[Coco] CoCo 2 16k.. Upgrade or no?

[Arthur Flexser]

The ?mem command gives the amount of memory between the start of
program memory and the top of available memory--the amount of memory
Basic programs have to work with.  In a 16K CoCo without Disk Basic,
and with the default PCLEAR 4 in effect, program memory starts at
$1E01 (or $2601 with Disk Basic).  Basic reserves 200 bytes of string
space at startup, at the top of memory.  So in a 16K CoCo without Disk
Basic, available memory is $4000 - $1E01 - 200, which comes out to
8503, 16 bytes higher than the observed figure of 8487.  (The 16 bytes
are probably reserved for stack space.)  Add 16,384 (16K) to that, and
you get what ?MEM should give in a 32K/64K CoCo.

Art

On Tue, Mar 13, 2012 at 8:35 PM,  <haywire666 at aol.com> wrote:
> Thats interesting I don't remember the ?mem thing...
>
>
> Can someone provide a list of the #'s and what they mean?
>
>
> 8487 means 16k?
>
>
> I got 24871 on the coco2 I have on at the moment, does that mean it only has 48k?
>
>
> Steven
>
>
>
> -----Original Message-----
> From: Chad H <chadbh74 at hotmail.com>
> To: 'CoCoList for Color Computer Enthusiasts' <coco at maltedmedia.com>
> Sent: Tue, Mar 13, 2012 8:31 pm
> Subject: [Coco] CoCo 2 16k.. Upgrade or no?
>
>
> Was just given a virgin CoCo2 26-3136.. It's apparently 16k, only shows 8487
> from "?MEM".  I already have a spare 64k CoCo, don't really need this one.
> I will probably put it up for sell.  Question though.would it be better to
> leave it as is or perform a 64K upgrade to it?  I already have enough spare
> RAM IC's and sockets and it already has ECB 1.1.
>
>
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