Commodore 128D - Page 316

STASH
STEP
STOP
SWAP
SYS
—Move contents of host memory to expansion RAM
STASH #bytes, intsa, expsa, expb
Refer to FETCH command for description of parameters.
—See FOR/TO/STEP/NEXT
—Halt program execution
STOP
This statement halts the program. A message, BREAK IN LINE XXX,
occurs (only in program mode), where XXX is the line number con
taining the STOP command. The program can be restarted at the
statement following STOP if the CONT command is used immedi
ately, without any editing occurring in the listing. The STOP state
ment is often used while debugging a program.
—Swap contents of host RAM with contents of expansion RAM
SWAP #bytes, intsa, expsa, expb
Refer to FETCH command for description of parameters.
—Call and execute a machine language subroutine at the specified
address
SYS address [,[a] [,[x] [,[y] [,s]ffl
This statement performs a call to a subroutine at a given address in a
memory configuration set up according to the BANK command.
Optionally, arguments a,x,y and s are loaded into the accumulator, x,
y and status registers, respectively before the subroutine is called.
See BANK.
The address range is 0 to 65535. The program begins executing the
machine-language program starting at that memory locatfon. If the
machine language routine returns control (via RTS), BASIC execution
continues after the SYS command.
EXAMPLES:
SYS 40960 Calls and executes the machine-language routine at
location 40960.
SYS 8192,0 Calls and executes the machine-language routine at
location 8192 and load zero into the accumulator.
See RREG command to pick up register contents after a SYS call.
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BASIC 7.0 ENCYCLOPEDIA—Basic Commands and Statements