[Coco] Memory Map

[Fedor Steeman]

Hi Louis,

I am working on one here:
http://www.cocopedia.com/wiki/index.php/Color_Computer_2_Memory_Map

Any input or contributions from others appreciated! :-)

Cheers,
Fedor



On 7 May 2013 19:55, Louis Ciotti <lciotti1 at gmail.com> wrote:

> Where can I get a memory map of the CoCo?
>
> In my initial attempt at assembly programing I first used Disk EDTASM in
> XRoar, and programed the example in the Disk EDTASM manual and it produced
> a checker board pattern on the screen like the manual said it should.  I
> then tried using lwasm, and as09 and it did not work.  I tracked the
> problem to the "ORG $1200" statement.  If I remove that line the
> program runs in XRoar as it should if assembled with lwasm, but not as09.
>
> Here is the program (Hopefully this looks ok, need a monospaced font):
>
>        org     $1200
> begin  jmp     start
>        fdb     done-begin
> start  lda     #$f9
>        ldx     #$400
> screen sta     ,x+
>        cmpx    #$600
>        bne     screen
> wait   jsr     [$a000]
>        beq     wait
>        clr     $71
>        jmp     [$fffe]
> done   equ     *
>        end
>
> The Disk TASM manual states that $1200 is used as the starting address
> because the "DOS" program for Disk EDTASM occupies from $0600 - $11FF.  Now
> if I use lwasm I of course do not have DOS in memory so $0600-$11FF is
> empty.
>
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