Re: IIe sound output

[noone@nowhere.net]

If the cassette out is line level then you could easily rewrite programs 
without source code by doing a search for the speaker address and 
changing it to the cassette address using a sector editor.  Search for 
$30 c0 (the speaker memory address in lo-high order) and change the $30 
to a $20.  This works quite well for a lot of games according to many 
things I've read.  Someone should check the circuit diagram and see how 
well the impedence, current and voltage would do to drive a line level 
input.

Warning, your mileage may vary:

Years ago, I took the speaker on my II+ and put a volume control in 
series and a small stereo speaker jack appropriately wired.  Sorry I do 
not know the ohm rating of the volume.  I experimented with parts I had 
handy and picked the one that gave the the best range from maximum to 
practically muted.  It never fully muted.

Connections:
*  +5 to one end of volume
*  middle volume (wiper) to tip of Headphone jack.
*  Headphone switch of the jack to Speaker.
*  'other tip' of headphone jack to the other side of the speaker. (so 
the sound would go through stereo headphones with a stereo plug)
*  No connection on the common jack connector or the other end of the 
volume control.

I distinctly recall using that speaker jack to hook into a boombox and 
it worked, although the volume level was never very high and the 
distortion and noise were in abundance.

This circuit was transplantable and I loaned it to a friend's with a IIe 
for a week or so before permanently mounting it in my II+.

Now that I know a bit more about electronics, I realize a capacitor 
would have helped quite a bit to decouple the currents and smoothed a 
lot of the noise.  I also realize that I could have blown up the aux 
circuit in my boombox.

Thankx,
Ed

Mike Pfaiffer wrote:
> Simon Williams wrote:
> > Anyone tinkered with replacing the IIe's crappy speaker with a line out?
>
>     For programs where the source was available I used to change the 
> output from the speaker to the casette out. This I safely sent to my 
> guitar amp and stereo.