Interphase Tech 4221 Buffer address, Number of Elements, Total transfer count, Element transfer count

Transmit -- In-Line Gathers

Table 3-31. Transmit - In-Line Gathers

Transmit - In-Line Gathers

Offst	15	14	13	12	11	10		9		8	7	6	5	4	3	2	1	0
0x06								Number of Elements
0x07								Total Transfer Count
0x08									Reserved
0x09							Element Transfer Count
0x0A							Buffer Address (MSW)
0x0B							Buffer Address (LSW)
0x0C									Reserved
0x0D							Buffer Address (MSW)
0x0F							Buffer Address (LSW)
									. . .

Number of Elements

This field contains the number of gather elements included in the IOPB. The only physical limit on this value is that the size of the total IOPB to be processed by the controller must fit in the IOPB length field in the CQE. Practically, however, this value should not exceed 4.

Total transfer count

This field contains the total number of bytes to be transferred for all elements. This value must match the sum of all the element transfer counts.

Element transfer count

This field contains the number of bytes located at the physical address associated with this element.

Buffer address

This field contains the VMEbus physical address for the data associated with this gather element.

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