Interphase Tech CONDOR 4221 - Manual (Page 84)

Chapter 3 - MACSI Host Interface
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Address modifier
This field contains the VMEbus address modifier used for the transfer. Refer to your system documentation
for possible values for this field.
Memory type (MT)
This 2-bit field specifies the width of the data transfers. Permitted values are:
Table 3-17. Memory Type
Transfer type (TT)
This 2-bit field specifies the type of data transfer to be performed. Permitted values are:
Table 3-18. Transfer Type
Direction bit (DIR)
This bit is ignored.
Bit 9 Bit 8 Memory Type
0 0 Reserved (or Short I/O)
0 1 16 bit transfers
1 0 32 bit transfers
1 1 Reserved
Bit 11 Bit 10 Transfer Type
0 0 Normal Type
0 1 Block Mode
1 0 Reserved
1 1 VME D64 Block