Article 3161 of comp.os.cpm: Path: nosun!littlei!omepd!mipos3!orc!decwrl!ucbvax!ucsd!swrinde!zaphod.mps.ohio-state.edu!sunybcs!nsscb!ameyer From: ameyer@nsscb.UUCP (Andy Meyer) Newsgroups: comp.os.cpm Subject: Re: CP/M clock Summary: Try a Kenmore RTC Message-ID: <1195@nsscb.UUCP> Date: 11 Jan 90 17:32:54 GMT References: <2401@sactoh0.UUCP> Reply-To: ameyer@nsscb.UUCP (Andy Meyer) Organization: AT&T NSSC S. Plainfield, NJ Lines: 21 In article <2401@sactoh0.UUCP> ianj@sactoh0.UUCP (Ian R. Justman) writes: > Just curious, has anyone successfully implemented the MM58174AN > real-time clock chip on their system, whether S-100 bus or not? If your system has a Z80 CPU, you may want to try a Kenmore Z-Time clock. It's a piggyback board which plugs into the CPU socket of your machine and then you plug your CPU chip into the clock board. It looks very easy to "talk to", although I'm still having a tough time trying to cram one into my Altos 580. (The motherboard is below the hard disk and controller, and there's very little clearance. Then, of course, the 40-pin DIP headers I bought to build an extender cable hang too far over the edges of the socket, and interfere with other chips...) I don't have their address handy, but the Z-Time clock is made by an outfit in Rochester, NY. It shouldn't be too tough to find one. Andy -- Andreas Meyer N2FYE AT&T National Systems Support Center uucp: ..!sunybcs!nsscb!ameyer or: ameyer%nsscb@sunybcs.cs.buffalo.edu Remember: Never moon a werewolf. att!ulysses!nsscb!rebus!ameyer Article 3164 of comp.os.cpm: Path: nosun!omepd!mipos3!orc!decwrl!lll-winken!lll-lcc!rzh From: rzh@lll-lcc.UUCP (Roger Hanscom) Newsgroups: comp.os.cpm Subject: Re: CP/M Clock Message-ID: <2728@lll-lcc.UUCP> Date: 12 Jan 90 06:35:33 GMT Organization: Lawrence Livermore Labs, LCC, Livermore Ca Lines: 16 There are plans in the Jul/Aug 1981 Microsystems Journal (p. 64) for a S-100 clock based on the MSM5832 chip. It uses an 8255 PPI chip for the clock port. Those of you with eleven bits of unused parallel port could probably rig up the clock chip on that with a minimum of parts count. I just got done wire wrapping the complete circuit for my S-100 system, and it works fine. Unfortunately the software published in the article got munged, so if anyone is interested, I can provide listings of what I came up with. I've got two clock-read entry points in ROMed code. One reads the clock and returns to the monitor (a monitor "date" command is next!), the other does a ret just like any other subroutine, so it can be called from an application. When CP/M boots, it prints the date and date at the top of the screen, and I put the day and date on printed listings. I just wish that there was an easy way to timestamp files in CP/M 2.2 @:^). roger rzh@lll-lcc.llnl.gov Article 3586 of comp.os.cpm: Path: nosun!omepd!inews!orc!bbn!usc!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!csfst1 From: csfst1@unix.cis.pitt.edu (Charles S. Fuller) Newsgroups: comp.os.cpm Subject: Re: No-Slot Clock? Summary: Try Central Computer Products (if they still exist) Message-ID: <23456@unix.cis.pitt.edu> Date: 10 Apr 90 21:03:01 GMT References: <54706@bbn.COM> Organization: Univ. of Pittsburgh, Computing & Information Services Lines: 15 In article <54706@bbn.COM>, gonzalez@bbn.com (Jim Gonzalez) writes: > ... Has anyone succeeded in locating a > supplier for this device? The March '88 issue of ProFiles (Kaypro's magazine) contains an ad from Central Computer Products, with a price of $49. I don't know if they're still in business, but it may be worth a try. The address given is 330 Central Avenue Fillmore, CA 93015 (805)524-4189 Good luck Chuck