https://gunkies.org/index.php?action=history&feed=atom&title=KY11-D_Programmer%27s_ConsoleKY11-D Programmer's Console - Revision history2026-09-26T13:21:59ZRevision history for this page on the wikiMediaWiki 1.43.9https://gunkies.org/w/index.php?title=KY11-D_Programmer%27s_Console&diff=30223&oldid=prevJnc: Jnc moved page KY11-D Console to KY11-D Programmer's Console: Official DEC name2023-06-30T18:32:40Z<p>Jnc moved page <a href="/wiki/KY11-D_Console" class="mw-redirect" title="KY11-D Console">KY11-D Console</a> to <a href="/wiki/KY11-D_Programmer%27s_Console" title="KY11-D Programmer's Console">KY11-D Programmer's Console</a>: Official DEC name</p>
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<p><b>New page</b></p><div>[[Image:PDP1140FrontPanel.jpg|350px|right|thumb|KY11-D front panel]]<br />
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The '''KY11-D Programmer's Console''' is the [[front panel]] for the [[KD11-A CPU]] used in the [[PDP-11/35]] and [[PDP-11/40]]. It allows a programmer to display and deposit data in [[main memory]], and start, [[halt]] and [[single-step]] the [[Central Processing Unit|CPU]].<br />
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It consists of a large [[printed circuit board|board]] containing lights and switches, to which is attached a light shield (a flat plate with holes drilled through it, which prevents light from one light from straying into neighbouring light positions). It is connected to the CPU by a number of [[flat cable]]s which plug into [[Berg connector|Berg headers]] on the console's board, and on boards of the CPU. There is also a printed plastic inlay, and a metal bezel which holds the inlay in position, and bolts to the [[BA11-F Mounting Box]] (also [[BA11-D Mounting Box|BA11-D]] and [[BA11-K Mounting Box|BA11-K]]) which holds the CPU. <br />
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==Displays and controls==<br />
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<!-- [[Image:PDP-11-40FrontPanel.jpg|400px|left|thumb|Front pane details]]<br />
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The 'Address/Data' indicator array display memory [[address]]es and data. The 'Run' light indicates that the CPU is [[execute|executing]] [[instruction]]s.<br />
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The '[[switch register]]' is used to enter both addresses and data. The 'Load Addr' (Address), 'Exam' (Examine), 'Start', and 'Dep' (Deposit) switches perform the named function. If the CPU is halted, toggling the 'Continue' switch does a variety of things, depending on the position the 'Enable/Halt' switch is in. In the Enable position, the CPU continues operating; in the Halt position, it performs a single instruction.<br />
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==Implementation==<br />
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Most front panel operations are implemented by [[microcode]] in the CPU. (See Section 3.2.1, "KY11-D Programmer's Console" in the ''KD11-A processor manual'', below, for details.) Therefore, the CPU must be basically fully functional for the front panel to work.<br />
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<!-- ==Further reading==<br />
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* ''KY11-D Console Illustrated Parts Breakdown'' (EK-KY11D-IP) - not online<br />
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==External links==<br />
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* [http://www.bitsavers.org/pdf/dec/pdp11/1140/DEC-11-HKDAA-A-D_KD11-A_Processor_Manual.pdf KD11-A processor manual] (DEC-11-HKDAA-A-D)- the KY11-J is covered in Section 3.2.1 and Chapter 6 (pp. 37-39 and 207-209 of the PDF)<br />
* [http://www.bitsavers.org/pdf/dec/pdp11/1140/PDP-1140_System_Engr_Drawings_Rev_P_Jun74.pdf PDP-11/40 system engineering drawings] (pp. 161-165 of the PDF)<br />
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[[Category: UNIBUS PDP-11s]]</div>Jnc