Re: An actual Apple Question

[Tim Aaronson <taaronson@NoSpam.com>]

> Tim Aaronson <taaronson@NoSpam.com> wrote in message
> 397D2A35.D4DBF51E@NoSpam.com">news:397D2A35.D4DBF51E@NoSpam.com...
> > On my IIgs I note two banks of RAM on the motherboard,  a four chip set
> > labeled "Standard Ram" and another four chip set labeled  "Fast Ram".
> > Both are composed of 4464 chips.
> >
> > What are the function of these two groupings; why the peculiar names
> > 'fast' and 'standard'; how are they memory mapped vis a vis the
> > expansion card?
> >
> Paul Grammens wrote:
> That doesn't seem to be in the faq. Perhaps that's in the History section, I
> know I've seen it explained. The History has a lot of detail on the hardware
> as it evolved, despite the title. I just tried to look it up, but the site
> is not responding. The link is on the bottom of the second section of the
> faq. Try the last part of the history, it probably has the IIgs info:
>
> ftp://ground.ecn.uiowa.edu/apple2/Faqs/R020V5HIST.DOC
>
>

I found this in the FAQ History
7. RAM:
The 1986 model has 256K built-in to the motherboard.
The 1989 "ROM 3" revision has 1.125MB built into
memory.The Apple IIGS is expandable to 8MB of RAM
with the right memory card.Many applications, such
as Apple Computer's HyperCard program for the GS (GS
version of the famous Macintosh program) need at
least 2MB.Extra RAM goes into a special memory
expansion slot on the motherboard.Both Alltech
Electronic (http://www.allelec.com ) and Sequential Systems
(http://www.sequential.com ) are selling 8MB memory cards
as of October 1998.



Matt(hew) Jenkins wrote:

> The standard ram is actually slow ram; intentionally clocked at the same
> speed as the //e to provide identical instruction timing in Normal speed
> mode. The fast ram runs at //gs native speed. There's 128k of each,
> except for the ROM03 which has a meg of it.
>

Is the total 256k 'useable' at the same time or does the hardware lock out one
bank depending on the emulation/native mode status?