From mboxrd@z Thu Jan  1 00:00:00 1970
From: lehmann@ans-netz.de (Oliver Lehmann)
Date: Mon, 09 Nov 2015 09:16:46 +0100
Subject: [TUHS] System III - TCP/IP
In-Reply-To: <20151109091551.Horde.vyfPFb7gspsxIQB3WGNcE_A@avocado.salatschuessel.net>
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Message-ID: <20151109091646.Horde.WJOBgOU20u5J3ItIHNJDwO9@avocado.salatschuessel.net>

I hit the send button to fast :(

Oliver Lehmann <lehmann at ans-netz.de> wrote:

> Nick Downing <downing.nick at gmail.com> wrote:
>
>> You can most likely implement a split I/D architecture by having code
>> execute out of a different segment than data, although I haven't
>> checked the datasheet so I don't know for sure if this is possible.
>
> I have 3 different MMUs available. Stack, Code and Data it is called in
> the Circuit diagram. I probably have to lookup the references but I still
> don't get why the kernel can only work with 64k of RAM as it is right now
> compiled as a segmented programm and uses more memory already with SysIII.
> Only the boot0-loader is compiled unsegmented and also some small
> utilities. Every other portion of the system uses the segmentation features
> of the Z8001 and is not limited to 64k adressable space.
>
> The system has right now MB of

The system has right now around 6 MB of RAM but can be upgraded to 16MB
minus 64KB (Due to a firmware bug) of RAM.