M7891 switch settings? (unibus)

From: Gooijen H <GOOI_at_oce.nl>
Date: Fri Jan 23 01:14:56 2004

Correct. MM is for core, MS is for chips.
I was too lazy to check what I was writing.
I even have MM11-LP (96 kWords) in my 11/35.

I passed the morse code exam last December, and since
I had to choose a new call, the postfix PDP seemed a
nice one. "PDP" in morse code is not the best choice,
but I just could not resist. I am not active on HF,
waiting until Spring to install a antenna (aerial).

nice weekend all,

- Henk


> -----Original Message-----
> From: Frank Arnold [mailto:fm.arnold_at_gmx.net]
> Sent: donderdag 22 januari 2004 20:10
> To: cctech_at_classiccmp.org
> Subject: RE: M7891 switch settings? (unibus)
>
>
> >From: Gooijen H <GOOI_at_oce.nl>
> >Subject: RE: M7891 switch settings? (unibus)
> >
> >I have scanned 11/34 field maintenance print sets.
> >They are at http://www.mainecoon.com/classiccmp/
> >And if I am not mistaken the MOS memory is there too.
> >AFAIK is MS11 correct, just the suffix letter makes
> >all the difference (core, 11/44 MOS, etc.)
>
> MS11-xx is alway semiconductor memory of different capacities
> and speed as specified by the last two caracters
> (to the best of my knowledge...)
>
> MM11-xx are the true core memories with the ferrite cores.
> (Wanna see a MM11-YP, 32k x 18 core-stack? Then bump the
> cofee-machine)
>
> several years after Mos memory became available people were
> still talking about core if they just meant the mainstorage
> or R/W-Memory, regardless of the technology it was built with.
>
> >
> > gd luck,
> >- Henk, PA8PDP
> ^^^
> Heh heh, on what frequency is it radiating?
> Do you remember the little proggys that would make a pdp
> produce sound on an AM-receiver not tuned to any station?
>
> >> -----Original Message-----
> >> From: Brad Parker [mailto:brad_at_heeltoe.com]
> >> Sent: donderdag 22 januari 2004 1:18
> >> To: arcarlini_at_iee.org; General Discussion: On-Topic and
> >> Off-Topic Posts
> >> Subject: Re: M7891 switch settings? (unibus)
> >>
> >>
> >> "Antonio Carlini" wrote:
> >> >> Does anyone have a manual for an M7891 (128kx18 MOS memory)?
> >> >
> >> >Is that an MS11 of some sort?
>
> if it is 128kx18, then it is a MS11-LD, and has an integrated parity
> controller. I should have the maintenancemanual somwhere if
> it of use to
> anyone. I will sent a free copy to aomeone who likes to
> convert it to .pdf
> file to be put on-line. (Will have to dig it from the garage, however)
>
> Frank
Received on Fri Jan 23 2004 - 01:14:56 GMT

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