HP 9030 Service Manual page 111

• Programmable format control and built-in framing
error, overrun error and parity checking.
• Break detection, support for X-ON/X-OFF and terminal
emulation mode.
Operation
The serial interface permits the following baud rates to
be configured by program control or by a switch that
selects the rate to be configured at power-up: 50, 75, 110,
134.5, 150, 300, 600, 900, 1200, 1800, 2400, 3600, 4800,
7200, 9600, 19200.
Note:
Not all data recognition features are supported for
continuous data transfer at 19200 baud.
The following formats and protocols are also
programmable:
• Parity: none, odd, even, "0" or "1".
• Number of bits per character: 5, 6, 7, or 8 plus parity.
• Number of stop bits: 1, 1.5" or 2.
• Handshaking: ENQ/ ACK and X-ON/X-OFF
The on-board microprocessor and buffering of the
27128A offer efficient, high-performance terminal
handling. The 27128A card has enough buffer space to
store up to 485 characters on input and 500 on output.
The on-board processor allows the user to edit the buffer
with delete character and delete line commands. These
features significantly reduce the time spent by the CPU to
handle data entry from terminals.
In addition, the 27128A offers numerous features for
satisfying more specialized data communication and
serial interfacing requirements. The features listed below
are currently accessible to user programs through the
Series 500 BASIC Language System only. Many of these
features are also accessible through HP-UX's
Asynchronous Communication software and BASIC's
Asynchronous Terminal Emulator. These two packages
are designed to help develop readily configured,
asynchronous data communication solutions.
The 27128A offers four alternatives for signaling the
Series 500 when an incoming record is complete and
ready for processing.
• User-specifed single text terminators. The user can
specify up to eight characters and, with the quoting
mode, specify a terminator which should be inserted in
the text buffer without terminating the record.
• A user-specifed double text terminator.
• Activation of an interrupt mode which will signal the
Series 500 when new data is available.
• Expiration of a character counter.
Additional character recognition capabilities allow the
following features:
• automatic and conditional appendage of separators on
transmitted text,
• programmable prompt sequence detection and
• signal character checking.
The 27128A can ease real-time programming
requirements with the following:
• break detection and generation,
• a no-activity and lost receiver disconnect timer, and a
host
ENQ/ACK
timer.
7
Asynchronous 8-Channel Multiplex (UP 27130A)
The 27130A Asynchronous Multiplexer is an
economical solution for interfacing up to eight RS-232C or
RS-423A compatible devices to the Series 500 with a
single hardware interface. The 27130A can easily be
configured to support a wide range of terminals, printers
and other asynchronous devices.
Features
• ccm
V.I0/28, EIA RS-232C compatible.
• Supports simplex, echoplex or full-duplex mode
(asynchronous transmission only).
• Selection of data transmission attributes can be
performed independently on each channel.
• Local intelligence reduces time consumed by the CPU
during I/O transactions by offering edit functions,
special character recognition and handshake protocol
control.
• Parity, overrun and framing errors are sensed locally to
detect transmission errors.
• X-ONIX-OFF
(both directions) and
ENQ/ACK
(one
direction, host sending ENQ) handshaking.
Operation
Programmable attributes:
Baud rates ................ 110, 134.5, 150, 300, 600,
1200, 2400, 4800, 9600 or
19200
Parity . . . . . . . . . . . . . . . . . . . . Odd, even or none
Stop bits. . . . . . . . . . . . . . . . . . 1 or 2
Character size ............. 5, 6, 7 or 8 bits
Handshakes .............. ENQI ACK and
X-ON/X-OFF
Note: Not all data recognition features are supported for
continuous data transfer at 19200 baud.
The 27130A uses microprogrammed capabilities to
offer efficient, high performance device handling. The
interface buffers each channel with two 512 byte
memories for transmission and receiving. The intelligence
of the interface permits users to edit these memories and
use character recognition to insert or strip characters,
which results in a streamlined peripheral interface.
110 Expander (UP 97098A)
The HP 97098A I/O Expander is an external card cage
supported by the Series 500. It provides user access to the
second and third I/O Processors for additional I/O
interface card capacity. With the 97098A, you can access
an additional eight channels with Direct Memory Access
capability on each channel. Thus, two 97098A I/O
Expanders will increase the capacity to 20 user-available
I/O slots on the Model 520, and 23 on the Models 530 and
540, and 15 on Model 550 (with one additional 97098A).
Specifications
No. of I/O slots ............. 8
Line requirements .......... 90 - 132 Vac, 2.5 A max.
or
198 - 250 Vac, 2.5 A max.
Max. power dissipation . . . . . 180 watts
Input frequency. . . . . . . . .. .. 47 - 66 Hz
Dimensions:
Height ................... 7.4 in. (18.7 cm)
Width .................... 16.75 in. (42.5 cm)
Length ................... 19.85 in. (50.4 cm)
Cable length .............. 6 ft. (1.82m)
Note: There must be an additional I/OP for each Expander.
Limit =
2
I/OPs.