Technical data
Table Of Contents
- Technical Reference Manual for OEMs HP Models 743, 744, and 748
- Contents
- 1 General Information
- Model 743 and Model 744 VME Board Computers
- Product Description
- Supported Configurations
- Model 743 and Model 744 External Devices
- Keyboard and Mouse
- Model 743 and Model 744 Cables
- Model 743 and Model 744 Functional Description
- Model 744 Block Diagram
- CPU Circuit
- Boot ROM Circuit
- Graphics Circuit
- Model 743 Memory Controller Circuit
- Model 744 Memory Controller Circuit
- LED Displays
- I/O Controller ASIC
- VME Controller ASIC
- I/O Expansion
- I/O Expansion Block Diagrams
- Model 748 Ruggedized Workstation
- Model 743 and Model 744 VME Board Computers
- 2 References
- 3 Quality
- 4 Mechanical Information
- 5 Electrical Information
- Video Connector Pinouts
- Audio Connector Pinouts
- HP Parallel Connector Pinouts
- RS-232 Connector Pinouts
- AUI LAN Connector Pinouts
- Single-Ended SCSI Connector Pinouts
- FW SCSI Connector Pinout
- PS/2 Connector Pinouts
- VME Connector Pinouts
- Real-Time Clock (RTC) Battery Information
- Video Output Signal Specifications
- Video Timing Specifications
- 6 Power Requirements
- 7 Product Design Considerations
- Index
1-9
General Information
Model 743 and Model 744 VME Board Computers
Model 743 and Model 744 External Devices
The Model 743 and Model 744 support the following external devices:
• LAN Transceiver (Medium Attachment Unit)
HP 28641B ThinLAN Ethernet Transceiver (order number A2670A)
HP 28685B Ethertwist Transceiver (order number A2671A)
HP 28683A Fiber Optic Hub/Transceiver
• Speaker: 8 ohm impedance with
1
/
8
-inch sub-miniature stereo connector
• Single-ended SCSI through the onboard SE SCSI adapter
Keyboard and Mouse
The Model 743 and Model 744 support the mouse with mini-DIN connector (PS/2) and key-
board with mini-DIN connector (PS/2) included in the HP A4030D Localization Kit.
Model 743 and Model 744 Cables
Table 1-5 and Table 1-6 show the part numbers for standard cables and conversion cables
used to interface with the Model 743 and Model 744 I/O backplanes.
Drawings showing mechanical and electrical characteristics for these cables are available.
Refer to chapter 4 in this manual for more information.
Conversion cables provide a way to connect a standard cable to the high-density connectors
on the Model 743 and Model 744 front panels.
All conversion cables, except the A4167A, are 762 plus/minus 30mm (30 plus/minus 1.18
inch) long. The A4167A cable is 250 mm (10 inches) long.
Table 1-5 Model 743 and Model 744 Standard Cables
Product
Number
Interface Cable Type
HP 24524G RS-232 3-meter terminal cable; 9-pin female to 25-pin male
HP 24524H RS-232 3-meter modem cable; 9-pin female to 25-pin female
HP C2950A HP Parallel DB 25-pin male to 36-pin Centronics male
HP 92284A HP Parallel DB 25-pin male to 25-pin male
HP K2296 SCSI-2
0.9 meter high-density 50-pin to standard bail lock
a
a.Additional lengths are available.