High-Speed Hp-Ib - HP 340 Series Service Manual

010
x
010
Registers
System
Protocol
Controller
o
-.
Figure 3-14. SCSI Block Diagram
Self-tests for SCSI are explained in Chapter 4 and 5.
High-Speed HP-IB
Overview
SCSI
- - - - - -
....
Bus
The high-speed HP-IB interface option is functionally identical to the HP 98625B card. It allows
word wide transfers during DMA cycles and is fully supported by software. Because of limited
space, the circuits are implemented on the video board instead of the SCSI circuits when the
hil?;h-speed HP-IB option is ordered.
A picture of the video/high-speed HP-IB board is shown in Figure 3-15. A block diagram is
shown in Figure 3-16.
The optional high-speed HP-IB interface configuration is fixed as follows:
• Select Code 14.
• Interrupt Level 4.
• Systelm Controller.
• High-Speed.
Figure 3-15. HP 98625A High-Speed HP-IB Interface Card
Functional Description
67