Expanding Memory; General Rules For Ltering Memory - Intel SYSTEM 310 Configuration Manual

Configuring Memory
System 310
EXPANDING MEMORY
s mentioned previously, you can add memory boards to the System
310 to increase its memory size. When modifying your own system
memory, you can add or remove boards, or combine them with the
iSBC 056 memory board (a compatible board not supplied as part of
a preconfigured system). Memory can be added up to a total of 1
megabyte, the upper limit of memory that the 8086 CPU can directly
address.
GENERAL RULES FOR AL ERING MEMORY
Be sure to follow these general rules when changing the memory
configuration of your system:
• The System 310 expects contiguous R M. lthough there must
be a gap between the top of R M and the memory you use for
intelligent communications controllers (typically located at
E0000H), make sure there are no gaps in the address space from
00000H to the top of R M.
• The bootstrap loader needs R M at 00000H.
• If using more than one full-sized MULTIBUS memory board, you
must relocate the status/error register on one of the boards, or
the parity error information it contains may be incorrect. This
is done with jumpers and explained in Chapter 3.
Table 1-1 itemizes the System 310 memory boards and provides
information you need to add or remove memory in your system. It
lists the amount of memory each board provides and the board's
address range. This manual refers to the combinations in this table in
later chapters.
NOTE
Table 1-1 shows the memory boards arranged
with their address ranges starting in a
particular order. Chapters 3 and 4 explain
how to jumper the memory boards for only
these addresses.
While it is certainly possible to change the
order of the memory boards from the one
shown here, you may need to refer to the
product manuals listed in the Preface for more
jumper information.
1-2