ken@hpclkms.cup.hp.com (Ken Sumrall) (01/23/91)
I recently tried to add a clock chip to my Apple /// and I can't seem to get it to work. I bought the 58167 chip, inserted it in the socket on the motherboard, and hooked up 4.5 volts to the battery connections on the motherboard. However, the clock doesn't seem to respond to the system. Do I need to do anything else to get the clock working? Cut a jumper, or add one somewhere? Please let me know what I am doing wrong! Thanks. Ken Sumrall ken%hpda@hplabs.hp.com ...!hplabs!hpda!ken
reid@hplvec.LVLD.HP.COM (Reid Trimble) (02/06/91)
/ ken@hpclkms.cup.hp.com (Ken Sumrall) / 9:44 pm Jan 22, 1991 / / I recently tried to add a clock chip to my Apple /// and I can't seem to get / it to work. I bought the 58167 chip, inserted it in the socket on the / motherboard, and hooked up 4.5 volts to the battery connections on the / motherboard. However, the clock doesn't seem to respond to the system. / Do I need to do anything else to get the clock working? Cut a jumper, or add / one somewhere? / Ken Sumrall ---------- Ken, That's all I had to do to get the clock working in my Apple ///. It's been running for over 5 years now on the original set of penlite batteries I put in. You might look around the clock chip on the mother board and make sure all the parts are there (and well soldered). I heard a rumor at one time that some A///'s were shipped without the 32,768 Hz crystal but I doubt that, because Apple's upgrade kit never included one. In my system, the crystal looks like a silver .22 caliber shell casing with two leads. It's bent over and RTV'd to the board. You could also measure across the Vcc and Gnd pins on the clock chip with a DVM to make sure it's getting power. Regards, Reid