Re: How to free CPU time?

Re: How to free CPU time?

[Stas Sergeev]

Hello.

Alain wrote:
> What is the best method to release cpu usage inside dosemu?
int 28h is known to be the most generic
way of doing this, unrelated to dosemu.
int 2fh/ax=1680h works well too.

> The problem is: I have made a program that runs in a loop checking 
> keyboard, mouse, network, etc.. It cannot call bios read key function 
> and lock there.
But it surely can (and should) call the
bios function to check the available
keystroke: int 16h/ah=1, and it will
release the CPU time too.

> If I do HLT, will it restart 
> after "interrupt"
Yes, but AFAIK dosemu won't release the
CPU cycles on hlt. Its use is not recommended.

> PS: I still have the problem below
Not reproduceable.

reinstalling

[Alain]

Hi Stas,

>> what I did: I had an rpm version 1.3.1, updated to an rpm 1.3.2, updated
>> to cvs with "make; makeinstall"
> 
> I have no idea where you got an 1.3.2

Zoltan Boszormenyi released a rpm for FC3 in 22-may-2005

> rpm (perhaps an unofficial one), and
> yet less I understand how it is possible
> to update an rpm version to cvs with
> "make install" etc.

The other way around. "make install" afer compiling the CVS version ;-)

How should I do to 100% uninstall?
> 
> Hmm, "rpm -e dosemu"? "make install"
> above the other "make install" should
> work too.

Done, it made no difference. (it took some time because I lost all 
FreeDOS binaries)

I believe that this was caused by the latest "cursr at 1/3 heigh" fix. I 
wouls like to have a look at the code, it would be easyer to test it 
here it it works fine in your BC31.

Can you help me find my way to the diff that made it? I am not familiar 
enough with cvs to find it :(

thanks,

Alain

More info on Cursor problem

[Alain]

I just found how to get my cursor back, I believe this can help to 
figure out the problem:

if I use comand line option "-v 3" cursor disapears inside BC. (but I 
can get 43 lines)

If I use nothing or "-v 18" cursor is ok, BUT the IDE switches to 50 
lines (was set to 43 just before)

This would be just fine, exept the I need 43 lines to fit my screen. I 
found very few CP850 fonts, I am using one that is 8x14 and this is too 
big. If I could find one of 8x12 or 8x13, but I could't fint it.

thanks,
Alain

Cursor problem: Debugging

[Alain]

Hi Stas,

I just started some debuging of dosemu's internals. Here is what I found:

In CVS, src/base/bios/int10.c,
function: boolean set_video_mode(int mode)
line 636 (2 before the end) there is a:
     set_text_scanlines(400);

Why is it there? (it is not there in the stable release)

If I remove thet line, I fix this problem I reported:
-----
If I use nothing or "-v 18" cursor is ok, BUT the IDE switches to 50 
lines (was set to 43 just before)
-----

This is one way to fix the cursor problem... Please tell me if I may be 
breaking something.

thanks,
Alain