Re: Apple II Memory Expansion Card

["Henry" <apl2research(.a.t.)comcast.net>]

Hey Guys.

Looking at my RAMFactor the 4 Pin connector is just power and Ground.  I'm 
just unsure of what voltage would be and didn't want to 'blow up' my card if 
I could help it.

Thanks to Sean for the 4 Meg Expansion board and the RAMCharger!  Looks like 
those two options will soon be making a come back.

I believe the RAMFactor must has some kind of refresh circuit on it.  It's 
the only thing that makes sense really.  Of the 4 pin connector I bet 2 pins 
are the charger and 2 are the battery.  That way if the power was to go out 
or you were to turn off the computer, power would never be interrupted to 
the card.  At least that's my assumption at this point.  The manual didn't 
have any information about it really.  Just talk about the jumpers.

I'm thinking a few NiMH batteries and a wall-wart for when the computer is 
off will do the trick.  I'm sure I can make the battery pack 'stackable' so 
people can choose how much time they want, although one pack should be good 
for days.  If you use the computer daily and have it charge when the powers 
on then you shouldn't need the wall wart.  If you leave the computer off for 
days then you will need the wall wart.  At least that's how I'll try and 
make it.  It will be more of a kit actually.  All the parts will be sold 
separately and you can choose what options you will want.  Of course I 
always prefer when all the options can fit inside the computer, so I'll try 
and make the battery internal.


-- 
Henry S. Courbis
www.GSE-Reactive.com
Apple II Series Legacy Hardware - Come take a look at what we have to offer!

"Steven N. Hirsch" <shirsch@adelphia.net> wrote in message 
YaqdnW4awf13fR3ZnZ2dnUVZ_v-dnZ2d@adelphia.com">news:YaqdnW4awf13fR3ZnZ2dnUVZ_v-dnZ2d@adelphia.com...
> Michael J. Mahon wrote:
>> Henry wrote:
>>> Hey Matt.
>>>
>>> RAMCharger!  That's it!  I was trying to remember what it was called.  I 
>>> had seen some RAMKeepers come up for sale on eBay but they were all for 
>>> IIgs boards and not the RAMFactor.
>>>
>>> I believe the only thing you need is to connect power to the board and 
>>> it's now a NVRAM disk.  NV as in Non-Volatile - incase someone didn't 
>>> know.
>>
>> So the board contains its own refresh clock?  (Which it would have to
>> switch to the Apple clock when operating, to avoid asynchronous messes.)
>
> I used to have a RamCharger, but sold it (like a fool) during the early 
> 90's.  In my defense, Apple 2 hardware was not worth much in those days.
>
> From what I can recall, there was nothing resembling a clock generator in 
> the external unit.
>
> Steve