4K MM15 PDP-15

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Multi-board core memory module by DEC, probably MM15 for PDP-15

Sales price: 60,00 €
Price / kg:
In stock: 3
mm15_TB8A3645
mm15_TB8A3654
mm15_TB8A3655
mm15_TB8A3656
mm15_TB8A3657
mm15_TB8A3658
mm15_TB8A3659
mm15_TB8A3660
mm15_TB8A3661
Description

This is a core memory module made by DEC.

Components:
1x 3D core matrix
1x Dioden matrix G613
1x Dioden matrix G614
5x G100 Sense Amplifier and Inhibit drivers

Manufactured in 1970, according to date stamp on 74xx TTL ICs.

Printed labels: "Type=NSO, Assembly No=911134A91, Rev=E, Ser No = 20496"

Condition:
Looks very good, no mechanical damages to see. The module is a "working plug", but was in stock for 25 - 30 years.
Therefore no function is guaranteed, sold as "defect".


Probably this is the core memory module "MM15" from the PDP-15.
MM15 consists of 4096 18-bit words.
For docs see
bitsavers/dec/pdp15/DEC-15-H2BB-D_PDP-15_EngrDrwsVol2_Dec70.pdf, pdf page 140
and
DEC-15-H2BB-D_MaintManVol1.pdf, page 26

Other driver flip-chips (G222, G223) are available too, but not part of this offer.