ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 204

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

IBM3206K0424
IBM Processor for Network Resources
6.6: VIMEM Virtual/Real Memory Buffer Size
This register defines the total number of bytes to be occupied by each of the virtual or real buffers as well as
the spacing from one buffer to the next.
Length
Type
Address
Power On Value
Restrictions
ATM Virtual Memory Logic (VIMEM)
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3
Virtual/Real
Buffer Size
Bit(s)
3-0
2
1
These bits contain the encoded four-bit value that defines the virtual/real buffer size. The encoding is as follows:
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100 -1111 Reserved
0
64 bytes
128 bytes
256 bytes
512 bytes
1024 bytes
2048 bytes
4096 bytes
8192 bytes
16384 bytes
32768 bytes
65536 bytes
131072 bytes
4 bits
Read/Write
XXXX 0D04
X’2’
Care must be taken to set this register to a large enough value to contain the entire
frame being sent as well as certain control information that the hardware stores in
the buffer header. For example, if the maximum frame being sent or received is
1024 bytes long, then this register should be set to indicate 2048-byte frames to
allow sufficient room for the buffer header information added by the hardware.
Description
pnr25.chapt04.01
August 14, 2000
Preliminary