[comp.sys.m6809] Coco 2 Memory Expansion

cccph@jessica.cs.ucla.edu (Charles Hobbs) (05/25/91)

Another question. I have what I believe is a 16 K Coco 2.
(Print MEM = about 16 K, minus graphics pages, etc. )

I've heard that this can be expanded to 32 or 64 K.
How does one go about doing this?

Thanks in advance....
____________________________________________________________________
|Charles P. Hobbs           | BBC micro, Aquarius and Spectravideo
|cccph@jessica.cad.ucla.edu | users! Please email me! Thanks!
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downsj@jacobs.CS.ORST.EDU (jason downs -- vasudeva) (05/25/91)

In article <2878@lee.SEAS.UCLA.EDU>,
	cccph@jessica.cs.ucla.edu (Charles Hobbs) writes:
>I've heard that this can be expanded to 32 or 64 K.
>How does one go about doing this?

hmm, how about going down to your nearest shack and buying a coco 3 for $99?
if you want memory, it comes with 128k. not to mention high resolution graphics
and an eighty column text screen.

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cccph@jessica.cs.ucla.edu (Charles Hobbs) (05/30/91)

In article <1991May25.162917.15902@lynx.CS.ORST.EDU> downsj@jacobs.CS.ORST.EDU (jason downs -- vasudeva) writes:
>In article <2878@lee.SEAS.UCLA.EDU>,
>	cccph@jessica.cs.ucla.edu (Charles Hobbs) writes:
>>I've heard that this can be expanded to 32 or 64 K.
>>How does one go about doing this?
>
>hmm, how about going down to your nearest shack and buying a coco 3 for $99?
>if you want memory, it comes with 128k. not to mention high resolution graphics

Eventually, I might buy a Coco 3, but for right now, I really need to
expand and use the Coco 2 that I have.

There were articles dealing with adding 32K to Cocos by stacking 
two 16 K chips upon one another, then connecting a certain pin to 
the SAM.

Of course, if the Coco 2 can accept 64K chips directly, that would be
a better route than all of that soldering.

Thanks in advance....
____________________________________________________________________
|Charles P. Hobbs           | BBC micro, Aquarius and Spectravideo
|cccph@jessica.cad.ucla.edu | users! Please email me! Thanks!
|Ham radio: N6YMK           | L.A. Blue Line Freq: 471.3375 mHz

wilker@gauss.math.purdue.edu (Clarence Wilkerson) (05/30/91)

There were different models of the coco II. The later ones (white??)
used 5v only ram chips that could be replaced by 64k ram chips
and a change of a jumper. You might try the Princeton listserver
for back issues of the net traffic for the coco. This was somewhat
hotter 4 years ago than now.

Clarence Wilkerson

cccph@jessica.cs.ucla.edu (Charles Hobbs) (06/05/91)

In article <12946@mentor.cc.purdue.edu> wilker@gauss.math.purdue.edu.UUCP (Clarence Wilkerson) writes:
>There were different models of the coco II. The later ones (white??)
>used 5v only ram chips that could be replaced by 64k ram chips
>and a change of a jumper. You might try the Princeton listserver
>for back issues of the net traffic for the coco. This was somewhat

How do I access the Princeton Server?

Thanks....

____________________________________________________________________
|Charles P. Hobbs           | BBC micro, Aquarius and Spectravideo
|cccph@jessica.cad.ucla.edu | users! Please email me! Thanks!
|Ham radio: N6YMK           | L.A. Blue Line Freq: 471.3375 mHz