COBHAM GR712RC User Manual

GR712RC-UM, Jun 2017, Version 2.9 13 www.cobham.com/gaisler
GR712RC
The corresponding checkbytes are located as follows (one checkbyte per 32-bit data word):
PROM bank 0: 4 byte data starting at 0x0000 0000 => checkbyte at 0x0001 FFFF
PROM bank 0: 4 byte data starting at 0x0000 0004 => checkbyte at 0x0001 FFFE
...
PROM bank 0: 4 byte data starting at 0x0001 9990 => checkbyte at 0x0001 999B
PROM bank 0: 4 byte data starting at 0x0001 9994 => checkbyte at 0x0001 999A
PROM bank 1: 4 byte data starting at 0x0008 0000 => checkbyte at 0x0009 FFFF
PROM bank 1: 4 byte data starting at 0x0008 0004 => checkbyte at 0x0009 FFFE
...
PROM bank 1: 4 byte data starting at 0x0009 9990 => checkbyte at 0x0009 999B
PROM bank 1: 4 byte data starting at 0x0009 9994 => checkbyte at 0x0009 999A
Note that after power-up reset only two PROM banks are active and the bank size is default 256MiB.
This effectively maps the usable data bytes of the two first PROM memory devices as follows:
PROM bank 0: 0x0000 0000 - 0x0001 9997
PROM bank 1: 0x1000 0000 - 0x1001 9997
The corresponding checkbytes are located as follows (one checkbyte per 32-bit data word):
PROM bank 0: 4 byte data starting at 0x0000 0000 => checkbyte at 0x0001 FFFF
PROM bank 0: 4 byte data starting at 0x0000 0004 => checkbyte at 0x0001 FFFE
...
PROM bank 0: 4 byte data starting at 0x0001 9990 => checkbyte at 0x0001 999B
PROM bank 0: 4 byte data starting at 0x0001 9994 => checkbyte at 0x0001 999A
PROM bank 1: 4 byte data starting at 0x1000 0000 => checkbyte at 0x1001 FFFF
PROM bank 1: 4 byte data starting at 0x1000 0004 => checkbyte at 0x1001 FFFE
...
PROM bank 1: 4 byte data starting at 0x1001 9990 => checkbyte at 0x1001 999B
PROM bank 1: 4 byte data starting at 0x1001 9994 => checkbyte at 0x1001 999A
Thus the first PROM memory device is accessible with the same address mapping as after the PROM
bank size has been modified. The second PROM memory device is accessible but with a different
address mapping. The third and the fourth PROM memory devices are not accessible until the PROM
bank size has been modified. (Note that the checkbytes values do not change as such.)
Example 2:
Assuming one is using two 256MiB PROM memory devices, each with its own PROM select signal.
With the default power-on values, the PROM bank size is 256MiB and only two PROM banks are in
use. It is possible to use the two PROM banks with EDAC protection in 8-bit operation.
The first bank is located at address 0x0000 0000, and the second PROM bank is located at its default
address staring at 0x1000 0000 (i.e. 256MiB bank size default). One can use 80% of each memory
device, thus the following ranges can be used for user data:
PROM bank 0: 0x0000 0000 - 0x0CCC CCCB
PROM bank 1: 0x1000 0000 - 0x1CCC CCCB
The corresponding checkbytes are located as follows (one checkbyte per 32-bit data word):
PROM bank 0: 4 byte data starting at 0x0000 0000 => checkbyte at 0x0FFF FFFF
PROM bank 0: 4 byte data starting at 0x0000 0004 => checkbyte at 0x0FFF FFFE
...
PROM bank 0: 4 byte data starting at 0x0CCC CCC4 => checkbyte at 0x0CCC CCCE
PROM bank 0: 4 byte data starting at 0x0CCC CCC8 => checkbyte at 0x0CCC CCCD
PROM bank 1: 4 byte data starting at 0x1000 0000 => checkbyte at 0x1FFF FFFF
PROM bank 1: 4 byte data starting at 0x1000 0004 => checkbyte at 0x1FFF FFFE
...
PROM bank 1: 4 byte data starting at 0x1CCC CCC4 => checkbyte at 0x1CCC CCCE
PROM bank 1: 4 byte data starting at 0x1CCC CCC8 => checkbyte at 0x1CCC CCCD

COBHAM GR712RC Specifications

General

Brand	COBHAM
Model	GR712RC
Category	Computer Hardware
Language	English