Specifications

Index
serial data outputs (SOUT) .................................. 8-15
serial registers
................................................. 8-16
baud rate generator
.......................................... 8-24
divisor latch access bit (DLAB)
..............................8-16
internal ID register (IIR)
.....................................8-28
line control register (LCR)
...................................8-21
line status register (LSR)
.................................... 8-26
scratchpad register (SCR)
....................................8-20
transmit and receive buffer registers
..........................8-20
service information
............................................ C-12
socket 3D1
.................................................... A-28
configuration
............................................... A-31
software support
STD DOS
....................................................1-3
STD ROM
................................................... 1-3
software triggered strobe
...................................... 11-20
special fully nested mode
..................................... 12-25
special mask mode
............................................12-26
specifications
absolute maximum ratings
....................................B-2
battery backup characteristics
.................................B-3
DC operating characteristics
..................................B-2
electrical and environmental
........................2-6, 13-8, B-2
mechanical
.................................................. B-6
specific EOI commands
.......................................12-32
specific rotating mode
........................................ 12-26
speed comparison, ZT 8809A and IBM PC
.......................3-3
square wave mode
............................................ 11-19
standby mode
................................................... 1-2
status flags
...................................................... 6-8
status indicator (LED)
..........................................3-25
STD bus
cascaded interrupts
.......................................... 3-13
compatibility
........................................... 1-11, 3-4
polled interrupts
.............................................3-10
vectored interrupts
.......................................... 3-12
ZT 8809A interface
.......................................... B-3
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