[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [N8VEM: 13942] Re: Fwd: Text to speech demo .....

Thanks Sergey .

To adapt the program to other ports or other hardware are 5 addresses to be changed, they should all point to the same port.
 Disassembling  the program from address 0000h:

14CCh ,15C0h,15C7h,1608h,160Eh . 

14cb d3XX      out     (XXh),a
15bf  d3XX      out     (XXh),a
15c6 d3XX      out     (XXh),a
1607 d3XX      out     (XXh),a
160d d3XX      out     (XXh),a

In this case XX is 61h (port B from 8255 )

Initial message from 16B2h to 16C4h (I am a computer).


Best regards.

Sergio.






2012/6/22 Sergey <skis...@gmail.com>
Hi Sergio,

Somehow I missed this post. That's a cool application!

It reminded me of early 90's when I built a couple of similar circuits
for IBM PC's parallel port - a poor man audio adapter known as Covox.

Port B of 8255 PPI is not used on the upcoming Parallel Port Propeller
board, that would be a neat use of this port. The board has some
prototyping space too :-)

Thanks,
Sergey

On Jun 18, 7:05 pm, Sergio Gimenez <zetao...@gmail.com> wrote:
> Hello, I have a computer with a text to speech utility.
>
> I tried this utility working  in zeta board. Uses 8-bit parallel port of
> 8255 (PB 61h address).
>
> The only circuit to be added is a digital to analog converter using
> resistors and one amplifier, LM386 or TDA820M works perfectly.
>
> Program set8255 <http://set8255.com> resets the PPI all ports to output
> mode , but in zeta is not necessary .
>
> The program works best with a 3,5 to 4 MHZ CPU XTAL.
>
> Sorry for the bad video quality.
>
> Regards.
>
> Sergio.
>
> http://www.youtube.com/watch?v=qrD5VaLjsyk
>
>  P6190133.JPG
> 405KViewDownload
>
>  P6190132.JPG
> 421KViewDownload
>
>  P6190131.JPG
> 435KViewDownload
>
>  SPEECH.rar
> 136KViewDownload

--
You received this message because you are subscribed to the Google Groups "N8VEM" group.
To post to this group, send email to n8...@googlegroups.com.
To unsubscribe from this group, send email to n8vem+un...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/n8vem?hl=en.