NorthStar HORIZON Random Access Memory User Manual page 19

3.1.2 EXAMPLE 2: FOUR BANKS
In this example, the
board, three HRAM-32 boards, and a standard Micro-Disk
Controller
revision B. The switches and jumper plugs for this
example are shown in Figure 3-3.
The 48K board is partitioned into two segments, OOOOH
through 7FFFH, and 8000H through BFFFH. An operating
system that requires 16K of memory is loaded into the
region between
turned on. The other segment of this board is bank
switched, and is designated the bank to be turned on
when the system powers up or resets.
All three 32K boards have their memory starting at
OOOOH. All are bank switched off and on as single
units, and all are programmed to be turned off when
the system is powered up or reset.
Parity checking is left in the standard North Star
configuration.
HRAM
HORIZON contains one HRAM-48
board at E8OOH.
8000H-BFFFH.
All HRAM boards
This segment
USER/TECHNICAL MANUAL
are
is always