Question about ZyXEL U-1496B

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> designed for 28 pin EPROMs. However, a modification has been made such
> that 32 pin sockets and 27C010-150DC EPROMS are in those sockets.

possible.

> My question for any person on this list is two fold. Is this modification
> the way ZyXEL intended things? Secondly, should I use 27C010-150s for the

it's not the way _ZYXEL_ intended it but it is true that this modification
is used to support the 27C010. It was an old trick to upgrade the thing.
it adds afew lines to support the address line(s) required to support the
bigger chips.

> upgrade or should they be faster?

It's known that it's sometimes a bit critical for the type of eproms used. I
have tms 27c010-10 -- note that I am not sure if 150 nS also fits. It also
could be the cause of your problems.

I recall that the + version requires somewhat faster eproms compared to the
normal version. the latest version is available at ftp.zyxel.co.at and is
6.18 or 6.19 or so.


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