RCA Spectra 70 - Page 116

Diagnose
(DIG)
General Description
Format
(SI)
Privileged
Instructions
• The purpose of this privileged instruction is to store four additional
bytes
in the snapshot memory location table which will provide a means
for facilitating maintenance techniques on the 70/46 Processor. It is
provided
for the RCA Customer Service and Engineering Representatives
and cannot be used for a program debugging aid.
The mechanics of this instruction are implemented specifically for
the 70/46 Processor.
83
o
7 8
15 16 19 20
31
Note • Use of the Interval Timer and Diagnostic Snapshot by programs may
not occur together, since the counter register is common to both. If the
Diagnose function is initiated while the Interval Timer is running,
the shared counter is cleared to zero without occurrence of the Interval
Timer Interrupt and the Diagnose function assumes control of the
counter. If the function being diagnosed is the Load Interval Timer,
the actual loading of the counter is inhibited but the E. O. Flow
is Diagnosed.
107