Zenith Z-100 Reference Manual page 27

Page 2.10
System Operating Features
Command: Execute (Go)
Syntax: G[ =addressl [b
Purpose: Initiates program execution with up to eight breakpoints. When a break-
point is encountered, the routine saves the processor status for the R and G
commands and displays the microprocessor register contents.
Example: G
=5000: 3ACD,4BCD RRTURIV
In this example, the computer will attempt to execute the commands beginning
at 53ACD. If location 54BCD is executed the program will stop and the contents
of the user registers will be shown. Entering just G will cause the program to
pick up where it left off with no breakpoints.
Command: Hexadecimal Math
Syntax: Hhexadeeiual value, hexadecimal value
Purpose: Performs hexadecimal arithmetic on the two hexadecimal values. Returns
the sum and the difference.
Example: H43C7, 99FA RETURIV
In this example, the computer will display the following:
Command: Input from Port
Syntax: lpor t
Purpose: Returns the contents of the specified port.
Example: 13FE RRTVRN
In this example, the computer will return the contents of input port 3FEH.
reakpoi n t].
. .
Sum: DDC1 Diff: A9CD
0