It's time to restore the 11/45 - progress!

Tothwolf tothwolf at
Sat Feb 7 00:58:32 CST 2015

On Fri, 6 Feb 2015, tony duell wrote:

>> OK, please forgive my ignorance, here.  To give you some idea of my 
>> electronics expertise level, I'd like you to know that I just googled 
>> crowbar :D
> I do not want this to be taken the wrong way. I am not trying to insult 
> you, nor do I want to put you off restoring the 11/45 (which is a very 
> nice machine).
> FWIW, the 11/45 was the first PDP11 I ever restored and the first I ever 
> used. All I had was the printset (schematics and fortunately microcode 
> flowcharts). No technical or maintenance manual. No instruction set 
> listing. No web pages to look at. No bitsavers. No list like this one. I 
> managed it, and you can too.
> But the 11/45 is complicated, both in terms of the number of components 
> and way it was designed. There are quite a few non-obvious (at least to 
> me) bits of logic circuitry in there.
> I think you need to read some more general books on electronics too. I 
> am not sure what to recomend here (and of course suggestions are 
> welcome). I do like 'The Art of Electronics' by Horrowitz and Hill, it 
> does start from a basic level, but it may be rather heavy going at the 
> start. It's still a book to consider (and probably buy), since you won't 
> grow out of it. But there may be other inttoductory books to look at.

The two introductory books I tend to recommend are 'Getting Started in 
Electronics' and 'The Forrest Mims Engineer's Notebook', both by Forrest 
M. Mims III.

Back in the day, earlier versions of these books were sold in Radio Shack 
stores. 'Getting Started in Electronics' was a bright green book. The 
first 'Engineers Notebook' was blue, followed by a yellow 'Engineers 
Notebook II'. The two Engineers Notebook books were discontinued much 
earlier than 'Getting Started in Electronics', which I remember seeing in 
their stores even into the late 1990s.

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