The H-222A ferrite core memory unit with capacity of 16K x 18 bits is
originally from PDP-11 computer made by DEC.
size of the
memory unit is 397 x 220 x 15 mm and consists from two boards. The
first board (on top) is controll unit with Unibus interface. The second
board (bottom) contains the ferrite plane memory.
The core plane:
top view of the bottom board. The ferrite plane is protected with a
ferrite core plane. It is splitted into 36 blocks. Each block has 32
photo solder side of the ferrite core plane. It is bottom side of the
detail view to
block's corner of the ferrite core plane. The wire has 0.08 mm
diammeter and the black knots are repairs of the broken wires.
view to repairs of the broken wires
Le texte et les photos
sont de 'Jiri
'. Publiés avec
l'autorisation de l'auteur.
Voir son site www.computyerasylum.co.uk
subi un léger traitement: dimension, anti-flou, perspective...)
The text and 8 published
from 'Jiri Picka
With his kind permission.
Have a look to his website www.computyerasylum.co.uk
suffered a slight anti-blur, dimension)
you can take/publish every photos from my WEB site.
Only give there a link to www.computerasylum.co.uk
as original source.