Programming instructions

Chapter 1 25
Product Information
Rear Panel Components
Audio Connectors
The B2000 workstation has audio-input and -output capabilities through external input
and output connectors on the rear panel and through an internal speaker. The sound is
16-bit, 44 kHz (CD-quality).
As shown in Figure 1-6, the workstation’s rear panel contains four audio connectors: Line
In, Line Out, Microphone In, and Headphones Out.
Figure 1-6. Audio Connectors
The audio connectors are standard stereo audio mini-jacks. Hewlett-Packard recommends
using gold-plated plugs available through audio retailers for best quality recording and
playback through the external connectors.
Table 1-5 summarizes the audio electrical specifications for the B2000 workstation.
TOC Button
The TOC (transfer of control) button interrupts the system and transfers control from the
default device to an auxiliary device. A transfer of control saves the state of the processor
in Processor Internal Memory (PIM) and begins execution of recovery software at a
nonzero location specified by a special location in Page Zero called MEM_TOC. The TOC
code is protected by a checksum.
Table 1-5. Audio Electrical Specifications
Frequency Response 25 Hz to 20 kHz
Input Sensitivity/Impedance:
Line In
Microphone In
2.8Vp-p/10Kohm
40mVp-p/47Kohm
Maximum Output Level/Impedance:
Line Out
Headphones Out
2.8Vp-p/920ohm
5.6Vp-p/110ohm
Line In
Line Out
Microphone In
Headphones Out