Acrosser AR-B9612 - Manual (Page 14)

AR-B9612 User’s Guide
2-9
2.6 REAL-TIME CLOCK AND NON-VOLATILE
RAM
The AR-B9612 contains a real-time clock compartment that
maintains the date and time in addition to storing configuration
information about the computer system. It contains 14 bytes
of clock and registers and 50 bytes of general purpose RAM.
Because of the use of CMOS technology, it consumes very little
power and can be maintained for long period of time using an
internal lithium battery.
Address Description
00 Seconds
01 Second alarm
02 Minutes
03 Minute alarm
04 Hours
05 Hour alarm
06 Day of week
07 Date of month
08 Month
09 Year
0A Status register A
0B Status register B
0C Status register C
0D Status register D
0E Diagnostic status byte
0F Shutdown status byte
10 Diskette drive type byte, drive A and B
11 Fixed disk type byte, drive C
12 Fixed disk type byte, drive D
13 Reserved
14 Equipment byte
15 Low base memory byte
16 High base memory byte