Re: Timemaster H.O.

["William Garber" <willy46pa@garberstreet.com>]

"Michael J. Mahon" <mjmahon@aol.com> wrote in message ZuGdnfSiX5dgvf_YnZ2dnUVZ_tWdnZ2d@comcast.com">news:ZuGdnfSiX5dgvf_YnZ2dnUVZ_tWdnZ2d@comcast.com...
: William Garber wrote:
: > "Michael J. Mahon" <mjmahon@aol.com> wrote in message ofOdnRXaZJMUc_zYnZ2dnUVZ_sadnZ2d@comcast.com">news:ofOdnRXaZJMUc_zYnZ2dnUVZ_sadnZ2d@comcast.com...
: > : Robert Boucher wrote:
: > : >>What *are* the specs on the replacement batteries?  (They should be 3.6v
: > : >>and about 60-200mAh.)
: > : >
: > : >
: > : > Specs are 3.6v and 50 mAh
: > : >
: > : >
: > : >>As I mentioned, the battery should be irrelevant when the card is
: > : >>installed and the computer is on.  Can you set the clock under these
: > : >>conditions?  (If the clock has not been set since it was powered off,
: > : >>it may not be running, which might be detected as "No Device connected"
: > : >>by the clock software.)
: > : >
: > : >
: > : > How do I set the clock if the computer can't see it? I tried running the
: > : > BASIC program from both the original disk and the Timemaster owner's
: > : > manual. Nothing is happening.
: > :
: > : The card has ROM on it, which is probably read to detect the card's
: > : signature.
: > :
: > : If the computer can't see the ROM, then something quite unrelated
: > : to the battery is wrong.  I expect the ROM is wired directly to
: > : the address and data pins, so only the select logic and the ROM
: > : itself can be the problem.
: > :
: > : You might try reading the ROM by plugging it into a slot and
: > : using the monitor to L)ist some of the $Csxx space.  If it looks
: > : like random video data, then the ROM is not driving the bus.
: > :
: > : *Something* must have happened to this card, since the parts we
: > : are talking about are not usual failures.  Any chance of an
: > : ESD zap while replacing the battery?
: >
: >
: > I have an AE Serial Pro that I am trying to reconsititute.
: > The Card is detected, and the clock can be set to a date
: > and time, but it refuses to run. I've replaced the crystal,
: > tested the Trim Cap (works), and the Zener diode so far.
: > Nothing still. If I had more info, schematic, etc.....,
: > then I might see which components are involved in the clock
: > circuit. Otherwise, the only other thing I can do is to
: > replace all of the discrete components, and then check the
: > TTL on the whole card one by one until it functions.
:
: If the clock won't run after setting,
: it sounds like the clock chip.

None of the chips is defined as a clock chip.

: Does the "set" program require a keypress
: to start the clock at a precise time?

Yes, it does.

William Garber
Email Address - willy46pa@garberstreet.com
Alt. Email - willy46pa@comcast.net
Web address - http://www.garberstreet.com