HP Q153090901, Техническое справочное руководство

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WRITE BUFFER 3Bh
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Memory sizes
Main buffer memory:
The Main Buffer memory is 128 MB.
Areas of the Main Buffer memory are used by the firmware. These should not be written to and
should not be expected to retain values that are written to them. Any Write and Read Buffer tests
can be performed while the drive is idle. If the drive is reading or writing, the data being written or
read can be corrupted.
Since the drive has more than 16 MB of Main Buffer memory, additional buffer IDs have been
defined to allow the whole buffer to be accessed in 16 MB segments. These are defined as follows:
Main processor memory:
Not all the Processor memory space is accessible. Take care when writing to any addresses within
this buffer.
SCSI burst buffer:
Addressable range from 00000h through 3F8000h.
PCA EEPROM:
The write range is limited to 500h bytes, starting at 100h (TapeTools area).
Buffer ID Address
20h 000 Buffer Offset (same as Buffer ID 00h)
21h 010 Buffer Offset (that is, +16 MB)
22h 020 Buffer Offset (that is, +32 MB)
23h 030 Buffer Offset (that is, +48 MB)
24h 040 Buffer Offset (that is, +64 MB)
25h 050 Buffer Offset (that is, +80 MB)
26h 060 Buffer Offset (that is, +96 MB)
27h 070 Buffer Offset (that is, +112 MB)