Re: Mistery exponsion

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Sun, 26 Mar 2017 18:47:28 +0200 Message-ID: <1991f9a4-8246-5f01-db79-67b62b548a36@laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 03/26/2017 05:49 PM, Michał Pleban wrote:
> Hello!
>
> Ullrich von Bassewitz wrote:
>
>> 64K dynamic RAM + socket with 40 pins. Maybe coprocessor or graphics card?
>
> For a graphics card, it lacks video output and a graphics chip.
>
> On the other hand, there is really lots of TTL chips, looks like way too
> much for a simple memory expansion. But maybe there are for RAM refresh?

Looks to me like DRAM controller/refresh and access logic since you 
can't just made 64KB RAM visible in the address space of the host.

  Gerrit

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