[Cryptography] Secure erasure
Bill Frantz
frantz at pwpconsult.com
Wed Sep 21 17:30:54 EDT 2016
On 9/21/16 at 3:19 AM, leichter at lrw.com (Jerry Leichter) wrote:
>Going full old-fogie here: The manuals produced by the larger,
>better companies in those days were extraordinary. The
>Principles of Operation really did describe, in clear,
>well-written English, all the details of a 360. IBM language
>programming manuals were excellent, as were DEC's. There was a
>DEC RT-11 manual that I used to recommend to people as one the
>best operating system theory introductions out there. People
>would joke about taking up a whole orange (later gray) wall
>with VMS documentation - but everything was there, fairly easy
>to find, easy to read and understand.
>
>All this is gone, When the hardware costs millions, users are
>willing to pay hundreds for a set of manuals, and you can
>afford to pay technical writers to create and maintain that set
>to the highest standards. When the hardware costs hundreds, no
>one can afford to put in the effort. This was a phenomenon
>that first became noticeable (to me at least) in early MS/DOS
>days. I wanted to learn MS/DOS the way I'd learned many other
>OS's. But ... Microsoft didn't publish programming guides.
>Hell, you needed to know the BIOS calls, too - and no
>manufacturer published those
>either. Instead, outside writers developed books of varying quality, always somewhat out of date.
For a look at more modern systems: I got interested in the
Raspberry PI and bought a board to make a low power computer.
The PI is based on a Broadcom system =-on-chip designed for set
top boxes. Since I share Jerry's liking of manuals, I went the
the Broadcom web site to see what documentation was available
for the PI. Their answer was, "Click here to talk to a
salesman." I didn't bother.
When I wanted a bit more performance, I switched to a BeagleBone
Black board. That board uses a TI chip. I went to the TI web
site and was able to download a PDF manual for the chip -- all
4966 pages of it! It seems to be complete, with descriptions of
the CPU and all the integrated I/O gear (USB, HDMI, etc.) I
haven't delved into it deeply enough to determine if I could
program or build hardware based on the manual, but I can't
complain about too thin a manual. :-)
Cheers - Bill
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