Fw: Deck of IBM PLAYING CARDS GOES FOR $325

[Allison]

>
>Subject: Re: Fw: Deck of IBM PLAYING CARDS GOES FOR $325
>   From: "Chuck Guzis" <cclist at sydex.com>
>   Date: Sun, 18 Dec 2005 00:22:58 -0800
>     To: cctalk at classiccmp.org
>
>On 12/17/2005 at 10:37 PM woodelf wrote:
>
>sites.
>>I  downloaded some motorola application notes from bitsavers.
>>Wow they sure had a  lot of  different types of  TTL. I wonder how only 
>>the 74xx became the only TTL used today?
>
>I think the short answer is "second sources"--you had at least 4 big
>players, TI, National, Moto and Fairchild all producing 7400-series logic.
>Some of the earlier TTL (Moto 400/500-series) had mid-line (pins 4 and10)
>power supplies, which turned out to be not as convienient for PCB layout.
>And, although it's largely forgotten, 7400 TTL shares a fair number of
>pinouts with the older DTL circuits.
>
>By the time LSTTL was out, everyone had pretty much standardized on the
>74xx line.
>

I can still find 74h, 74F, 74S, 74hct, 74c, 74hc nevermining what I 
have on hand.

It was interesting, useful and a PAIN.  It sometimes made a huge differnce
if you subbed a S04 where there was an LS04.

Allison