Gateway 386/33 User Manual page 130

9-34 Gateway 2000 Computer System User's Guide
Given the different ways people use AutoCAD, the only
way to determine the amount of memory you need for
SpeedCAD DLD is by trial and error. Once youare using
the driver, ifitruns out of room for the display list, itstops
using the list, at which point zooms, pans, and redraws
occur at normal AutoCAD speed. The following mes-
sage appears in the AutoCAD scroll area to notify you
that the display list has run out of memory:
Display List Overflow
If you see this message frequently, you need to increase
the amount of memory set aside for the driver, disable
the fast redraw list, and/or enable disk overflow. There is
no separate message for the fast redraw list, but losing it
does not have as drastic an effect on performance as
losing the display list. Largenumbers of ERASEs, MOVEs,
and ROTATESs can also increase the display list size, so
you may want to occasionally use the DLDCLEAN
command to keep your lists fresh, and thereforesmaller.
You may want to use the DLDUSAGE command de-
scribed in the previous section to keep tabs on your
display list usage as time goes on.
Also, your system may not have enough memory to
manage large drawings without excessive paging and
simultaneously support the display list and the fast redraw
list. This may happen because SpeedCAD DLD makes
AutoCAD runso much faster that you start to work with
larger drawings. After a certain amount of time spent
adjusting memory parameters, the only way to do your
work at top speed is to buy more memory. We recom-
mend that this be in the form of expanded memory,
which runs as much as 20 to 30% faster than extended
memory.
Allowing SpeedCAD DLD to use Expanded memory
increases your REDRAW, PAN, and ZOOM perfor-
mance by as much as 40% over using extended memory
directly. This is because extended memory can only be