21571Re: [midatlanticretro] Found some Core Memory
- Jun 2, 2011On 6/2/11 12:59 PM, Dan Roganti wrote:
> when I took a closer look, it does appear to be a raw core plane - isThey are probably (chips full of) selection diodes for the X/Y array.
> that PG-rated ;)
> As there's no support logic on there that you typically see in a memory
> controller circuit. Other than what appears to be some kind of buffer or
> level translator chips sparsely located on the edges of the core and
> routed to the backplane card edge connectors.
See DEC-8E-HR1C-D_8eMaint_Feb73.pdf pp.3-75 to 3/78 for a description
of how that works, and a few pages before that for schematics. (only
using PDP-8 as an example because it's well-documented)
Port Charlotte, FL
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