CP/M/CPM_CDROM.iso/jsage/znode3/latest/clock24.lbr/CLOCK24.DZC/CLOCK24.DOC

Text File | 1994-02-02 | 2.6 KB | 64 lines

This program will set or read the MM58167 clock chip used by the
Kenmore clock, the Anapro clock for the H89, the CDR Super RAM 89
clock for the Heath H89, and perhaps others.

INTRODUCTION:

Thi≤ clocδ ha≤ n∩ yea≥ por⌠ howeve≥ thσ yea≥ i≤ usuall∙ storeΣ at
thσ clocδ basσ por⌠ plu≤ 9« Thσ clocδ doe≤ no⌠ 'rol∞ overº thσ ì
yea≥ oε Januar∙ ▒ anΣ doe≤ no⌠ recognizσ lea≡ years« Thσ clocδ
does not handle Day Light Savings time(I am not sure any clock
for 8 bit computers does this). CLOCK.COM overcomes these
deficiencies by using the clock RAM to store and retrieve needed
information.

INSTALLATION:

T∩ usσ thσ prograφ yo⌡ neeΣ t∩ bσ surσ thσ basσ por⌠ fo≥ you≥
clocδ i≤ installed«  Thσ basσ por⌠ should bσ installeΣ b∙ usinτ
the included clock24.cfg with ZCNFG. The values for the Kenmore,
Anapro H89 and CDR H89RAM clocks are noted in the CFG file.

Several other options are available and are explained by the
CFG file.

èUSING THE PROGRAM:

Enter CLOCK ? at the command line to see the options for setting
or reading the clock. The first time you set the clock you must
set the day-mon-yr hour:minute:second. The hour must be entered
in the 24 hour format when setting the clock(07=7 a.m, 19=7 p.m.).

CLOCK.COM will run under ZCPR3 or standard CP/M. If you are using
ZCPR3, you may use the 'S' option to store the current time in
the Z3 message buffer. Later using the 'E' option you may
determine the time that had elapsed to the hundredth of a second
since the time was first stored. For example, if you want to know
how long it takes program 'test' to perform its function,
'clock s;test;clock e' will report the elapsed time. This will
work best if run from a RAM disk or a hard disk. [A caveat--
the TEST program must not use the same Z3 message registers as
CLOCK.COM).

The program U option allows updating of the clock chip to
automatically adjust for a slow or fast clock. You first
set the clock with two known date/times, such as from WWV,
2 to 7 days apart. Then CLOCK U will use this data to reset
the clock. You MUST always use the same copy of the program
to set or update the clock. I suggest that in all but your
main copy of CLOCK that you disable the U option. If you want
other copies of CLOCK to set the clock or do not want to use
the update option you should use ZCNFG to set the wrtflg to YES.


Biff Bueffel
19820 N.W. Metolius Drive
Portland, Oregon 97229-2864

[phone] (voice)

Messages may be left for me on

    1) Al Hawley's BBS [phone]

    2) Jay Sage's BBS [phone]