Configuring an M1 CPU with Modsoft

Reading the Time-of-Day Clock

 

 

Overview

 

 

 

 

This section tells how to read the time-of-day clock and uses an example to

 

describe how to interpret the time-of-day clock registers.

 

 

 

 

 

Reading the

Set the value 4000H in register 4x to read data from the clock.

Clock

 

 

 

 

 

Example

 

 

 

 

If you reserved registers 400100...400107 as your TOD clock registers, set the time

 

bits, and then read the clock at 9:25:30 on Thursday, July 16, 1998, the registers

 

would display the following values:

 

 

 

 

 

 

 

 

Register

Reading

Indication

 

 

 

 

 

 

 

 

400100

0

1 1 0 0 0 0 0 0 0 0 0 0 0 0 0

All clock values have been set;

 

 

 

 

 

clock values are being read

 

 

 

 

 

 

 

 

400101

5

(decimal)

Thursday

 

 

 

 

 

 

 

 

400102

7

(decimal)

July

 

 

 

 

 

 

 

400103

16 (decimal)

16

 

 

 

 

 

 

 

400104

98 (decimal)

1998

 

 

 

 

 

 

 

 

400105

9

(decimal)

9 a.m.

 

 

 

 

 

 

 

40010 6

25 (decimal)

25 minutes

 

 

 

 

 

 

 

40010 7

30 (decimal)

30 seconds

 

 

 

 

 

 

 

 

 

 

 

 

 

870 USE 101 10 V.2

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Image 231
Schneider Electric Processor Adapter Reading the Time-of-Day Clock, Clock Example, Would display the following values