[Coco] Transplanting 512K RAM expansion?

[Bob Devries]

Fedor, apart from removing the ram chips, the coco3 will still remain 
useable when you modify it for 512K. Removing the capacitors does not stop 
the coco3 from working as a 128K machine in any way.
--
Regards, Bob Devries, Dalby, Queensland, Australia

Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.

website: http://www.home.gil.com.au/~bdevasl
my blog: http://bdevries.invigorated.org/

----- Original Message ----- 
From: "Fedor Steeman" <petrander at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Thursday, May 25, 2006 4:24 AM
Subject: Re: [Coco] Transplanting 512K RAM expansion?


Thanks, Bob. I understand from what you are saying that one cannot perform a
512K transplant without rendering the source CoCo unusable, because the
original 128K RAM chips are removed as well as several capacitators.

My problem is that I have a very clean and beautiful Australian CoCo3 (for
PAL/240V and with 128K) and an old ugly and very dusty CoCo3 (for NTSC/240V
and with 512K) previously owned by a heavy smoker. What I want is a CoCo3
that is beautiful on the inside (for PAL/240V and with 512K) as well as on
the outside (rather like my wife, really).

However, I am not ready to sacrifice the old, ugly CoCo just yet, so I will
have to figure out something else. I will in any case need to keep both.

Cheers,

Fedor

On 24/05/06, Bob Devries <devries.bob at gmail.com> wrote:
>
> Fedor, it depends on whether the other coco3 has already been modified for
> 512K before. If it has, then yes, it is that easy. If not, you have to
> clip
> out some capacitors (C65 C66? IIRC). In any case, the original 4 memory
> chips must be removed if they are still there.
>
> Hope it helps.
> --
> Regards, Bob Devries, Dalby, Queensland, Australia
>
> Isaiah 50:4 The sovereign Lord has given me
> the capacity to be his spokesman,
> so that I know how to help the weary.
>
> website: http://www.home.gil.com.au/~bdevasl
> my blog: http://bdevries.invigorated.org/
>
> ----- Original Message -----
> From: "Fedor Steeman" <petrander at gmail.com>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Thursday, May 25, 2006 1:12 AM
> Subject: [Coco] Transplanting 512K RAM expansion?
>
>
> Hi,
>
> I want to transplant a 512K RAM expansion from one CoCo3 to another, but
> not
> being a hardware buff, I am a bit uncertain on how to proceed.
>
> The 512K RAM expansion seems to sit on top over the location of the
> original
> 128K RAM-blocks, so it seems an easy job of taking it out and putting it
> in
> the other CoCo over the 128K RAM-blocks. Is it really that simple? Or are
> there other measures I need to take?
>
> Cheers,
>
> Fedor
>
> --
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>
>
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>

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