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OPERATING INSTRUCTIONS
CHAPTER 3 - OPERATING INSTRUCTIONS
3.1 INTRODUCTION
This chapter provides necessary information to use the MVME135/136
in a system configuration.
This
includes
switches,
operating
controls,
indicators,
and
memory
map
details
found
on
the
MVME135/136 microcomputer.
3.2 FRONT PANEL
The MVME135/136's front panel is illustrated in Figure 3-1.
As
shown, the red and green LED indicators (FAIL, HALT, and RUN) are
located on the front panel. Located below the LED indicators are the
two pushbutton switches ABORT (51) and RESET (52).
The next two
slots are cutouts for accessing the eight-position DIP switch 53 and
the ten-position DIP switch
S4.
This is followed by the slots for
the two OB-9 connectors for Serial Ports 1 and 2.
3.2.1 LED Indicators
The MVME135/136 has three LED indicators: FAIL, HALT, and RUN. They
are described below.
Table 3-1 provides the MVME135/136 module
status for all possible combinatior.s of these LEOs.
The FAIL indicator (051) is a discrete red LED that indicates the
status of the BOFAIL software bit.
The HALT indicator (052) is a discrete red LED that indicates when
the halt line of the MPU is asserted. The HALT indicator may flicker
as a result of normal CPU operation.
The RUN indicator (053) is a discrete green LED that indicates when
the MC68020 address strobe is active.
3.2.2 ABORT Switch (51)
The ABORT switch is a momentary type switch that when pressed,
causes a Group 3 Level 7 interrupt to the MC68020 processor.
The
135bug MVME135/136 Debug Monitor, treats ABORT as a low level reset.
The resul t bei ng a di spl ay of the MC68020 regi sters and/or return of
the program control to 135bug.
3.2.3 RESET Switch (52)
The RESET switch is a momentary type switch that when pressed,
causes a reset to occur locally.
If the MVME135/136 is the system
controller (see 54-1), a VMEbus system reset will also occur.
3-1
•
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