40 PCIE-5565RC* Ultrahigh Speed Fiber-Optic Reflective Memory with Interrupts
Publication No. 500-9300875565-000 Rev. C.0
PCI Base Address Register 3 contains the starting address for PIO memory
mapped accesses to the Reflective Memory RAM. The value in this register is
loaded by the system BIOS. It depends on both the amount of installed SDRAM
and the settings of S1 switch positions 3 and 4. The address offset range is:
$0 to $01FFFFF for the 2 MByte window setting,
$0 to $0FFFFFF for the 16 MByte window setting,
$0 to $3FFFFFF for the 64 MByte window setting,
$0 to $7FFFFFF for the 128 MByte SDRAM option, and
$0 to $FFFFFFF for the 256 MByte option.
3
Prefetchable
(If Memory Space).
A one (1) indicates there are no side effects on
reads.
If I/O Space, Bit 3 is included in the base
address.
Yes
Mem: No I/
O: Yes
0
31:4
Memory Base Address
. Memory Base Address
for access to RFM registers.
Yes
Yes
$0
*
NOTE
: This register will be altered by the system BIOS during the system boot process.
Table 3-14 PCI Base Address Register 3 for Access to Reflective Memory
PCIBAR3: Offset $1C
Bit
Description
Read
Write
*Value
after PCI
Reset
0
Memory Space Indicator
. Writing zero (0)
indicates the register maps into Memory
Space. Writing a one (1) indicates the register
maps into I/O Space.
Yes
No
0
2:1
Register Location
. Values:
00 - Locate anywhere in 32-bit Memory Address
Space.
01 - Locate below 1 MByte Memory Address
Space.
10 - Locate anywhere in 64-bit Memory Address
Space.
11 - Reserved
If I/O Space, Bit 1 is always 0 and Bit 2 is
included in the base address.
Yes
Mem: No
I/O
Bit 1 no,
Bit 2 yes
00
3
Prefetchable
(If Memory Space).
Writing a one (1) indicates there are no side
effects on reads. Does not affect operation of
the Reflective Memory. The associated Bus
Region Descriptor register controls prefetching
functions of this address space. If I/O Space,
Bit 3 is included in the base address.
Yes
Mem: No
I/O: Yes
0
31:4
Memory Base Address
. Memory Base Address
for access to SDRAM.
Yes
Yes
$0
Table 3-13 PCI Base Address Register 2 for Access to RFM Control and Status Registers
PCIBAR2: Offset $18
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