Master Interrupt Control; Tape Controller To Drive Interface Signals - ZiLOG System 8000 Hardware Reference Manual

HRM Zilog
Table 4-23
Master Interrupt Control
Register, Bit Definitions
BIT NAME DEFINITION
Bit
0
MIE Master interrupt enabled
Bit
IE
Interrupt enabled
Bit
2
DLe Disable lower chain
Bit
3
Not defined
Bit
4
Not defined
Bit 5
Not defined
Bit
6
IUS Interrupt under service
Bit
7
IP
Interrupt pending
HRM
Table 4-24 Tape Controller to Drive Interface Signals
SIGNAL DEFINITION
RWD\ Rewinds the tape
REV\ Moves the tape.backwards
FWD\ Moves the tape forward
WEN\ Enables writing and erasing on the tape
WDE\ Enables sending of write-data strobes and
the writing of data on the tape
WNZ\ Serial data to be
w~itten
to the tape
drive
TR1\,TR2\ Select tracks during read, write, and
erase track operation, according to
following code:
4-53
Zilog
4-53