ZiLOG System 8000 Hardware Reference Manual

HRM
Zilog
HRM
4.5.4.1 ZBI Interface: The controller and the host communi-
cate through eight 16-bit (word) read/write registers.
These registers appear in the controller's I/O space at
addresses 4GH through 4EH. (The H stands for hexadecimal.)
Table 4-18 lists these registers and their assignments.
On-board jumpers provide a means of changing the ZSI addtess
of the controller board. These jumpers are listed in Table
4-19. The bit assignments of the upper byte of the inter-
rupt vector are listed in Table 4-20. The commands that the
host sends to the controller are listed in Table 4-21, and
Table 4-22 defines the bits in the status register. Table
4-23 lists the bits in the Master Interrupt Control (MIC)
register. All of the possible error conditions are listed
in Appendix C.
4.5.4.2 Drive Interface: The tape controller sends commands
to the tape drive to control its operation. These commands
set the drive address, track address, and motion controls.
Table 4-24 lists the commands that the controller sends to
the drive. The drive responds to the controller by sending
information back to the controller. Table 4-25 lists the
information that the drive sends to the controller.
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ZiLOG System 8000 Specifications

General

Brand	ZiLOG
Model	System 8000
Category	Desktop
Language	English