Re: 8032-SK/3016

From: Adrian Vickers (
Date: 2001-08-20 20:28:24

At 08:17 pm 19/08/2001 -0500, Raymond C. Bryan wrote:

>A couple things if you have a volt meter test the power supplie 
>voltages  then see that the cpu has a "clock" pulse (on the 6502 is 
>that on pin2 like the 6510?, look this up) a voltmeter should show 
>about 2.5 volts on the clock pin (50% duty cycle of 5 V).

Good idea. I'm getting 2.1v from CLK0 (pin 37), 0.95v from CLK2 (pin 39)
and 0.75v from CLK1 (pin 3).

>Next if you have a working 8032 putting a dead chip in that will not 
>fry the working unit, but that will tell you that have a working or 
>dead chip (cpu, rom,via).  Second the RAM is also a possible problem 
>- but probably not socketed. Or you could have faulty logic ics 
>74lsxx again not socketed.

I shall try the 6502 in my working machine (I've not checked that yet), but
I'm starting to suspect the CRT controller, as it's the warmest chip of
them all after a few minutes powered up.

B-Racing: B where it's at :-)

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