68 PCA-6145/6145L User's Manual
System information I/O addresses
Address Description
00-0D * Real-time clock information
00 Second
01 Second alarm
02 Minutes
03 Minute alarm
04 Hours
05 Hours 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, drives A and B
11 Reserved
12 Fixed disk type byte, drives C and D
13 Reserved
14 Equipment byte
15 Low base memory byte
16 High base memory byte
17 Low expansion memory byte
18 High expansion memory byte
19-2D Reserved
2E-2F 2-byte CMOS checksum
30 * Low expansion memory byte
31 * High expansion memory byte
32 * Date century byte
33 * Information flags (set during power on)
34-3F Reserved