Re: Trying my hand at centipede

NMI is tied high. I have noticed that it sometimes takes a reset to get the
test mode to come up, it kinda acts like the start up reset is not working.

Kevin

On Sun, May 27, 2012 at 9:40 AM, Rodger Boots <rlboots2@gmail.com> wrote:

> Did you look at the microprocessor interrupt pin?
> On May 27, 2012 1:40 AM, "Kevin Moore" <talon.k@gmail.com> wrote:
>
>> I've got a Centipede that just won't play.
>>
>> You can get it to show the highscore table, and a field of mushrooms.
>>
>> No attract screen runs.
>> test mode does not indicate any errors.
>>
>> Can input coins but can't use p1 or p2
>>
>> So far
>> Voltages good
>> Rom tests good.
>> Long Ram test good. 0000-07FF
>> I did go through signature analysis since it was on the schematics, those
>> check good.
>>
>> Replaced CPU and Pokey jic.
>>
>> Clocks appear good.
>>
>> This board was running, it had sync problems which were repaired, worked
>> for a few months.
>>
>> :(
>>
>> Kevin
>>
>>

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Sun May 27 11:21:09 2012