Motorola MVME1X7P - Manual (Page 241)

Programming Model
http://www.motorola.com/computer/literature 3-43
3
Printer BUSY Interrupt Control Register
IL2-IL0 These three bits select the interrupt level for the printer
BUSY. Level 0 does not generate an interrupt.
ICLR In edge-sensitive mode, writing a logic 1 to this bit clears
the INT status bit. This bit has no function in level-
sensitive mode. This bit is always read as zero.
IEN When this bit is high, the interrupt is enabled. The
interrupt is disabled when this bit is low.
INT When this bit is high, a printer BUSY interrupt is being
generated at the level programmed in IL2-IL0 (if
nonzero).
E/L* When this bit is high, the interrupt is edge-sensitive. The
interrupt is level-sensitive when this bit is low.
PLTY When this bit is low, interrupt is activated by a rising
edge/high level of the BUSY pin.
When this bit is high, interrupt is activated by a falling
edge/low level of the BUSY pin.
Note that if this bit is changed while the E/L* bit is set (or
is being set), a BUSY interrupt may be generated. This
can be avoided by setting the ICLR bit during write cycles
that change the E/L* bit.
ADR/SIZ $FFF42034 (8 bits)
BIT 31 30 29 28 27 26 25 24
NAME PLTY E/L* INT IEN ICLR IL2 IL1 IL0
OPER R/W R/W R R/W C R/W R/W R/W
RESET 0 PL 0 PL 0 PL 0 PL 0 PL 0 PL 0 PL 0 PL