HP Model 712/100 hp 9000 series 700 model 712 technical reference manual (a261 - Page 12

Built-In Interfaces, HP 28641B ThinLAN Transceiver, HP 30241A 10Base4 ThickLAN MAU - adapter cable

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Built-In Interfaces 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 127kΩ 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. Table 1-3.Supported AUI LAN Adapters and Devices LAN Adaptor HP 28641B ThinLAN Transceiver HP 30241A 10Base4 ThickLAN MAU Network Devices HP 28692A ThinLAN Hub Plus HP 28673A 10:10 LAN Bridge HP 28683A Fiber Optic Transceiver Model 712 Technical Reference General Information 1-3

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1-3
M±de0 712 Tech²ica0 Refe5e²ce
Ge²e5a0 I²f±5³a´i±²
Built-In Interfaces
System Board Interfaces
The 6<6´e³ b±a5d'6 b8i0´-i² i²´e5face6 ha9e 4±5´6 ±² ´he c±²²ec´±5 4a²e0.
PS/2 Keyboard and Mouse Interfaces
The5e a5e ´:± PS/2 6´<0e 6e5ia0 4±5´6µ ±²e PS/2 ¶e<b±a5d 4±5´ a²d ±²e PS/2 ³±86e 4±5´.
HP Parallel Interface
The 4a5a00e0 4±5´ i6 c±³4a´ib0e :i´h PS/2 6´a²da5d6, 4086 6±³e addi´i±²a0 fea´85e6 f±8²d i² HP
Se5ie6 7·· :±5¶6´a´i±²6. The ba6ic PS/2 6844±5´6 a bi-di5ec´i±²a0 5egi6´e5 ³±de0 i²´e5face i²
addi´i±² ´± 45i²´e5 ±²0< DMA. The5e i6 6844±5´ f±5 b±´h ±f ´he6e fea´85e6 i² addi´i±² ´±
45±9idi²g ´he addi´i±²a0 45i²´e5 DMA ha²d6ha¶e6 f±8²d ±² Se5ie6 7·· :±5¶6´a´i±²6. The
5egi6´e5 ³±de0 i²´e5face :i00 be ab0e ´± 6844±5´ ´he ²e: "Bi´5±²ic6" 45i²´e5 i²´e5face. The
Se5ie6 7·· Sca²je´ i²´e5face :i00 ²±´ be 6844±5´ed.
RS–232 Serial Interface.
The5e :i00 be ±²e PS/2 ´<4e 6e5ia0 i²´e5face. Thi6 6´a²da5d i²´e5face i6 ba6ed ±² a ¸-4i²
D-68b c±²²ec´±5 a²d 6844±5´6 CTS/RTS ha5d:a5e ha²d6ha¶i²g.
Thi6 4±5´ i6 ba6ed ±² ´he
Na´i±²a0 1¹ºº· 6e5ia0 i²´e5face chi4.
Small Computer Systems Interface (SCSI–2)
The b8i0´-i² SCSI-2 4±5´ i6 i³40e³e²´ed 86i²g a² NCR71· ³ac5±ce00 i²6ide ´he I/O ASIC
chi4. Thi6 »-bi´ 6i²g0e e²ded i³40e³e²´a´i±² i6 c±³4a´ib0e :i´h ´he c855e²´ 7·· 6e5ie6
45±d8c´6 a²d 6844±5´6 º MB/6ec da´a ´5a²6fe5 5a´e6.
The SCSI b86 i6 ´e5³i²a´ed ´± 3.3 9±0´6 ´h5±8gh 127¶
Ω
±² ´he CPU b±a5d. The ´e5³i²a´±5
³86´ be 5e³±9ed f5±³ ´he i²´e5²a0 di6¶ d5i9e. If a² e;´e5²a0 di6c d5i9e i6 86ed a² ac´i9e
´e5³i²a´±5 ³86´ be 86ed ±² ´he d5i9e a´ ´he e²d ±f ´he cab0e.
Local Area Network Interface.
The IEEE »·2.3 E´he5²e´ L±ca0 A5ea Ne´:±5¶ (LAN) ci5c8i´ 45±9ide6 b±´h ´he AUI i²´e5face
f±5 c±²9e²´i±²a0 c±a;ia0 E´he5²e´ a²d a di5ec´ i²´e5face ´± a ´:i6´ed 4ai5 (TP) 1·BASE-T
²e´:±5¶. O²0< ±²e i²´e5face ca² be 86ed a´ a ´i³e, ´he 6<6´e³ a8´±-6e0ec´6 ´he c±55ec´ 4±5´
´ha´ i6 bei²g 86ed. E´he5²e´ i6 a 1· Mbi´/6 4ac¶e´-6:i´ched 6e5ia0 i²´e5face e³40±<i²g Ca55ie5
Se²6e M80´i40e Acce66/C±00i6i±² De´ec´i±² (CSMA/CD). Tab0e 1-3 0i6´6 ´he 6844±5´ed LAN
ada4´e56 a²d ±´he5 ²e´:±5¶ de9ice6.
Table 1-3.
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