User`s guide

INSTALLING ADAPTER CARDS
HARDWARE SETTINGS
2 - 2 I-E97-811-1C
®
Switch settings for the following recommended computers are
to be found in Appendix C:
HP VECTRA XU/XUC/XMA 590 - ETHERNET
HP VECTRA VL2 - ETHERNET
DEC VENTURIS (486) - ETHERNET
DEC VENTURIS (486) - CLIENT - ETHERNET
DEC CELEBRIS/VENTURIS 590 - ETHERNET
Memory Address Locations
Each PC made to AT Compatible standards has memory allo-
cated between 640K and 1MB for use with expansion cards.
The addresses start at A0000 and continue to FFFFF. The
memory blocks are in 64K segments and a typical map looks
something like this:
A0000-AFFFF EGA/VGA VIDEO LOCATION
B0000-BFFFF CGA/MONO (TEXT MODE ON VGA CARD)
C0000-CFFFF Hard Disk ROM (SOME SPACE AVAILABLE)
D0000-DFFFF
E0000-EFFFF Large BIOS
F0000-FFFFF Not Available
The space from A0000 to AFFFF is used for the video EGA/
VGA, there may be some space available here or there may
not.
B0000 to BFFFF is not available since the text portion of the
VGA card uses this area.
C0000 to CFFFF has some available space, as an example you
can set your SCSI controller to sit at CC00 and have your
Ethernet card at C800. (The size between breaks is 16KB,
(4000hex), so that would be C8000 + 4000 = CC000.)
D0000 to DFFFF is unused initially, and is available for expan-
sion cards. This may be a ROM or RAM address depending on
the card being used.
E0000 to EFFFF is the last available memory location and may
already be used with a large BIOS.