artisan HP 700 Series, Техническое справочное руководство

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1-3 Model 712 Technical Reference General Information
System Board Interfaces
The system board's built-in interfaces have ports on the connector panel.
PS/2 Keyboard and Mouse Interfaces
There are two PS/2 style serial ports: one PS/2 keyboard port and one PS/2 mouse port.
HP Parallel Interface
The parallel port is compatible with PS/2 standards, plus some additional features found in HP
Series 700 workstations. The basic PS/2 supports a bi-directional register model interface in
addition to printer only DMA. There is support for both of these features in addition to
providing the additional printer DMA handshakes found on Series 700 workstations. The
register model interface will be able to support the new "Bitronics" printer interface. The
Series 700 Scanjet interface will not be supported.
RS–232 Serial Interface.
There will be one PS/2 type serial interface. This standard interface is based on a 9-pin
D-sub connector and supports CTS/RTS hardware handshaking. This port is based on the
National 16550 serial interface chip.
Small Computer Systems Interface (SCSI–2)
The built-in SCSI-2 port is implemented using an NCR710 macrocell inside the I/O ASIC
chip. This 8-bit single ended implementation is compatible with the current 700 series
products and supports 5 MB/sec data transfer rates.
The SCSI bus is terminated to 3.3 volts through 127k
Ω
on the CPU board. The terminator
must be removed from the internal disk drive. If an external disc drive is used an active
terminator must be used on the drive at the end of the cable.
Local Area Network Interface.
The IEEE 802.3 Ethernet Local Area Network (LAN) circuit provides both the AUI interface
for conventional coaxial Ethernet and a direct interface to a twisted pair (TP) 10BASE-T
network. Only one interface can be used at a time, the system auto-selects the correct port
that is being used. Ethernet is a 10 Mbit/s packet-switched serial interface employing Carrier
Sense Multiple Access/Collision Detection (CSMA/CD). Table 1-3 lists the supported LAN
adapters and other network devices.
Supported AUI LAN Adapters and Devices
LAN Adaptor Network Devices
HP 28641B ThinLAN Transceiver
HP 30241A 10Base4 ThickLAN MAU
HP 28692A ThinLAN Hub Plus
HP 28673A 10:10 LAN Bridge
HP 28683A Fiber Optic Transceiver