MS11 32KB MOS memory - Revision history

Jnc: Avoid dab

2022-09-21T19:14:20Z

Avoid dab

Jnc: +External links - manuals, FMPS

2022-01-10T02:35:04Z

+External links - manuals, FMPS

Jnc: Add links

2018-07-14T13:54:46Z

Add links

Jnc: Parity functionality

2018-05-21T16:08:24Z

Parity functionality

Jnc: Addnl info

2018-05-21T15:09:32Z

Addnl info

Jnc: Fix cat (for real, this time)

2018-05-21T01:58:42Z

Fix cat (for real, this time)

Jnc: Fix cat

2018-05-21T01:57:36Z

Fix cat

Jnc: An OK start

2018-05-21T01:54:37Z

An OK start

New page

The '''MS11-E''', '''MS11-F''', '''MS11-H''' and '''MS11-J''' are the different configurations of [[Digital Equipment Corporation|DEC]]'s first commodity [[Metal Oxide Semiconductor|MOS]] [[UNIBUS]] [[main memory|memory]] card, the M7847.

Fully populated with 4Kx1 [[Dynamic RAM|DRAM]] [[integrated circuit|chips]], it is known as the MS11-J, and holds 32K [[byte]]s. The quarter-, half- and three-quarter-populated versions are the MS11-E, -F and -H, respectively; with 8KB, 16KB and 24KB. (The '-G' is almost certainly not part of the sequence since 'G' is not in the [[DEC alphabet]].)

There are [[parity]] versions of each; the -EP, -FP, -HP and -JP; these require an [[M7850 parity controller]] in the same [[Modified UNIBUS Device|MUD]] [[backplane]] as the memory card. The M7847 is a [[DEC card form factor|hex]] card, so it cannot go in the end slots of the backplane.

The access time is 550 nsec (1250 nsec maximum on [[refresh]] conflict), and the cycle time is 700 nsec (1400 nsec maximum on refresh conflict).

{{PDP-11}}

[[Category: UNIBUS memory]]

@@ Line 1: / Line 1: @@
-The '''MS11-E''', '''MS11-F''', '''MS11-H''' and '''MS11-J''' are the different configurations of [[Digital Equipment Corporation|DEC]]'s first commodity [[Metal Oxide Semiconductor|MOS]] [[UNIBUS]] [[main memory]] card, the '''M7847'''. They plug into a [[Modified UNIBUS Device|MUD]] [[backplane]] (only; not [[Small Peripheral Controller|SPC]]).
+The '''MS11-E''', '''MS11-F''', '''MS11-H''' and '''MS11-J''' are the different configurations of [[Digital Equipment Corporation|DEC]]'s first commodity [[Metal Oxide Semiconductor|MOS]] [[UNIBUS]] [[main memory]] card, the '''M7847'''. They plug into a [[Modified UNIBUS Device|MUD]] [[backplane]] (''only''; not [[Small Peripheral Controller|SPC]]).
 Fully populated with 4Kx1 [[Dynamic RAM|DRAM]] [[integrated circuit|chips]], it is known as the MS11-J, and holds 32K [[byte]]s. The quarter-, half- and three-quarter-populated versions are the MS11-E, -F and -H, respectively; with 8KB, 16KB and 24KB. (The '-G' is almost certainly not part of the sequence since 'G' is not in the [[DEC alphabet]].)
-There are [[parity]] versions of each; the '''MS11-EP''', '''-FP''', '''-HP''' and '''-JP'''; to have the parity operate, these require an [[M7850 parity controller]] in the same  backplane as the memory card. The M7847 is a [[DEC card form factor|hex]] card, so it cannot go in the end slots of the backplane.
+There are [[parity]] versions of each; the '''MS11-EP''', '''-FP''', '''-HP''' and '''-JP'''; to have the parity operate, these require an [[M7850 parity controller]] in the same backplane as the memory card. The M7847 is a [[DEC card form factor|hex]] card, so it cannot go in the end slots of the backplane.
-The [[access time]] is 550 nsec (1250 nsec maximum on [[refresh]] conflict), and the [[cycle time]] is 700 nsec (1400 nsec maximum on refresh conflict). Refresh cycle time is 25 μsec (typical), 22.5 μsec (minimum).
+The [[access time]] is 550 nsec (1250 nsec maximum on [[memory refresh]] conflict), and the [[cycle time]] is 700 nsec (1400 nsec maximum on refresh conflict). Refresh cycle time is 25 μsec (typical), 22.5 μsec (minimum).
 The board has provision to use battery backup power to retain data during a power outage. Configuration is by [[Dual Inline Package|DIP]] switches; the first DEC memory to do so.

@@ Line 1: / Line 1: @@
-The '''MS11-E''', '''MS11-F''', '''MS11-H''' and '''MS11-J''' are the different configurations of [[Digital Equipment Corporation|DEC]]'s first commodity [[Metal Oxide Semiconductor|MOS]] [[UNIBUS]] [[main memory|memory]] card, the M7847. They plug into a [[Modified UNIBUS Device|MUD]] [[backplane]] (only; not [[Small Peripheral Controller|SPC]]).
+The '''MS11-E''', '''MS11-F''', '''MS11-H''' and '''MS11-J''' are the different configurations of [[Digital Equipment Corporation|DEC]]'s first commodity [[Metal Oxide Semiconductor|MOS]] [[UNIBUS]] [[main memory]] card, the '''M7847'''. They plug into a [[Modified UNIBUS Device|MUD]] [[backplane]] (only; not [[Small Peripheral Controller|SPC]]).
 Fully populated with 4Kx1 [[Dynamic RAM|DRAM]] [[integrated circuit|chips]], it is known as the MS11-J, and holds 32K [[byte]]s. The quarter-, half- and three-quarter-populated versions are the MS11-E, -F and -H, respectively; with 8KB, 16KB and 24KB. (The '-G' is almost certainly not part of the sequence since 'G' is not in the [[DEC alphabet]].)
@@ Line 7: / Line 7: @@
 The [[access time]] is 550 nsec (1250 nsec maximum on [[refresh]] conflict), and the [[cycle time]] is 700 nsec (1400 nsec maximum on refresh conflict). Refresh cycle time is 25 μsec (typical), 22.5 μsec (minimum).
-The board has provision to use battery backup power to retain data during a power outage. Configuation is by [[Dual Inline Package|DIP]] switches; the first DEC memory to do so.
+The board has provision to use battery backup power to retain data during a power outage. Configuration is by [[Dual Inline Package|DIP]] switches; the first DEC memory to do so.
-{{PDP-11}}
+==External links==
 [[Category: UNIBUS Memories]]

@@ Line 5: / Line 5: @@
 There are [[parity]] versions of each; the '''MS11-EP''', '''-FP''', '''-HP''' and '''-JP'''; to have the parity operate, these require an [[M7850 parity controller]] in the same  backplane as the memory card. The M7847 is a [[DEC card form factor|hex]] card, so it cannot go in the end slots of the backplane.
-The access time is 550 nsec (1250 nsec maximum on [[refresh]] conflict), and the cycle time is 700 nsec (1400 nsec maximum on refresh conflict). Refresh cycle time is 25 μsec (typical), 22.5 μsec (minimum).
+The [[access time]] is 550 nsec (1250 nsec maximum on [[refresh]] conflict), and the [[cycle time]] is 700 nsec (1400 nsec maximum on refresh conflict). Refresh cycle time is 25 μsec (typical), 22.5 μsec (minimum).
 The board has provision to use battery backup power to retain data during a power outage. Configuation is by [[Dual Inline Package|DIP]] switches; the first DEC memory to do so.

@@ Line 3: / Line 3: @@
 Fully populated with 4Kx1 [[Dynamic RAM|DRAM]] [[integrated circuit|chips]], it is known as the MS11-J, and holds 32K [[byte]]s. The quarter-, half- and three-quarter-populated versions are the MS11-E, -F and -H, respectively; with 8KB, 16KB and 24KB. (The '-G' is almost certainly not part of the sequence since 'G' is not in the [[DEC alphabet]].)
-There are [[parity]] versions of each; the -EP, -FP, -HP and -JP; these require an [[M7850 parity controller]] in the same  backplane as the memory card. The M7847 is a [[DEC card form factor|hex]] card, so it cannot go in the end slots of the backplane.
+There are [[parity]] versions of each; the '''MS11-EP''', '''-FP''', '''-HP''' and '''-JP'''; to have the parity operate, these require an [[M7850 parity controller]] in the same  backplane as the memory card. The M7847 is a [[DEC card form factor|hex]] card, so it cannot go in the end slots of the backplane.
 The access time is 550 nsec (1250 nsec maximum on [[refresh]] conflict), and the cycle time is 700 nsec (1400 nsec maximum on refresh conflict). Refresh cycle time is 25 μsec (typical), 22.5 μsec (minimum).

← Older revision		Revision as of 01:58, 21 May 2018
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	{{PDP-11}}		{{PDP-11}}

−	[[Category: UNIBUS ~~memories~~]]	+	[[Category: UNIBUS Memories]]

← Older revision		Revision as of 01:57, 21 May 2018
Line 9:		Line 9:
	{{PDP-11}}		{{PDP-11}}

−	[[Category: UNIBUS ~~memory~~]]	+	[[Category: UNIBUS memories]]