Re: retro crypto

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On Wed, Jan 8, 2020 at 5:00 PM John Denker via cryptography <
[email protected]> wrote:
...

>
> By EPROM I mean something like a 27c1001:
>   https://www.nteinc.com/specs/27C/pdf/nte27c1001.pdf
> It is organized as 128k of 8-bit bytes.  You can easily
> program all the bits yourself, so the manufacturer does
> not know.  It has 17 bits of address.  The cost is a
> few bucks per chip.
>

Oh, John, that's not 70s technology! The densest EPROM available in 1979
was the 2732, and it was NMOS, not CMOS :)
(yes,I checked with my Intel data book :) )

Also: xkcd.com/386

Cheers,

/ji

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote">=
<div dir=3D"ltr" class=3D"gmail_attr">On Wed, Jan 8, 2020 at 5:00 PM John D=
enker via cryptography &lt;<a href=3D"mailto:[email protected]">cry=
[email protected]</a>&gt; wrote:<br></div><div>...=C2=A0</div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px=
 solid rgb(204,204,204);padding-left:1ex">
<br>
By EPROM I mean something like a 27c1001:<br>
=C2=A0 <a href=3D"https://www.nteinc.com/specs/27C/pdf/nte27c1001.pdf" rel=
=3D"noreferrer" target=3D"_blank">https://www.nteinc.com/specs/27C/pdf/nte2=
7c1001.pdf</a><br>
It is organized as 128k of 8-bit bytes.=C2=A0 You can easily<br>
program all the bits yourself, so the manufacturer does<br>
not know.=C2=A0 It has 17 bits of address.=C2=A0 The cost is a<br>
few bucks per chip.<br></blockquote><div><br></div><div>Oh, John, that&#39;=
s not 70s technology! The densest EPROM available in 1979 was the 2732, and=
 it was NMOS, not CMOS :)</div><div>(yes,I checked with my Intel data book =
:) )</div><div><br></div><div>Also: <a href=3D"http://xkcd.com/386">xkcd.co=
m/386</a><br></div><div><br></div><div>Cheers,</div><div><br></div><div>/ji=
</div><div><br></div><div>=C2=A0</div></div></div>

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