Mailstation memory map (Nov 13, 2006)

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  1. From: "Neil Morrison" Nov 13, 2006
  2. From: "Cyrano Jones" Nov 14, 2006


Subject: Mailstation memory map

From: "bradfayette" <bfayette@...>

Nov 13, 2006

Am I correct in assuming that I have 16K of ram available to use
starting a=
t 0x4000? I would like to expand on the scancode program and
maybe try to g=
et forth running.

Regards,

Brad


1: Subject: Re: [mailstation] Mailstation memory map

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From: "Neil Morrison" <neilsmorr@...>

Nov 13, 2006

charset="iso-8859-1"

It appears there is at least one page of memory available.

Neil

Original Message -----
From: bradfayette

Am I correct in assuming t=
hat I have 16K of ram available to use
starting at 0x4000? I would like t=
o expand on the scancode program and
maybe try to get forth running.

R=
egards,

Brad
.

charset="iso-8859-1"

w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
content -->

ze=3D2></FONT> </DIV>
one page of memory
available.</FONT></DIV>
sp;</DIV>
 </DIV>
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ARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
s=
tyle=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:<=
/B>
dfayette</A>
orrect in assuming that I have 16K of ram available to
use<BR>starting a=
t 0x4000? I would like to expand on the scancode program
and<BR>maybe tr=
y to get forth running.<BR><BR>Regards,<BR><BR>Brad<!-- |**|end egp html ba=
nner|**| --></P></DIV></DIV><!-- ygrp-msg --><!-- Sponsor -->
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height=
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src=3D"(URL)
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/nc3=3D3"
width=3D1> <BR><SPAN style=3D"COLOR: white"></SPAN> <!--End gr=
oup email --></BLOCKQUOTE></BODY></HTML>



2: Subject: Re: Mailstation memory map

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From: "Cyrano Jones" <cyranojones_lalp@...>

Nov 14, 2006

have 16K of ram available to use
and on the scancode program and

Yes. Wh=
en mbug starts, it banks page #01 of RAM
into slot4000, so unless you chang=
e it, it should
still be there.

Mbug does not use this for anything itse=
lf, it just
puts it there as a convenience.

The mailstation divides the =
64 kByte z80 address space
into four 16 KByte regions, which I have been c=
alling
slot0000, slot4000, slot8000, and slotC000.

The pages of ram, code=
flash, and dataflash are also
16 KBytes. The mailstation has 128 KBytes of=
ram,
ram pg #00 thru ram pg #07.

Slot0000 is always codeflash pg #00, and=
slotC000 is
always ram pg #00

Mailbug command "6" will display the curren=
t inhabitants
of slot4000 and slot8000, the two "bankable slots".

CJ
=