Specifications

Index
ZT 8809A ....................................................1-5
board dimensions
............................................... B-7
Borland
.................................................... 2-7, C-2
break for emulation (BRKEM)
................................. 6-14
break interrupt (BI) indicator
................................... 8-27
BUSAK*
............................................1-7, 3-16, 6-18
bus control unit (BCU)
.......................................... 6-2
BUSRQ*
............................................ 1-7, 3-16, 6-18
-C-
cables
ZT 90039 printer cable
.......................... 2-16, 9-14, B-22
ZT 90014 serial cable
........................ 2-12, 3-5, B-20, C-3
ZT 90027 serial cable
.................................. 3-5, B-21
call native routine (CALLN)
................................... 6-15
cascade buffer/comparator
.................................... 12-10
cascaded interrupts
.............................................3-13
Centronics printer interface
.....................1-12, 2-16, 5-15, 9-1
block diagram
................................................ 9-2
control port interrupt capability
............................... 9-9
control port register
...........................................9-8
control port shared signals
................................... 9-10
data port register
............................................. 9-6
disabling sharing of signals
.................................. 9-12
optional printer cable pinout
................................. 9-14
register definitions/addresses
..................................9-5
shared printer signals
........................................ 9-13
status port register
............................................ 9-7
using the printer port
......................................... 9-4
clear to send (CTS*)
..................................... 8-11, 8-33
clock slowdown
.......................................... 1-13, 3-28
CMOS versions
................................. 1-3, 2-3, 3-27, 13-1
added features
...............................................3-27
addition of optional 8087(-2)
................................ 13-4
clock slowdown mode
.......................................13-4
80C88 processor
............................................ 13-3
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