Datasheet

Command Specifications
4-186 C141-C008
4.4.3 WRITE BUFFER (3B)
Bit
Byte
7 6 5 4 3 2 1 0
0 X‘3B’
1 0 0 0 0 Mode
2 Buffer Address (MSB)
3 Buffer Address
4 Buffer Address
5 Buffer Address (LSB)
6 Transfer Byte Length (MSB)
7 Transfer Byte Length
8 Transfer Byte Length (LSB)
9 0 0 0 0 0 0 0 0
This command is used in combination with the READ BUFFER command to
diagnose the normality of the IDD’s data buffer memory or the FC bus, or to
download microcode to the IDD.
The IDD stores data transferred from the INIT in accordance with the
specifications in this command's CDB to in the data buffer in the IDD. The IDD
have 6,733 K (6,895,200) byte data buffers. This command, using buffer
addresses with a range of X'000000' to X'693660', must specify data storage
positions in 1-byte units, and with 4-byte units addresses. The INIT can know the
IDD's buffer configuration and the units which addresses can be specified in by
issuing the READ BUFFER command.
The functions of this command and the format of data transferred from the INIT
are specified in the “Mode” field in byte 1 of the CDB and any of the transfer
modes shown in Table 4.124 can be selected.