Caple C871i Manual do Utilizador descarregar pdf (Página 315)

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Apple II Computer Info

> (It is a more serious problem for the RAM-based SmartWatch, since pin 1

> is A14: the code accessing the SmartWatch must keep A14 high for the

> entire access cycle.)

> Assuming the reset signal doesn't interfere, neither of these bits would

> prevent software from accessing the SmartWatch registers. The worst

> effect should be a frozen or garbage time if the OSC bit was set to 1.

> It is possible that the "Time is Faulty" test is looking for known

> illegal values, and the SmartWatch time has been corrupted. If so, it

> should be a simple case of writing the correct time into it, and the

> driver should kick into life again.

> (While doing some Y2K tests on a SmartWatch, I discovered it was

> possible to write nominally illegal dates, e.g. digits greater than 9.

> This might be rejected by the No Slot Clock driver.)

> --

> David Empson

> [email protected]

> Snail mail: P O Box 27-103, Wellington, New Zealand

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### nsclock.resetpatch

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Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 315 of 572

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Caple C871i Manual do Utilizador Página 315

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Caple C871i Manual do Utilizador Página 315

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