Re: VECTOR: mathbox

CHANGE the RAM!!! at lest the 000-7fff ones

is the watchdog barking??


----- Original Message ----- 
From: "dorian" <[email protected]>
To: <[email protected]>
Sent: Friday, December 10, 2004 7:24 PM
Subject: Re: VECTOR: mathbox


> so in other words, even if the math box isn't working i should get a test
> screen?
>
> 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.
>
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