Hi Hilary and All

On Mon, 9 Aug 1999, Hilary Cheng wrote:

> Hi,
> 
> John Morrison wrote:
> 
> > Hi All;
> >
> > I committed the bugfixes Thomas made to interp.cc, and I committed his
> > VGA driver.  (Thomas, I had a little trouble -- there were two copies of
> > the vga class -- I nuked the first one, and the second one seemed to
> > work.  Let me know if I picked the wrong one!)
> >
> > Per Thomas' direction, I added (and you will want to add) the following
> > lines to init.java:
> >
> 
> Hm, I have made some changed in VGA Drivers to test. I found that using Java
> to Fill Memory
> IS VERY SLOW. I have added a operation using C/ASM to fill memory with a
> value. Is that

I know, dont't know why, and another fact is that a write8 is faster than
a write32...

> good to have such a operation ? Also, when I want to fill whole screen with
> the same color using Java.
> It will hangs after a period of time. I guessed it would be a stack
> overflow. Any Idea about it ?

I have the same problem: running a long task is impossible. (I think it
was something with jbHeap())

> 
> Also, will Graphics Drivers are under JJOS Modules ?
> 
> >
> > jos.platform.driver.vga seton=new jos.platform.driver.vga();
> > seton.initvga();
> > seton.test();
> >
> > I rebuilt the arch/i386 target, and, Lo and Behold.... it DID something!
> >
> > If I saw correctly, it cleared the screen and made some falling
> > horizontal bars in multiple colors, and then left a little green
> > checkmark on the screen.  (Thomas, please tell me if this is the desired
> > behavior.  By the way, I especially like the little checkmark at the end
> > of the run!).
> >
> >
> 
> It is a correct behaivor. :p
> 
> Now, I am modifying Thomas Driver to be a generic graphics drivers.
> 
> Regards,
> 
> Hilary
> 
> PS: Thomas, anythings new in VGA Driver ? :p

No, I'm reading the ibm-javaos manual, how to structure device drivers
e.t.c. 
Could you send me your latest code? 


Thomas Bocek


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