On 10 Mar 2006, at 17:38, Robert Riebisch wrote:
> [EMAIL PROTECTED] wrote:
>
> > No, FreeDOS does not hook the timer interrupt. FreeDOS calls
> > INT10h, ah = 0 to get the tick counter. BIOS is providing the
>
> I doubt, because that's 'SET VIDEO MODE'. ;-)
arrrgh! your are right. INT1Ah should
[EMAIL PROTECTED] wrote:
> No, FreeDOS does not hook the timer interrupt. FreeDOS calls
> INT10h, ah = 0 to get the tick counter. BIOS is providing the
I doubt, because that's 'SET VIDEO MODE'. ;-)
Robert Riebisch
--
BTTR Software
http://www.bttr-software.de/
-
Hi!
10-Мар-2006 10:57 [EMAIL PROTECTED] (Miguel) wrote to
freedos-devel@lists.sourceforge.net:
>> M> It seems to me that FreeDOS must hook into the BIOS ticker interrupt in
>> M> order to get notification of ticks.
>> Why it should get notifications?!
M> I assumed that it wanted notification
>> It seems to me that FreeDOS must hook into the BIOS ticker interrupt in
>> order to get notification of ticks. Probably 1Ch ... but that is not
>> happening in this code ... so that makes me wonder whether or not there
>> is
>> someplace else in the FreeDOS code that is hooking the timer interru
> M> I see that interrupt vectors up through 3F are modified.
>
> Just for safety - for example, if some program will try to call mouse
> API (INT33) while mouse driver not installed.
Understood
>>> M> For example, the timer ticker interrupt at 1Ch (or 08h).
>>> For timer operation DOS
Hi!
10-Мар-2006 10:22 [EMAIL PROTECTED] (Miguel) wrote to
freedos-devel@lists.sourceforge.net:
>> for (i = 0x23; i <= 0x3f; i++)
>> setvec(i, empty_handler);
>> Here you may see, which FreeDOS hooks for own handlers and which
>> initializes to empty handler (which just IRETs).
M> I see that
On 10 Mar 2006, at 10:22, Miguel wrote:
>
> > M> For example, the timer ticker interrupt at 1Ch (or 08h).
> >
> > For timer operation DOS uses BIOS.
>
> One can read the timer tick out of the BIOS Data Area, but in order to get
> interrupt notification of timer ticks one must hook int 1Ch (
Arkady V.Belousov wrote:
> Hi!
Thank you for your quick response
[snip]
> /* all of these are in the DOS DS */
> { 0x0, FP_OFF(int0_handler) }, /* zero divide */
[snip]
> for (i = 0x23; i <= 0x3f; i++)
> setvec(i, empty_handler);
[snip]
Excellent!
> Here you may see, which F
Hi!
10-Мар-2006 07:49 [EMAIL PROTECTED] (Miguel) wrote to
freedos-devel@lists.sourceforge.net:
M> I am looking through the FreeDOS source, but someone might know the
M> answers ...
M> Q: Which interrupt vectors are hooked by FreeDOS?
main.c:
__O\_/_\_
All,
I am working on booting extensions for pxelinux + memdisk with FreeDOS ...
I am looking through the FreeDOS source, but someone might know the
answers ...
Q: Which interrupt vectors are hooked by FreeDOS? For example, the timer
ticker interrupt at 1Ch (or 08h).
Q: What is the highest numbe
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