Re: VECTOR: mathbox
Mark Shostak <[email protected]>
| Newsgroups | gmane.games.arcade.vector |
|---|---|
| Message-ID | <[email protected]> |
On Fri, Dec 10, 2004 at 01:24:35AM -0500, dorian wrote: > so in other words, even if the math box isn't working i should get a test > screen? Correct. btw, which game did you say this was? What are the symptoms again? (any sound in selftest?) Are the supply voltages correct? -Mark > > my problem is the address decoder isn't changing. there are 4 address lines > with suspect waveforms. > but the 6502 is good and the buffers i am convinced are good. the input pins > on the decoder chips don't seem to be shorted to ground or vcc. i don't see > anything shorting the address lines. i am getting continuity thru the > traces. i don't see what is causing the problem. > > --------------------------------------------------------------------------- > ** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org > ** Please direct other questions, comments, or problems to [email protected]