Re: Using 1 Megabit chips on the IIgs Memory Expansion Card?

[dog_cow@macgui.com (D Finnigan)]

Bill Garber wrote:
> "Michael Black" <et472@ncf.ca> wrote in message
> Pine.LNX.4.64.1203312122300.11594@darkstar.example.net">news:Pine.LNX.4.64.1203312122300.11594@darkstar.example.net... 
>> On Sat, 31 Mar 2012, D Finnigan wrote: 
>> 
>>> The Technical Introduction to the IIgs manual states that the 
>>> memory expansion card for the IIgs should be able to support 
>>> up to 4 MB of RAM when 1 megabit chips become available. 
>>>
>>> I've never heard of anyone putting 4 MB on this card without 
>>> modifying it.   Is what the Apple manual says true? 
>> 
>> I don't know.  When I filled up my IIGS memory card with 
>> extra 256K RAM, I certainly wondered about doing that. 
>> I can't remember, though, if it just popped into my mind, 
>> or if I saw something concrete to make it within easy 
>> reach. 
>> 
>> It might have even just been that there's so little on 
>> the card other than the RAM. 
>> 
>>   Michael 
> 
> Many of them have the first 256K hard-soldered onto the 
> card, so, if it is possible, which I don't think it is, 
> you'd first need to desolder the first 8 chips. I'm 
> looking at one now that has the first 8 soldered in. 

Ugh.... That's so obvious, but I hadn't thought of it.

Yes, all of the chips have to be of the same capacity.

.. Which explains why no one has ever made 4 MB on an unmodified IIgs
Memory Expansion Card.

-- 
]DF$
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