture, and was essentially a replacement for the 11/05 & 11/10. It was the first pdp-11 to escape without a 'proper' lights & switches front panel, instead it had the glorified 'programmers console' as an option - a hex keypad and an LED display which showed address/data digitally.
It came in two chassis, like the 11/05 & 11/10 - a half-height example, which had the entire Unibus backplane, power supply, front panel - basically the whole computer - sliding into an evil jamming finger-trapping metal sleeve - and a full-height example, basically the same BA11 box as used by the 11/35 and many many other DEC applications. It's very similar to its higher-spec twin, the 11/34. Our model is the half height one.
The PDP 11/04 is a Unibus based 16-bit minicomputer which included the following boards:
M7263 KD11-D 11/04 processor module
M7847-DJ MS11-JP 16-Kword 18-bit RAM
M9312 Bootstrap terminator with 5 empty ROM sockets
M7859 KY11-LB Console interface; programmer's console
M7856 DL11-W RS-232 SLU & realtime clock option
G7273 Bus Grant & Non-processor grant
M8256 RX211 RX02 floppy disk controller
Our model PDP 11/04 BD has a serial number of AB 07040 as well as AB 07033 dated 22nd September 1978
Our machine was very kindly donated by John Millar and is in an unused condition.
Other Systems Related To Digital PDP-11/04 BD:
This exhibit has a reference ID of CH30094. Please quote this reference ID in any communication with the Centre for Computing History.
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