MM11-K core memory - Revision history

Jnc: /* External links */ +FMPS, manual

2022-01-26T08:41:32Z

‎External links: +FMPS, manual

Jnc: +images

2020-10-22T15:43:38Z

+images

Jnc: /* Documentation */ clarify

2018-09-06T22:43:34Z

‎Documentation: clarify

Jnc: Add jumper details and function

2018-02-23T00:03:59Z

Add jumper details and function

Jnc: extend slightly

2018-02-22T13:19:54Z

extend slightly

Jnc: Something on this poorly-documented memory

2018-02-22T03:55:33Z

Something on this poorly-documented memory

New page

'''MM11-K core memory''' is [[UNIBUS]] [[main memory]] which is effectively an earlier, smaller version of [[MM11-L core memory]].

Like the MM11-L, it consists of three cards, two of them the same as those of the MM11-L:

* G110 - [[DEC card form factor|hex-format]] memory control logic and data channels
* G231 - hex-format memory driver logic

The MM11-K also includes an 8 Kbyte H213 quad-format [[core memory]] stack card, instead of the 16 Kbyte H214 card of the MM11-L.

On the G110 module, two jumpers (W9 and W10) are set depending on whether it is being used with a 8 Kbyte or a 16 Kbyte core stack; on the G231 module, two other jumpers (J3 and J4) are similarly set depending on the size.

==Documentation==

MM11-K documentation does not appear to be extant; it is covered in the "[[PDP-11/05]] Technical Manual" (EK-11005-TM-003), Chapter 12, "MM11-K and L Detailed Descriptions"; and the MM11-L documentation is of course largely applicable.

==See also==

* [[UNIBUS memories]]

[[Category: UNIBUS Memories]]

@@ Line 1: / Line 1: @@
 '''MM11-K core memory''' is a rare [[UNIBUS]] [[main memory]] system which is effectively an earlier, smaller version of the common [[MM11-L core memory]].
@@ Line 7: / Line 9: @@
 The MM11-K also includes an 8 Kbyte H213 quad-format [[core memory]] stack card, instead of the 16 Kbyte H214 card of the MM11-L. It uses all the same custom [[backplane]]s as the MM11-L.
 On the G110 module, two jumpers (W9 and W10) are set depending on whether it is being used with a 8 Kbyte or a 16 Kbyte core stack; for the MM11-K, W9 is installed, and W10 is removed. On the G231 module, two other jumpers (J3 and J4) are similarly set depending on the size; for the MM11-K, J3 is in, and J4 is out.

@@ Line 8: / Line 8: @@
 The MM11-K also includes an 8 Kbyte H213 quad-format [[core memory]] stack card, instead of the 16 Kbyte H214 card of the MM11-L. It uses all the same custom [[backplane]]s as the MM11-L.
-On the G110 module, two jumpers (W9 and W10) are set depending on whether it is being used with a 8 Kbyte or a 16 Kbyte core stack; on the G231 module, two other jumpers (J3 and J4) are similarly set depending on the size.
+On the G110 module, two jumpers (W9 and W10) are set depending on whether it is being used with a 8 Kbyte or a 16 Kbyte core stack; for the MM11-K, W9 is installed, and W10 is removed. On the G231 module, two other jumpers (J3 and J4) are similarly set depending on the size; for the MM11-K, J3 is in, and J4 is out.
 ==Documentation==

@@ Line 18: / Line 18: @@
 ==Documentation==
-MM11-K documentation does not appear to be extant; it is covered in the "[[PDP-11/05]] Technical Manual" (EK-11005-TM-003), Chapter 12, "MM11-K and L Detailed Descriptions"; and other MM11-L documentation is of course largely applicable.
+MM11-K documentation does not appear to be extant; it is covered in the ''PDP-11/05 computer manual'' (below); and other MM11-L documentation is of course largely applicable.
 ==See also==
 * [[UNIBUS memories]]
 [[Category: UNIBUS Memories]]