SD is alot cheaper to make than CF. SD is one bit at a time while CF is 8
bits at a time.
If they both use the same clock which do you think is faster.
cheers
DS
On Fri, 2 May 2014 20:49:36 -0400 dmccunney <dennis.mccun...@gmail.com>
writes:
> On Fri, May 2, 2014 at 7:53 PM, Dale E Sterner <sunbeam...@juno.com>
> wrote:
>
> > SD flash is a serial device similiar to rs232 but compact flash
> has the
> > same interface as an ide hard drive.Pin for pin they are the same.
> SD chips
> > are very slow but cf are fast.
>
> If you look at comparative benchmarks, I think you'll discover that
> SD
> is faster overall than CF. And in any case, the CF format seems
> largely deprecated these days. Pretty much everything now is SD.
>
> (And on bigger systems, note that IDE is going away, replaced by
> SATA,
> which is also a serial interface, SATA drives are *faster* than
> IDE.)
>
> > I used idecheck to clock a travelstar hard drive it was 7 mbs
> while a
> > Sandisk extreme iv clocked at
> > 14 mbs. Then you add that there are zero head seeks and you get a
> nice
> > speed boost.
> > syscheck.exe reported a through put at over 2 gigs per sec.
>
> Use what pleases you. My point was that the drive *media* was all
> NAND flash, regardless of what form factor the drive used. The
> particular flash media and the controller will have more to do with
> the speed than whether it's CF, SD, or SSD.
>
> > Now why doesn't display work for vga.
>
> The topic arose here before, with someone else having a similar
> problem.
>
> Eric Auer's response was
> "Not sure if this helps, but DISPLAY CON=(EGA,,1) should be
> sufficient
> for all your needs. For the font support,EGA is pretty much the same
> as VGA and display only is for loading custom fonts. If you do not
> plan to load a non-BIOS font, you do not even need display at all.
> The
> documentation of an older version says that VGA did set a certain
> number of font sizes, while EGA autodetected which font sizes exist
> (usually 8x8, 14 and 16 pixels).
>
> Looking at the source, EGA meant autodetect, EGA 8 did mean one
> font,
> LCD the same, EGA 14 two fonts, VGA did mean three fonts and only
> CGA
> meant different hardware.
>
> Note that newer VGA BIOS may miss 8x14 built-in fonts, but you can
> load a custom DOS font instead. There also are tools doing ONLY
> that,
> using less RAM than DISPLAY."
>
> Bottom line, just use DISPLAY CON=(EGA,,1), and you should be good
> to go.
>
> > DS.
> ______
> Dennis
> https://plus.google.com/u/0/105128793974319004519
>
>
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******************************************************>>>>
>From Dale Sterner - MS organic chemistry
http://pubs.acs.org/doi/abs/10.1021/jo00975a052
*******************************************************>>>>
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