Jnc: static RAM, no refresh

2023-07-07T14:49:33Z

static RAM, no refresh

Jnc: not much, since we don't know much

2022-08-02T22:26:26Z

not much, since we don't know much

New page

The '''MSV11-A''' was a [[DEC card form factor|dual]]-height [[QBUS]] [[static RAM]] [[main memory]] card. They held 2KB when fully populated.

It is not clear if they were ever actually produced, or if they were merely announced, and then withdrawn before any were shipped; information on them is very limited.

Their starting [[address]] wass configured by use of [[jumper]]s. They were likely [[QBUS#Variable address size|Q16]] cards (hence, could not be used in Q18 or Q22 systems, such as [[PDP-11/23]]'s with more than 64KB of memory).


==External links==

* [http://bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] - the MSV11-A is covered on pp. 4-29—4-30 (pp. 67-68 of the PDF)

[[Category: QBUS Memories]]

@@ Line 1: / Line 1: @@
 <!-- [[Image:M794x.jpg|150px|thumb|right|M794x memory card]] -->
-The '''MSV11-A''' was a [[DEC card form factor|dual]]-height [[QBUS]] [[static RAM]] [[main memory]] card. They held 2KB when fully populated.
+The '''MSV11-A''' was a [[DEC card form factor|dual]]-height [[QBUS]] [[static RAM]] [[main memory]] card. (Being static RAM, they did not require [[memory refresh]].) They held 2KB when fully populated.
 It is not clear if they were ever actually produced, or if they were merely announced, and then withdrawn before any were shipped; information on them is very limited.
-Their starting [[address]] wass configured by use of [[jumper]]s. They were likely [[QBUS#Variable address size|Q16]] cards (hence, could not be used in Q18 or Q22 systems, such as [[PDP-11/23]]'s with more than 64KB of memory).
+Their starting [[address]] was configured by use of [[jumper]]s. They were likely [[QBUS#Variable address size|Q16]] cards (hence, could not be used in Q18 or Q22 systems, such as [[PDP-11/23]]'s with more than 64KB of memory).
 <!-- ==Further reading==
@@ Line 13: / Line 13: @@
 ==External links==
-* [http://bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] - the MSV11-A is covered on pp. 4-29&mdash;4-30 (pp. 67-68 of the PDF)
+* [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] (EK-LSI11-TM-002) - the MSV11-A is covered in Section 4.6 (pp. 67-68 of the PDF) and Chapter 7 (pp. 107-109 of the PDF)
 [[Category: QBUS Memories]]

MSV11-A static MOS memory - Revision history

Jnc: static RAM, no refresh

Jnc: not much, since we don't know much