May June 1980 - Commodore Computers

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116 COMPUTE. MAY/JUNE, I JUNE. 1980. ISSUE 4.
OFOO. If the circled number is 04 in
the original Monitor, that value in the
copy should be changed to OC. . Likewise,
05 changes to OD, 06 to OE,
and 07 to OF. Figure 3 shows the first
128 locations in the copy after changes
have been made.
have been made.
c. To makem the changes, list a section of
copy with the M command, as in
M 0C00 OCOO 0C7F OC7F
which prints the first 128 bytes in 16
rows. Next, use the cursor controls to
position the cursor over the value to be
changed, type the corrected value, and
press RETURN. Even if several values
in a line are changed, you only need to
press RETURN once per line. Repeat
the procedure until all 84 changes are
made.
d. d . For insurance, save a copy of your new
3k Monitor before testing it.
S 01.3K 01,3K MONITOR 3087,0C00,0F6B
3087,OCOO,OF6B
is the command to use. To be on the
safe side, make several copies on the
tape. Rewind this tape, mark it "3k
Monitor", , and set it aside.
5. Now test your 3k Monitor, to make sure it
works correctly. Type X, then RETURN to
get out of the original Monitor. TypeT SYS
3087, then RETURN, , to transfer control to
the 3k Monitor. Tryout the features
described for the Monitor in your manual.
When you are confident that you have created a
working Monitor at the 3k point, you are ready to
make as many working copies in other locations
as you have memory to accommodate. If you have a
full 32k, you may use all the procedures below
exactly as written. Otherwise, just delete (or ignore)
references to locations beyond the end of your RAM.
Here is the procedure:
1. LOAD the 3k Monitor. Rewind and remove
the cassette.
2. Put the original Monitor tape in the cassette
unit, , and do step 2 of the earlier process.
3. POKE 636,28:POKE 638,31 :SYS 62403.
This puts a copy of the original Monitor
in memory starting at 7168 ($ICOO).
(SlCOO).
4. POKE 135,12. . This tells your PET that
end-of-memory is just below 3k, so the
BASIC program described below will not
mess up your Monitor.
5. Type NEW and press RETURN. This is
very important!
6. Type in and run the following program,
which will create working copies of the
Monitor at the high end of every 4k incre­
Monitor at the high end of every 4k incre
ment of memory.
MONITOR MULTIPLE
RELOCATOR
i
i 10 REM F~ E r'l MONITOR 1'10N I MULTIPLE f'l T I F'LE RELOCRTOR
F:ELOCATOF;
20 2~) PEN F~ E M COPYRIGHT COP'T'R I NQV ~lO"'·J 197? 1979 BY f:'T'
30 ~:ft REM REN
ROV RO'T' BU5DIECKER
BUS!I I ECKEF;
40 413 REM REI"
MICRO r'1 I SOFTWHRE '30FHIARE SVSTEMS S,,'STH1S
56 513 REM F:Ef1
P.O. BOX 1442
60 REM REr-1
NOODSRIDGE. HOODBF: . VR '·/A 22193
~:
?U 70 REM REN FILL ALL RIGHTS RESERVED
80 :
91:::1 ~< = 6
1130 100 K= 1024 11324 : M1 r'1 1 =5072 =3072 ■: M2=7168 !'12=7168 : K4=4*K
1101 1tl F0RI=0TO875
FORI =£IT0875
12'3 13 C1=PEEK