5–10 RIO Block Transfer
Publication
17476.6 - July 1996
M1 File - Block Transfer Input/Status Buffers
There are 32 BT status buffers allocated in the M1 file. These buffers
indicate the status for all BTR and BTW operations and also contain
BTR input data. Below is the layout of BT buffer 1.
Important: The layout below is the same for all 32 M1 file BT
buffers.
M1:e.100 – Status flags that describe the status of the BTR and
BTW operations. Status flags are described in detail on the
following page.
M1:e.101 – Status of actual number of BTW words sent or the
number of BTR words received.
M1:e.102 – Contains the logical address you have selected in the
M0:e.102 file in rack, group, and slot number format. The logical
rack, group, and slot are combined into one word.
Which Slot Number To Use
When your adapter is configured for 2slot addressing, 0 is
the left slot and 1 is the right slot.
For both 1slot and 1/2 slot addressing the slot number is
always 0.
The Slot Number" (0 or 1) in M1:e.102 indicates
the logical slot number within a logical group. 0
designates the least significant image byte and 1
designates the most significant image byte.
Example M1:e.102 Configurations
Logical Rack 0, Group 0, Slot 0 = 0
Logical Rack 0, Group 0, Slot 1 = 1
Logical Rack 2, Group 3, Slot 1 = 231
Logical Rack 0, Group 7, Slot 0 = 70
The first number
(reading from
right to left) is the
Slot Number."
Word
8
Word 9
Word 7
Word 5
Word 6
Word 3
Word 4
Word 1
Word 2
Word 0
Logical
Rack 0
Word 26
Word 27
Word 25
Word 30
Word 28
Word 29
Word 31
Logical
Rack 3
Input Image Output Image
Group
0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Group 0
Group 1
Word 24
Word 23
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Group 7
Logical Slot 0
(Low Byte)
Logical Slot 1
(High Byte)
M1:e.102
Logical Address Example
M1:e.103 – The BTR/BTW error code. Refer to the M1 File Error
Codes table on the following page.
M1:e.104 through M1:e.109 – These words are reserved.
M1:e.110 through M1:e.173 – BTR data Words 0 through 63.
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