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- Newsgroups: comp.sys.ti
- Path: sparky!uunet!ukma!darwin.sura.net!uvaarpa!murdoch!COHEN@GOMEZ.PHYS.VIRGINIA.EDU
- From: cohen@GOMEZ.phys.virginia.edu
- Subject: Real time clocks
- Message-ID: <009674A7.5FDBD000@GOMEZ.PHYS.VIRGINIA.EDU>
- Sender: usenet@murdoch.acc.Virginia.EDU
- Reply-To: cohen@GOMEZ.phys.virginia.edu
- Organization: Dept. of Physics, University of Virginia
- Date: Thu, 28 Jan 1993 20:14:32 GMT
- Lines: 32
-
- I am aware of the following three real time clocks-
-
- 1. CorComp clock, as found on Triple Tech card (and I think also on a stand-
- alone clock sidecar peripheral, though I have never seen one). It opens
- from TI BASIC or XB as a file name "CLOCK".
-
- 2. MBP clock, as found on the MBP clock/analog-digital converter. It can be
- read/written to from XB using CALL LOAD commands.
-
- 3. The HFDC clock, opens from TI BASIC/XB as a file name "TIME".
- Does it use the same clock chip as one of the above?
- I understand that this is a lousy clock. It does not keep the time correctly
- (and also has no battery backup). One has to enter the time at each power-up
- process -- really annoying. Has anybody devised a battery poer backup for this
- clock?
-
- Unless I get it wrong for some reason, it seems to me that all the above clocks
- can simultaneously co-exist in the PEBox and accessed without confusion, right?
- At least from TI BASIC, that is...
-
- There is also the P-GRAM card clock option. Hardware-wise this is an MBP clock,
- but there is a built-in software emulation of the CorComp clock in TI BASIC
- (i.e., programs that access the CorComp clock chip directly will not recognize
- the P-GRAM clock, only TI BASIC commands will).
-
- Will anybody contribute information on other clocks? We heard about the BWG
- controller having a clock, and it seems like this is a relatively simple
- thing to put an most any card. (Though I have not heard of any inside the
- console, except for a cheap $2 LCD digital clock that you can stick on
- the console :-) (That is like a friend's math coprocessor for the TI-99/4A,
- which was a $5 solar powered little calculator that he attached to the
- top of his console.. hehehe :-) :-)
-