Re: GSRAM Issues..

[Drew <goggledrew@gmail.com>]

On May 26, 7:51 pm, Drew <goggled...@gmail.com> wrote:
> Hi,
>
> I bought a couple of GSRAM boards to play with (mainly to allow me to
> play with a Ramkeeper and replace some Apple 1mb boards) and having
> some strange issues i am hoping someone can help out on :).
>
> The boards are GSRAM Rev D boards with GSC2A-Q and GSC1B-Q GAL chips,
> so not ROM03 compatible. They are being tested on a bare ROM01 booting
> from GS/OS 5.04 Floppy.
>
> Both boards seem to be new and have 256K of chips (so bank A filled)
> with 120ns DRAM. I installed some new ram to Banks B-D and the system
> just crashes out when booting GS/OS.  I removed everything but Bank A
> and the system boots GS/OS fine and passes the memory tests fine using
> megamemorytester. If i fill the board up to bank C it also boots fine.
> It only seems to be when there are chips in Bank D on both cards. The
> new DRAMs are 100ns instead of 120ns and even made sure all where
> matching but same problem. I even pulled DRAM from Apple 1MB cards and
> that also crashed, so don't think it is the DRAM that is the issue. I
> suspect dodgy GSRAM cards, but before I throw them out the window ;)
> does this ring a bell with anyone?
>
> I know Henry sells the GSEB GALs, but was surprised to have issues on
> a ROM01...
>
> Thanks :)
> Drew

Been playing a bit more and I fully populated one of the boards and
used a ramkeeper on a rom01 machine. Doing this made it work fine and
gsos and memory test passed quite happily. This makes me think it's a
gal issue and will go ahead and get a B gal from Henry ;)