TTDPatch Error in DOS

Thanks for the advice!
The lowmemory switch did allow it to run and connect for two player
game.
I know that this switch will limit the use of some features such as
new graphics. Is this due to the limits set by the switch or does it
still use up the resources it can find? I just wonder if it will have
a big effect on performanceof the game.

Hunter



On Sun, 10 Feb 2008 23:58:29 -0000, "Owen Rudge" <nntp.DeleteThis@owenrudge.net>
wrote:

>> Greetings,
>> I have installed the latest version of TTDPatch to run on an Intel
>> Celeron 500mhz computer with msdos 6.22. I use these (I have 2) to
>> play two player with my son. We use the original game with no problem
>> but when I try to use TTDPatch it fails to load stating:
>
>Do earlier versions of TTDPatch work (eg, 2.0 rev 1)? What if you enable the
>"lowmemory" switch
>(http://wiki.ttdpatch.net/tiki-index.php?page=LowMemoryVersion)?
 >> Stay informed about: TTDPatch Error in DOS 

> I know that this switch will limit the use of some features such as
> new graphics. Is this due to the limits set by the switch or does it
> still use up the resources it can find? I just wonder if it will have
> a big effect on performanceof the game.

I'm not sure exactly how lowmemory goes about keeping memory usage down,
although according to the wiki it does this mainly by restricting the
vehicle factor and new graphics. I'm not sure if it'd have much of an effect
on performance, it probably just won't let you use too many custom features.

Regards,

--
Owen Rudge
http://www.owenrudge.net/
 >> Stay informed about: TTDPatch Error in DOS 

H H Jones wrote:
> Thanks for the advice!
> The lowmemory switch did allow it to run and connect for two player
> game.
> I know that this switch will limit the use of some features such as
> new graphics. Is this due to the limits set by the switch or does it
> still use up the resources it can find? I just wonder if it will have
> a big effect on performanceof the game.

The switch has two effects:

1. It prevents you from loading any game saved with a larger vehicle
array (in other words, the 'morevehicles' switch must be set the same or
higher as it was when the game was saved -- otherwise you get a "Game
load failed" message; normally you would probably get a warning). This
is the primary source of memory savings, since normally TTDPatch
reserves memory for the largest array possible (more than 4 MB).

2. The cache for the ordinary TTD sprites is set to 800 KB instead of
the usual 4 MB. This may mean more frequent disk accesses, which in
turn *may* affect the performance -- but frankly, I doubt you'll notice
it much, unless you have a really slow hard disk.

Note, however, that new graphics are loaded separately, and add to the
memory usage anyway (but on the positive side, they don't require disk
access during the game). Thus, you may get out of memory again if you
add many new graphics sets to newgrf.cfg.

BTW, I've checked the latest sources; the behaviour of the switch hasn't
changed since 2.0.
--
Marcin Grzegorczyk
 >> Stay informed about: TTDPatch Error in DOS 

Thanks to all for the help and advice!

Hunter


On Mon, 11 Feb 2008 22:37:07 +0100, Marcin Grzegorczyk
<mgrzegor RemoveThis @poczta.onet.pl> wrote:

>The switch has two effects:
>
>1. It prevents you from loading any game saved with a larger vehicle
>array (in other words, the 'morevehicles' switch must be set the same or
>higher as it was when the game was saved -- otherwise you get a "Game
>load failed" message; normally you would probably get a warning). This
>is the primary source of memory savings, since normally TTDPatch
>reserves memory for the largest array possible (more than 4 MB).
>
>2. The cache for the ordinary TTD sprites is set to 800 KB instead of
>the usual 4 MB. This may mean more frequent disk accesses, which in
>turn *may* affect the performance -- but frankly, I doubt you'll notice
>it much, unless you have a really slow hard disk.
>
>Note, however, that new graphics are loaded separately, and add to the
>memory usage anyway (but on the positive side, they don't require disk
>access during the game). Thus, you may get out of memory again if you
>add many new graphics sets to newgrf.cfg.
>
>BTW, I've checked the latest sources; the behaviour of the switch hasn't
>changed since 2.0.
 >> Stay informed about: TTDPatch Error in DOS