HP Vectra Technical Reference Manual page 387

0100H 256K of base memory installed
0200H 512K of base memory installed
0280H 640K of base memory installed
The actual stored value will be adjusted to leave space for the EX-BIOS data area. For example,
the value may be OOFCH instead of 01 DOH, indicating that there is 256K of base RAM installed
but the EX-BIOS data area is using 4K of it.
CMOS_BASE_MEMORY_LSB (CMOS Address
=
15H)
CMOS_BASE_MEMORY_MSB (CMOS Address
=
16H)
C.9 System Extended Memory Size (CMOS Address
17H-18H)
These values are initialized by the SETUP program to the user specified extended memory size
from zero to 15Mb in 512Kb increments. For example:
0200 512K of extended memory (0.5Mb)
0400 1024K of extended memory (1.0Mb)
0600 1536K of extended memory (1.5Mb)
through
3AOO 14848K of extended memory (14.5Mb)
3COO 15360K of extended memory (15.0Mb)
Note that extended memory is memory above one megabyte.
CMOS_EXT_MEMORY_LSB (CMOS Address
=
17H)
CMOS_EXT_MEMORY_MSB (CMOS Address
=
18H)
378 CMOS Memory Layout and Real-Time Clock