Re: GS-RAM III ROM Replacement?

[pitz <pitz.wong@gmail.com>]

Thanks Henry!

Mental note: Always ask Henry for this kind of stuff (I thought about
it before originally posting to the newsgroup).

I'll be placing an order, but I'll first look into my stash of cards
to see if there are other ROMs/GALs I want upgraded.  I will
definitely order a few of those ZIP DRAMs too.

/Peter


On May 6, 3:57 pm, "Henry S. Courbis" <apl2research(a.t.)comcast.net>
wrote:
> Hello pitz.
>
> >I recently acquired a GS-RAM III memory card that turned out to be non-
> > working.  I tried swapping chips with another known working GS-RAM III
> > card and isolated the problem to the chip labeled GSR3A.I, leftmost
> > from the pictures at:
> >http://www.downloads.reactivemicro.com/Public/Apple%20II%20Items/Hard...
> > Is this a ROM chip for the memory card?  If so, is it easy to obtain a
> > dump from my working GS-RAM III and program another ROM to be used as
> > a replacement?
>
> It's not actually a ROM, but a GAL.  It's a type of programmable logic chip.
>
> The GAL is actually easily replaced.  They still produce new blanks that can
> be purchased for around $4 USD here in the States.  I just happen to have
> the JEDEC file (programming data file) if you need it.  It's also on the Web
> Server here:http://www.downloads.reactivemicro.com/Public/Apple%20II%20Items/ROM_....
> Of course you'll need either a Programmer that can program GALs or someone
> who has a Programmer that can program GALs.  You'll then also need the GAL
> which I believe is a GAL16V8.  Any speed will work.
>
> I just happen to be able to sell you a GAL and program it for you too if
> needed.  You can order one online if needed from our Store.  Just order this
> itemhttp://www.reactivemicro.com/product_info.php?products_id=59and leave
> comments at check out that I should program the GAL for your GS-RAM III.
> Most orders ship the next day so you should have it within a week in most
> cases.
>
> Hope that helps.
>
> PS - Good find with the memory card too!
>
> --
> Henry S. Courbiswww.ReactiveMicro.com
> Legacy Hardware and Support - Come take a look at what we have to offer!