PCjr ROM-CLOCK software installation instructions.


PROGRAM INSTALLATION:

1.  Copy the READ_CLK.COM program onto your 'boot' disk.

    A.	Put the ROM-CLOCK disk in your diskette drive.

    B.	Type 'COPY READ_CLK.COM B:/V' (do not type in the single quotes),
	then press the 'Enter' key.

    C.	Wait until the system prompts you to insert a disk in the B: drive.

    D.	Remove the ROM-CLOCK disk and insert the disk that you want to use as
	a boot disk for your PCjr system.  (a 'boot' disk is a disk you place
	in your diskette drive when you first turn on your PCjr)

    E.	Press the 'Enter' key.  A copy of the program is now on your 'boot'
	disk.

2.  Copy the SET_CLK.COM program onto your 'boot' disk.

    A.	Put the ROM-CLOCK disk in your diskette drive.

    B.	Type 'COPY SET_CLK.COM B:/V' (do not type in the single quotes),
	then press the 'Enter' key.

    C.	Wait until the system prompts you to insert a disk in the B: drive.

    D.	Remove the ROM-CLOCK disk and insert the disk that you want to use as
	a boot disk for your PCjr system.  (a 'boot' disk is a disk you place
	in your diskette drive when you first turn on your PCjr)

    E.	Press the 'Enter' key.  A copy of the program is now on your 'boot'
	disk.

3.  Add the word 'READ_CLK' in the AUTOEXEC.BAT file on your 'boot' disk, and
    remove the DOS DATE and TIME commands from the file.

    A.	With your 'boot' disk in the diskette drive, type in
	'DIR AUTOEXEC.BAT'.

    B.	If 'File not found' is displayed, type the following:
	   'COPY CON AUTOEXEC.BAT' then press the 'Enter' key,
	   'READ_CLK'              then press the 'Enter' key,
	   press the 'Fn' key followed by the '6' key.  Your 'boot' disk is
	   now ready to use.

    C.	If the file is listed, you need to edit the file, and add the line
	'READ_CLK'.  In addition, if the 'DATE' and 'TIME' lines are in the
	file, they must be removed.

	a. Insert your DOS main disk.

	b. Type in 'EDLIN B:AUTOEXEC.BAT' then press the 'Enter' key.
 
	c. Remove the DOS disk, and insert your 'boot' disk.

	d. Press the 'Enter' key, and a '*' will be displayed.

	e. Type in 'I' then press the 'Enter' key to insert a line in the file.

	f. Type in 'READ_CLK' then press the 'Enter key'.

	g. Press the 'Ctrl' and 'C' key at the same time.  This will end the
	   insert mode, and a '*' will be displayed.

	h. Type in 'L' then press the 'Enter' key.  This lists the file.

	i. If a line is just the word 'DATE' or 'TIME' it should be deleted.
	   Type the line number followed by a 'D' then press return to delete
	   a line.  Before you delete a second line, 'L'ist the lines again,
	   because the EDITOR renumbers the lines after you delete each line.

	j. Type in 'E' to end editing the file.

	k. Now your 'boot' disk is ready to use.



SETTING THE ROM-CLOCK'S DATE AND TIME  (Keeps track of time while your computer
computer is off):

1.  Set the DOS date and time to the current date and time.

    A.	To set the date, use the DOS DATE function: type in 'DATE', followed by
	the date in MM/DD/YY format, then press the 'Enter' key.
	Example: DATE 12/25/86	(Christmas day 1986)

    B.	To set the time, use the DOS TIME function: type in 'TIME', followed by
	the time in HH:MM:SS format (24 hour time), then press the 'Enter' key.
	Example: TIME 14:30:05	(5 seconds after 2:30 p.m.)

2.  Copy DOS's date and time into the ROM-CLOCK.

    A.	Insert your 'boot' disk (the one modified as described above), or the
	PC Enterprise's ROM-CLOCK disk, into the 'A' diskette drive.

    B.	Type in 'SET_CLK', then press the 'Enter' key.

READING THE ROM-CLOCK'S DATE AND TIME  (Used by your programs while the
computer is on):

1.  If you turn on your computer (or by pressing the Ctrl, Alt, and Del keys
    simultaneously) with your 'boot' disk (the one modified as described
    above) the date and time will be set automatically.

2.  If you want to manually set your PCjr's date and time from the ROM-CLOCK,
    insert your 'boot' disk (the one modified as described above), or the
    PC Enterprise's ROM-CLOCK disk, into the 'A' diskette drive and type in
    'READ_CLK' then press the 'Enter' key.

ADVANCED APLICATIONS:

1.  Running READ_CLK on a computer without a ROM-CLOCK installed.

    The READ_CLK program will not harm a PCjr that does not have a ROM-CLOCK
    installed, but an error message will be displayed.

    READ_CLK passes back an ERRORLEVEL to the batch file:
       0 - Date and time are valid
       1 - The date is invalid
       2 - The time is invalid

    A simple change to your AUTOEXEC.BAT file will provide an easy solution
    to setting the date and time if the PCjr does not have a ROM-CLOCK
    installed:

    Original AUTOEXEC.BAT file
      .
      .
      .
    READ_CLK
      .
      .
      .


    Modified AUTOEXEC.BAT file
      .
      .
      .
    READ_CLK
    IF NOT ERRORLEVEL 1 GOTO OK
    DATE
    TIME
    :OK
      .
      .
      .


2.  Displaying the date and time as part of your DOS prompt.

    To display the date and time for every DOS command you enter, add the
    following line to the end of your autoexec.bat file.

    PROMPT $T$H$H$H$H$H$H  $D  $N$G

    This will cause the prompt to change from the familiar 'A>' to:

    14:30  Thu 12-25-86  A>