ICS TRIPLEX T8912 Channel output module

The device probe mechanism utilizes the SCSI commands "Inquiry" and "Mode Sense". If the specified controller is non-SCSI, the probe simply returns a status of "device present and unknown". The device probe makes an entry into the device descriptor table with the pertinent data. After an entry has been made, the next time a probe is done it simply returns with "device present" status (pointer to the device descriptor).

BI works through the memory block by reading from locations and checking parity. If the parity is not correct, then the data read is written back to the memory location in an attempt to correct the parity. If the parity is not correct after the write, then the message "RAM FAIL" is output and the address is given. This command may take several seconds to initialize a large block of memory.

Description

 The BI command may be used to initialize parity for a block of memory. The BI command is non-destructive; if the parity is correct for a memory location, then the contents of that memory location are not altered. The limits of the block of memory to be initialized may be specified using a range. The option field specifies the data size in which memory is initialized if range is specified using a count. The option also specifies the size of data element to which the count refers. The length option is valid only when a count is entered.

Block of Memory Move

The BM command copies the contents of the memory addresses defined by range to another place in memory, beginning at address. The option field is only allowed when range is specified using a count. In this case, the B, W, or L defines the size of data that the count is referring to. For example, a count of 4 with an option of W would mean to move 4 words (or 8 bytes) to the new location. If an option field is specified without a count in the range, an error results.

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