TECH: Millipede board problems

Archived from groups: rec.games.video.arcade.collecting (More info?)

I have a couple of millipede boards here. Both have a small problem. On
one, it is missing the firing sound. All other sounds appear to be there.
On the other one, there are a couple of lines through the DDT's. Whats
weird is that I can't get either of the boards to get into test mode. I
switched it to test mode, and I just get some colored screens that change
colors every time I push the fire button.

Archived from groups: rec.games.video.arcade.collecting (More info?)

Millipede has two test mode options.
The typical one which displays the settings, text characters, inputs,
etc. Pressing buttons in this mode will change the background,
foreground colors etc as well as make beeps and you can move the
trackball.

The other testmode (probably not documented) is if one
of your coin inputs is held active when entering testmode
it will display the blank (colored) screen with a bunch of
large solid rectangles of various shades of similar colors.
Pressing the coin input again and it will show a screen
full of dots. If you are seeing this, one of your coin inputs
might be stuck active.

All sounds are generated by the pokeys. So my guess is
you are missing all the sounds that are generated by
that particular pokey, not just the fire sound.
Swap around pokeys and you can probably narrow down
which one is bad. As well, once you can get into
the normal testmode, it will do a pokey random number
generator test. Failed Pokeys are indicated by P0 or
P1 being displayed.

I have some other information on my Multipede trouble
shooting page. Including sample screen shots of what
test mode looks like.
http://www.brasington.org/arcade/cm/trouble.shtml

Archived from groups: rec.games.video.arcade.collecting (More info?)

Thanks everyone for the info. The missing fire sound was a bad pokey. And
you are correct, I am getting the "undocumented" test mode. Pusing the coin
input shows a screen full of dots.


"braze" <braze.rgvac@gmail.com> wrote in message
news:1126893829.833233.45360@z14g2000cwz.googlegroups.com...
> Millipede has two test mode options.
> The typical one which displays the settings, text characters, inputs,
> etc. Pressing buttons in this mode will change the background,
> foreground colors etc as well as make beeps and you can move the
> trackball.
>
> The other testmode (probably not documented) is if one
> of your coin inputs is held active when entering testmode
> it will display the blank (colored) screen with a bunch of
> large solid rectangles of various shades of similar colors.
> Pressing the coin input again and it will show a screen
> full of dots. If you are seeing this, one of your coin inputs
> might be stuck active.
>
> All sounds are generated by the pokeys. So my guess is
> you are missing all the sounds that are generated by
> that particular pokey, not just the fire sound.
> Swap around pokeys and you can probably narrow down
> which one is bad. As well, once you can get into
> the normal testmode, it will do a pokey random number
> generator test. Failed Pokeys are indicated by P0 or
> P1 being displayed.
>
> I have some other information on my Multipede trouble
> shooting page. Including sample screen shots of what
> test mode looks like.
> http://www.brasington.org/arcade/cm/trouble.shtml
>