HP Vectra User Manual

Table 2.9
CMOS RAM Memory Map
Address
Type
Notes
Application
OOH
RTC Reg
*
Seconds
01H
RTC Reg
*
Seconds alarm
02H
RTC Reg
*
Minutes
03H
RTC Reg
*
Minutes alarm
04H
RTC Reg
*
Hours
OSH
RTC Reg
*
Hours alarm
06H
RTC Reg
*
Day of Week
07H
RTC Reg
*
Date of Month
08H
RTC Reg
*
Month
09H
RTC Reg
*
Year
OAH
RTC Reg
*
Status Reg ister A
OBH
RTC Reg
*
Status Register B
OCH
RTC Reg
*
Status Register C
ODH
RTC Reg
*
Status Register D
OEH
RAM Byte
*
Diagnostic status byte
OFH
RAM Byte
*
Shutdown status byte
10H
RAM BYTE
Flexible disc drive type (A and B)
11 H
RAM BYTE
Reserved
12H
RAM BYTE
Hard disc drive type (C and D)
13H
RAM BYTE
Reserved
14H
RAM BYTE
Equipment byte
1SH
RAM BYTE
Low base memory byte
16H
RAM BYTE
High base memory byte
17H
RAM BYTE
Low expansion memory byte
18H
RAM BYTE
High expansion memory byte
19H-20H
RAM BYTE
Reserved
21 H-27H
RAM BYTE
*
Reserved
28H
RAM BYTE
HP Checksum
29H
RAM BYTE
* 0/0
Reserved
2AH-2BH
RAM BYTE
* 0/0
Reserved
2CH-2DH
RAM BYTE
* 0/0
Reserved
2EH-2FH
RAM BYTE
*
2 byte CMOS checksum
30H
RAM BYTE
*
Low expansion memory byte
31H
RAM BYTE
*
High expansion memory byte
32H
RAM BYTE
*
Date century byte
33H
RAM BYTE
*
Information flags
34H-3FH
RAM BYTE
Reserved
* Indicate bytes which are not included in the CMOS checksum calculation.
0/0 These bytes will be included in the HP checksum calculation.
Processor Board 43

HP Vectra Specifications

General

Processor	Intel Pentium
RAM	Up to 128 MB
Storage	HDD (capacity varies by model)
Operating System	Windows 95
Graphics	Integrated
Ports	Serial, Parallel
Expansion Slots	ISA, PCI