[Coco] A hint for NitrOS-9, MPI, and "hard drive" PAK

[Bill Pierce]

Gene, I hope that's not the DAT board removal of the 2meg..... That board's directly soldered to the CPU as you well know. Hairy stuff for sure. If it's the memory board then no problem.
I only have the 1meg upgrade but I know they're similar in installation, just different circuitry.

On another note, I wonder if it's possible to modify the 1meg board to a 2meg board? I would love to convert mine to 2 meg :-)

Bill Pierce
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-----Original Message-----
From: Gene Heskett <gheskett at wdtv.com>
To: coco <coco at maltedmedia.com>
Sent: Thu, Dec 19, 2013 11:38 am
Subject: Re: [Coco] A hint for NitrOS-9, MPI, and "hard drive" PAK

They will enlarge, and the detail is good, nice scan. An SC77527 failure is 
entirely possible.  I wonder if the shack (or Mark) has any spares? I'd 
imagine I'd better put a heat sink on the replacement, and in a socket too.  
I am only seeing 5 volts or nearly ground at the 4 pin din, which I think 
confirms the diagnosis.

My 2 meg memory kit covers that whole area, so that will need to go in 
order to make other measurements. Like verifying that the +-12 is actually 
getting to the salt chip.  Should be an interesting replacement. Not.

Thanks Luis.