SCSI Registers
4-113
Registers: 0xD4–0xD7
Instruction Address (IA)
Read/Write
IA
Instruction Address
[31:0]
This register always contains the address of the BMOV
instruction that was executing when the phase mismatch
occurred. This value will always match the value in the
except in the case of a
Table Indirect BMOV in which case the ESA will have the
address of the Table Indirect entry and this register points
to the address of the BMOV instruction.
Registers: 0xD8–0xDA
SCSI Byte Count (SBC)
Read Only
SBC
SCSI Byte Count
[23:0]
This register contains the count of the number of bytes
transferred to or from the SCSI bus during any given
BMOV. This value is used in calculating the information
placed into the
and
registers and should not need to
be used in normal operations.
There are several conditions for which the byte count
does not match the number of bytes transferred. If a
BMOV transfers an odd number of bytes across a wide
bus, the byte count at the end of the BMOV is one byte
greater than the number of bytes sent. This also occurs
in an odd byte count wide receive case. Lastly, when a
wide send occurs and a chain byte from a previous
transfer is present, the byte count does not reflect the
chain byte sent across the bus during that BMOV. To
31
0
IA
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
23
0
SBC
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Содержание LSI53C1000
Страница 6: ...vi Preface...
Страница 16: ...xvi Contents...
Страница 28: ...1 12 Introduction...
Страница 234: ...4 124 Registers...
Страница 314: ...6 40 Specifications This page intentionally left blank...
Страница 318: ...6 44 Specifications This page intentionally left blank...
Страница 344: ...6 70 Specifications This page intentionally left blank...
Страница 350: ...6 76 Specifications Figure 6 42 LSI53C1000 329 Ball Grid Array Bottom view...
Страница 352: ...6 78 Specifications...
Страница 360: ...A 8 Register Summary...
Страница 376: ...IX 12 Index...