Re: MORE Questions?!?!?!

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <23432RNDQVMWEMHQFEC@ods.sol.net>,  <dreamer@ods.sol.net> wrote:
> 
> Ok, here's the scenario.  I've got a //e with a 4MHz Zip Chip and an SMT
> No-Slot-Clock, as well as various cards.  I'd like to switch to the
> Platinum //e but have encountered a couple of problems that Apple wasn't
> able to resolve for me.
> 
> 1) The Plat. //e uses a slightly different processor - the 65SC02 to be
> exact.  I do not know if replacing this with the Zip will cause any
> problems in the machine.

Don't worry - the 65SC02 is just the name used by a different CPU
manufacturer (probably GTE or WDC) for the 65C02.  The ZIP will work fine.

> 2) The Plat. //e, instead of having both a CD & EF ROM chip, has one
> chip called the CF ROM chip.  The clock chip fits in the CD socket in
> the regular //e, and if I put it in the CF ROM socket (the CD or CF ROM
> chip is piggybacked to the clock chip) programs like ProTerm, GBBS and
> ProSel still recognize it, however I am unable to use the SMT NSC Utils
> to adjust the time/date on it.  It says "Faulty/no clock found".

Possibly a bug in the utilities.  I can't see any specific reason for
the chip not to be writable in the platinum IIe, unless it is due to
something like interrupts (which should be disabled by the clock driver
and write software) or extra ROM select cycles.  Unfortunately, I don't
have the latest version of the IIe Technical Reference (which describes
the platinum IIe) so I can't check the socket configuration.  Nothing
looks obvious from a quick check of the Dallas DS1216E data sheet or
the pinouts of the 2764 and 27128 EPROMs.

Does the NSC work under either of the CD or EF ROMs in the older IIe,
or does it only work under the EF ROM?
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand