From: fachat (afachat_at_gmx.de)
Date: 2004-12-27 21:30:23
Hi,
There are two staring points I can think of:
disassemble (or use the disassembed versions of)
the PET4 ROMs to find the use of the "bell".
Maybe track down the output of the bell character
from $FFD2.
The one is to read the source of my GeckOS operating
system where I have similar routines to "ring the bell".
http://www.6502.org/users/andre/osa/index.html, d/l
the "oa-2.0.0.tar.gz" archive look into arch/pet/32k/devices
in the file kbd_pet.a65.
Andre
On Mon, Dec 27, 2004 at 02:06:39PM -0700, Rich wrote:
> Hi,
>
> I recently acquired an 8032 and I'm looking for some code to drive the
> peizo speaker with the VIA chip. Does anyone have a good starting
> point? From what I've been able to determine you use the shift
> register functionality on the VIA to drive the piezo speaker. I'm
> guessing that you'd have a periodic interrupt routine to change the
> shift register data/control in order to play the melody. Am I on the
> right track?
>
> Thanks!
> --
> "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
> <http://www.xmission.com/~legalize/book/>
> Pilgrimage: Utah's annual demoparty
> <http://pilgrimage.scene.org>
>
> Message was sent through the cbm-hackers mailing list
>
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.