Difference between revisions of "MM11-L core memory"
(Some detail) |
m (Add ME11-L subtypes) |
||
| Line 1: | Line 1: | ||
| − | The '''MM11-L''' was a popular, and common, memory for the early [[PDP-11]] [[UNIBUS]] machines. An MM11-L was composed of a three board set: | + | The '''MM11-L''' was a popular, and common, [[core memory]] for the early [[PDP-11]] [[UNIBUS]] machines. An MM11-L was composed of a three board set: |
* G110 - hex-format memory control logic and data channels | * G110 - hex-format memory control logic and data channels | ||
| Line 8: | Line 8: | ||
M7259 - dual parity controller. | M7259 - dual parity controller. | ||
| − | The MM11-L required a custom backplane, although some CPU's (e.g. the [[PDP-11/05]]) had processor backplanes wired | + | The MM11-L required a custom backplane, although some CPU's (e.g. the [[PDP-11/05]]) had processor backplanes wired to hold an MM11-L set as well as the CPU. |
| − | The '''MM11-S''' was a four-slot backplane plus a single MM11-L board set. The '''MF11-L''' was a nine-slot backplane plus a single MM11-L board set; the backplane has room for two more MM11-L board sets. The '''ME11-L''' | + | The '''MM11-S''' was a four-slot backplane plus a single MM11-L board set. The '''MF11-L''' was a nine-slot backplane plus a single MM11-L board set; the backplane has room for two more MM11-L board sets. The '''ME11-L''' was an MF11-L in a 5-1/4" rack-mount box, with power supply (the -LA was wired for 115V supply, the -LB for 230V). |
Parity versions (with a 'P' suffix) were available for all of the above. | Parity versions (with a 'P' suffix) were available for all of the above. | ||
Revision as of 18:11, 21 February 2016
The MM11-L was a popular, and common, core memory for the early PDP-11 UNIBUS machines. An MM11-L was composed of a three board set:
- G110 - hex-format memory control logic and data channels
- G231 - hex-format memory driver logic
- H214 - quad-format core stack
There was also a parity variant, the MM11-LP, which added an M7259 - dual parity controller.
The MM11-L required a custom backplane, although some CPU's (e.g. the PDP-11/05) had processor backplanes wired to hold an MM11-L set as well as the CPU.
The MM11-S was a four-slot backplane plus a single MM11-L board set. The MF11-L was a nine-slot backplane plus a single MM11-L board set; the backplane has room for two more MM11-L board sets. The ME11-L was an MF11-L in a 5-1/4" rack-mount box, with power supply (the -LA was wired for 115V supply, the -LB for 230V).
Parity versions (with a 'P' suffix) were available for all of the above.
