Path: news1.icaen!news.uiowa.edu!news.physics.uiowa.edu!hammer.uoregon.edu!logbridge.uoregon.edu!news.maxwell.syr.edu!newsfeed.cwix.com!portc03.blue.aol.com!audrey03.news.aol.com!not-for-mail From: supertimer@aol.com (Supertimer) Newsgroups: comp.sys.apple2 Subject: Re: No Slot Clock - Damaged? Lines: 55 NNTP-Posting-Host: ladder06.news.aol.com X-Admin: news@aol.com Date: 11 Oct 1999 03:20:21 GMT References: Organization: AOL http://www.aol.com Message-ID: <19991010232021.01045.00000604@ng-bk1.aol.com> Xref: news1.icaen comp.sys.apple2:153221 [[Mailed to Gus Vilomar and posted to csa2.]] "Gus Vilomar" wrote: >Is there a way to reset the clock other than the NSC software? The NSC >software is not letting me reset the clock - I keep on getting "No clock >found or faulty time". Is there a "reset button" on the chip? I doubt it >but it's worth asking. There is a possibility that the IC is locked up and the battery is not dead. I've been reading the NSC manual and according to it, the SmartWatch chip only draws power from the battery when the computer is powered down. Otherwise, it draws power from the computer. So even with a dead battery, the SmartWatch should work providing you leave the power on. The manual says: "The SmartWatch is a 28-pin, 600 mil wide DIP socket with a built in CMOS timekeeper function and an embeded lithium energy source to maintain time and date. It accepts any 28-pin bytewide ROM or volatile RAM. A key feature of the SmartWatch is that the timekeeper remains transparent to the memory device placed above. The SmartWatch monitors VCC (+5 volts) for an 'out of tolerance' condition. When such a condition occurs, an internal lithium energy source is automatically switched to prevent loss of clock data." So the SmartWatch only uses the battery when the power from the computer (VCC +5 volts) is absent. My guess is that the data in the chip has somehow become corrupted. As to how to reset the chip, the manual says this: "The SmartWatch information is contained in 8 registers of 8 bits each which are sequentially accessed one bit at a time after the 64 bit pattern recognition sequence has been completed...bits 4 and 5 of the day register are used to control the RESET and oscillator functions. Bit 4 controls the Reset (A14 - pin 1). When the reset bit is set to logical 1, the RESET input pin is ignored. When the RESET bit is set to logical 0, a low on the RESET pin will cause the SmartWatch to abort data transfer without changing data in the watch registers. Bit 5 controls the oscillator. This bit is shipped set to logical 1, which turns the oscillator off. When set to logical 0, the oscillator turns on and the watch becomes operational." Ok, maybe someone who understands the above can provide a clue on what to do to reset the SmartWatch. Since this is a battery powered device with a sealed battery, you can't just cut the power to reset it. ;-( Anyone have any ideas?