ZiLOG System 8000 User Manual

USER
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Zilog
USER
2. The program should not be timing-dependent because
there will be some timing distortion each time the
breakpoint is encountered.
3. The user program must not use Channel 3 of the
Z80A Counter Timer Circuit (CTC), because it is
used to implement the multiple execution feature.
4. The breakpoint cannot be within an interrupt pro-
cedure entered by an interrupt from Channels 0
through 2 of the Z80A CTC.
The BREAK and the NEXT commands use instruction modification
and the interrupt system. Therefore, the program being
debugged cannot be in the PROM area and cannot involve
modifications of the interrupt status.
Any set breakpoints must be cleared before a new program is
loaded from the S8000; otherwise, previously set breakpoints
continue to operate on the new program during debugging.
The user stack is used whenever a JUMP or GO command is exe-
cuted. The command must be set to some address within writ-
able memory. If the JUMP or GO address has a system break-
point set, the execution of the instruction immediately fol-
lowing the JUMP or GO does not cause suspension of execu-
tion. Subsequent executions suspend the breakpoint to per-
mit breaking and continuing execution without resetting the
breakpoint. .
3.3 Moniter Program
The following conventions are used in command descriptions:
< > Angle brackets enclose descriptive names for the
quantities to be entered.
Square brackets denote optional quantities.
A bar denotes an OR condition. For example, WIB
means either w or B can be used.
Underscore indicates user input.
(CR) Return and line feed.
Apply the following when entering commands and options:
1. All commands and options must be entered in upper-
case.
Zilog
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ZiLOG System 8000 Specifications

General

Brand	ZiLOG
Model	System 8000
Category	Desktop
Language	English