ZiLOG System 8000 Hardware Reference Manual page 112

HRM
Zilog
CG10 16 WORD
BLOCK 3
COMMAND AND
CGOO CIS REGISTERS
111"1111,' 1 111
1
1
HIGH
HRM
B810
BEIOO
16 WORD
BLOCK 2
COMMAND AND
CIS REGISTERS
AA,10 16 WORD
BLOCK 1
COMMAND AND
AAOO CIS REGISTERS
o
0 1 7 5
LOW
Figure 4-5 Disk Coniroller, I/O Space
~.5.2.2
Controller/Drive Interface: Communications between
the disk controller and a selected disk drive travel over
the P2/J23 mating connectors. Table 4-13 lists and defines
the signals on these lines. The disk controller can control
either a CDC or Finch drives. All drives attached to any
controller must be of one type. Table 4-17 lists the codes
for the command and status words on the control bus between
the disk controller and the disk drive.
4-19
Zilog
4-19