emulatorII-list

Welcome!

If you mean the board in the lower right corner, it's the piggypack
RAM of earlier models. As you only have RS-232 I suppose that's what
you have. As memory was expensive in these days, the first models had
64k RAM chips instead of 256k. To have 512kB total, it was neccessry
to have more space for more chips.

Greetings,
Hoschi

--- In emulatorII-list@yahoogroups.com, "wintermute0815"
<wintermute0815@...> wrote:
>
> Hi,
> 
> I'm new to this group and I just bought a damaged EII on ebay.
> I managed to fix it by cleaning the head of the 5.25" floppy with q-
> tips and ethyl alcohol. Everything works fine now and I can work with 
> the EII. What a great machine!
>  
> But I still have some(maybe) newbie questions.
> While opening the EII for cleaning I discovered the "memory option 
> board". I wonder what it does. Is it a RAM expansion to 1MB? And if so 
> how do I access the second bank?
> 
> The main issue I have is that my EII only provides the RS232 interface.
> Since I want to connect the EII to a Mac I need to fix that.
> Does anyone out there have a PCB layout for modding the EII to accept 
> RS422? A scan (top and buttom) of the adapter board would also be great!
> It seems to be a very simple circuitry and I think its easy to built.
> 
> Thanks in advance!
> 
> wintermute
>