4004 and IC history / was Re: Vintage computer photogallery

Rod Smallwood RodSmallwood at mail.ediconsulting.co.uk
Mon Oct 15 20:07:28 CDT 2007

I'm sure I saw a development system at DEC for the 4004 running on a PDP-8 circa 1975.

Rod Smallwood 

-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Roy J. Tellason
Sent: 13 October 2007 19:41
To: cctalk at classiccmp.org
Subject: Re: 4004 and IC history / was Re: Vintage computer photogallery

On Saturday 13 October 2007 05:13, Brent Hilpert wrote:
> Can't remember where I read it, but it seemed plausible for the time 
> the
> 4004 was being developed (1970), also that it was compounded by 
> management's perceptions that the 4004 was a little business on the 
> side and not willing to invest much in it, memory chips still being the focus.
> On the other hand, I wonder what packages the original Busicom designs 
> utilised - that Intel would otherwise have been obligated to produce - 
> one would expect, or typically, they would be larger. (The 4040 would 
> go to a larger package, of course.)

Having heard of the 4004 of course,  I know basically nothing about it.  
Except that it's the part that was supposed to have started all this...   And 
the 4040?  I've only seen mention of it now and then.

> Perhaps not speed as an issue but you were wired into the small family 
> of chips that understood the highly specific machine/bus cycle, at 
> least until the 4008/9 came along that broke out the address/data busses.

4008/9?  First I've heard of these at all.

Can you give any sort of a general overview of what those parts were all about?

I remember very little about the 8008,  it having appeared in that Radio-Electronics article way back when.

I do remember,  even after the 8080 article in Popular Electronics came out, not thinking very much of microprocessors for quite a while.  They seemed limited,  it appeared that you had to really go through a lot to fit your thinking and way of doing things to what they could handle,  and it took me quite a while before I got to the point where I got a really good grip on the tradeoffs involved,  like low package count,  etc.  :-)

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