21574Re: [midatlanticretro] Found some Core Memory
- Jun 2, 2011I would expect anything from IBM to say I B M on it somewhere. In those
days, IBM made everything themselves, so another company name would
indicate this is from somewhere else.
On 6/2/2011 1:42 PM, Dave McGuire wrote:
> On 6/2/11 12:59 PM, Dan Roganti wrote:
> > when I took a closer look, it does appear to be a raw core plane - is
> > 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.
> They are probably (chips full of) selection diodes for the X/Y array.
> 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)
> Dave McGuire
> Port Charlotte, FL
- << Previous post in topic Next post in topic >>