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"Targets" (Announce)

posted by Tom E-mail, 29.09.2007, 23:26

> ANYONE who doubts this can run their OWN file copy/compare tests using
> FreeDOS, then again with ANY other DOS kernel now in use!
> No need to take my word, or Lucho's word --
I don't doubt that.

However it would be nice to include some details here like
what is average file size
what is the directory depth
what program(s) are used to copy/compare
etc.

to make comparisons more meaningful. details matter

> so they can SEE for themselves that FreeDOS really DOES rank "Dead LAST"
> in speed!!
quite possible, but the only free DOS available, so there's not much choice ;)

> And how FOOLISH it also is, that FreeDOS "eats" ALL available HMA space
> as its disk caching buffers, leaving NOTHING for UDMA's binary-search
> tables
It's intended to
allocate as much HMA space for buffers (as told by config.sys)
(and yes, in case a cache driver is present buffers=5 is probably fine)
allocate the rest for buffers as well, until someone else asks for it (that's the way I designed it)

BUT: there is indeed a problem here.
AFAIR this doesn't work during config.sys processing, as Freedos goes to HMA, initializes buffers etc. only after all device='s have been processed.

(re-)using HMA buffers should be fine when UDMA is loaded by devload UDMA.SYS (or by running a hypothetical UDMA.EXE)


B) I tested UDMA/UDVD 9-23-07 on a NFORCE4 motherboard, with S-ATA disk, and S-ATA DVD; both work 'as advertised'
disk with ~60 MB/sec
DVD with ~11 MB/sec

thanks, great work again

c) 2 minor 'buglets':
if UDMA is loaded twice (may happen if playing with config files), it just loads a second time. maybe better to just abort with 'already loaded'

AFAIK all XMS managers register a device name 'XMSXXXX0'

with XMGR, the following test fails
if exist XMSXXXX0 goto _xmsok
echo.
echo AUTOEXEC: No XMS manager installed, can't init RAMDISK
goto _abort

last and least, when UDMA and UDVD are loaded, the list of IDE adapters
is shown twice.
would be nice if the latter could be suppressed (reduce verbosity)

nothing of that a big deal, of course.

Anyway, thanks for the drivers, and thanks for adding S-ATA support.

tom

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