ALTERNATE FORMAT:
PRINT#15,"M-E"CHR$«address)CHR$(>address)
EXAMPLE:
Here
is
a MEMORY-EXECUTE command that does absolutely nothing. The first
instruction it executes is an RTS, which ends the command:
PRINT#15, "M-E"CHR$(179)CHR$(242)
A more plausible use for this command would be to artificially trigger
an
error message.
Don't forget to check the error channel, or you'll miss the message:
PRINT#15,"M-E"CHR$(201)CHR$(239)
However, most uses require intimate knowledge
of
the inner workings of the DOS, and
preliminary setup with other commands, such
as
MEMORY-WRITE.
BLOCK-EXECUTE
This rarely-used command will load a sector containing a machine language routine
into a memory buffer from diskette, and execute it from the first location within the
buffer, until a RETURN from Subroutine (RTS) instruction ends the command.
FORMAT FOR THE BLOCK-EXECUTE COMMAND:
PRINT#15,"B-E:";channel #;drive #;track #;sector #
where "channel
#"
is
the channel number specified when the
file
into which the block
will be loaded was opened, "drive
#"
is
the drive number, and "track
#"
and "sector
#"
are respectively the track and sector numbers containing the desired block
of
data to
be loaded into the file buffer and executed there.
ALTERNATE FORMATS:
PRINT#15, "B-E:";channel #;drive #;track #;sector #
PRINT#15, "B-E:channel #,drive
#,track
#,sector
#"
78
To Next Page
Loading...
