00000000: D5 CE 2D CE C5 D7 20 28 38 29 0D 0D D4 48 49 53 |..-... (8)...HIS|
00000010: 20 57 49 4C 4C 20 42 52 49 4E 47 20 42 41 43 4B | WILL BRING BACK|
00000020: 20 41 20 C2 C1 D3 C9 C3 20 50 52 4F 47 52 41 4D | A ..... PROGRAM|
00000030: 20 41 46 54 45 52 20 41 20 CE C5 D7 20 43 4F 4D | AFTER A ... COM|
00000040: 4D 41 4E 44 20 48 41 53 20 42 45 45 4E 20 49 53 |MAND HAS BEEN IS|
00000050: 53 55 45 44 20 4F 52 20 45 56 45 4E 20 49 46 20 |SUED OR EVEN IF |
00000060: 54 48 45 20 43 4F 4D 50 55 54 45 52 20 48 41 53 |THE COMPUTER HAS|
00000070: 20 42 45 45 4E 20 52 45 53 45 54 2E 20 20 CF 46 | BEEN RESET. .F|
00000080: 20 43 4F 55 52 53 45 2C 20 49 54 27 53 20 49 4D | COURSE, IT'S IM|
00000090: 50 4F 52 54 41 4E 54 20 54 48 41 54 20 54 48 45 |PORTANT THAT THE|
000000A0: 20 C2 C1 D3 C9 C3 20 4D 45 4D 4F 52 59 20 48 41 | ..... MEMORY HA|
000000B0: 53 4E 27 54 20 42 45 45 4E 20 55 53 45 44 20 42 |SN'T BEEN USED B|
000000C0: 59 20 41 4E 4F 54 48 45 52 20 C2 C1 D3 C9 C3 20 |Y ANOTHER ..... |
000000D0: 50 52 4F 47 52 41 4D 20 4F 52 20 4F 54 48 45 52 |PROGRAM OR OTHER|
000000E0: 57 49 53 45 20 42 45 45 4E 20 4F 56 45 52 57 52 |WISE BEEN OVERWR|
000000F0: 49 54 54 45 4E 2E 20 20 C1 20 50 52 4F 4D 50 54 |ITTEN. . PROMPT|
00000100: 20 52 45 41 44 49 4E 47 20 22 C7 52 41 50 48 49 | READING ".RAPHI|
00000110: 43 53 20 53 43 52 45 45 4E 3F 20 28 D9 2F CE 29 |CS SCREEN? (./.)|
00000120: 22 20 57 49 4C 4C 20 41 50 50 45 41 52 2C 20 41 |" WILL APPEAR, A|
00000130: 4E 44 20 4E 4F 52 4D 41 4C 4C 59 20 59 4F 55 20 |ND NORMALLY YOU |
00000140: 53 48 4F 55 4C 44 20 41 4E 53 57 45 52 20 CE CF |SHOULD ANSWER ..|
00000150: 2E 0D 0D C8 4F 57 45 56 45 52 2C 20 49 46 20 59 |....OWEVER, IF Y|
00000160: 4F 55 20 52 45 53 45 54 20 54 48 45 20 43 4F 4D |OU RESET THE COM|
00000170: 50 55 54 45 52 20 57 48 49 4C 45 20 41 20 47 52 |PUTER WHILE A GR|
00000180: 41 50 48 49 43 53 20 53 43 52 45 45 4E 20 49 53 |APHICS SCREEN IS|
00000190: 20 41 4C 4C 4F 43 41 54 45 44 20 28 55 53 49 4E | ALLOCATED (USIN|
000001A0: 47 20 C7 D2 C1 D0 C8 C9 C3 20 31 2C 20 32 2C 20 |G ....... 1, 2, |
000001B0: 33 20 4F 52 20 34 29 20 54 48 45 52 45 20 57 49 |3 OR 4) THERE WI|
000001C0: 4C 4C 20 42 45 20 41 20 50 52 4F 42 4C 45 4D 2E |LL BE A PROBLEM.|
000001D0: 20 20 CE 4F 52 4D 41 4C 4C 59 2C 20 41 20 C2 C1 | .ORMALLY, A ..|
000001E0: D3 C9 C3 20 50 52 4F 47 52 41 4D 20 53 54 41 52 |... PROGRAM STAR|
000001F0: 54 53 20 41 54 20 4D 45 4D 4F 52 59 20 4C 4F 43 |TS AT MEMORY LOC|
00000200: 41 54 49 4F 4E 20 37 31 36 39 20 28 24 31 43 30 |ATION 7169 ($1C0|
00000210: 31 29 2C 20 42 55 54 20 57 48 45 4E 20 41 20 47 |1), BUT WHEN A G|
00000220: 52 41 50 48 49 43 53 20 53 43 52 45 45 4E 20 49 |RAPHICS SCREEN I|
00000230: 53 20 4F 50 45 4E 45 44 2C 20 54 48 45 20 50 52 |S OPENED, THE PR|
00000240: 4F 47 52 41 4D 20 49 53 20 4D 4F 56 45 44 20 54 |OGRAM IS MOVED T|
00000250: 4F 20 53 54 41 52 54 20 41 54 20 31 36 33 38 35 |O START AT 16385|
00000260: 20 28 24 34 30 30 31 29 2E 20 20 D7 48 45 4E 20 | ($4001). .HEN |
00000270: 54 48 45 20 43 4F 4D 50 55 54 45 52 20 49 53 20 |THE COMPUTER IS |
00000280: 52 45 53 45 54 2C 20 54 48 45 20 50 52 4F 47 52 |RESET, THE PROGR|
00000290: 41 4D 20 53 54 41 59 53 20 57 48 45 52 45 20 49 |AM STAYS WHERE I|
000002A0: 54 20 49 53 20 57 48 49 4C 45 20 54 48 45 20 50 |T IS WHILE THE P|
000002B0: 4F 49 4E 54 45 52 20 57 48 49 43 48 20 54 45 4C |OINTER WHICH TEL|
000002C0: 4C 53 20 54 48 45 20 57 48 45 52 45 20 54 48 45 |LS THE WHERE THE|
000002D0: 20 50 52 4F 47 52 41 4D 20 53 54 41 52 54 53 20 | PROGRAM STARTS |
000002E0: 49 53 20 4D 4F 56 45 44 20 42 41 43 4B 2E 20 20 |IS MOVED BACK. |
000002F0: D4 4F 20 43 4F 56 45 52 20 54 48 41 54 20 45 56 |.O COVER THAT EV|
00000300: 45 4E 54 55 41 4C 49 54 59 20 59 4F 55 20 57 49 |ENTUALITY YOU WI|
00000310: 4C 4C 20 42 45 20 41 53 4B 45 44 20 49 46 20 59 |LL BE ASKED IF Y|
00000320: 4F 55 20 57 41 4E 54 20 54 4F 20 52 45 2D 41 4C |OU WANT TO RE-AL|
00000330: 4C 4F 43 41 54 45 20 54 48 45 20 47 52 41 50 48 |LOCATE THE GRAPH|
00000340: 49 43 53 20 53 43 52 45 45 4E 20 42 45 46 4F 52 |ICS SCREEN BEFOR|
00000350: 45 20 41 54 54 45 4D 50 54 49 4E 47 20 54 4F 20 |E ATTEMPTING TO |
00000360: 52 45 43 4F 56 45 52 20 54 48 45 20 50 52 4F 47 |RECOVER THE PROG|
00000370: 52 41 4D 2E 20 20 C9 46 20 49 4E 20 44 4F 55 42 |RAM. .F IN DOUB|
00000380: 54 20 59 4F 55 20 53 48 4F 55 4C 44 20 54 52 59 |T YOU SHOULD TRY|
00000390: 20 52 45 43 4F 56 45 52 49 4E 47 20 59 4F 55 52 | RECOVERING YOUR|
000003A0: 20 50 52 4F 47 52 41 4D 20 57 49 54 48 4F 55 54 | PROGRAM WITHOUT|
000003B0: 20 41 4C 4C 4F 43 41 54 49 4E 47 20 54 48 45 20 | ALLOCATING THE |
000003C0: 47 52 41 50 48 49 43 53 20 53 43 52 45 45 4E 20 |GRAPHICS SCREEN |
000003D0: 41 4E 44 20 53 45 45 20 49 46 20 49 54 20 4C 49 |AND SEE IF IT LI|
000003E0: 53 54 53 20 50 52 4F 50 45 52 4C 59 2E 20 20 C9 |STS PROPERLY. .|
000003F0: 46 20 54 48 45 20 50 52 4F 47 52 41 4D 20 57 4F |F THE PROGRAM WO|
00000400: 4E 27 54 20 4C 49 53 54 2C 20 43 41 4E 20 42 45 |N'T LIST, CAN BE|
00000410: 20 4C 49 53 54 45 44 20 4F 4E 4C 59 20 49 4E 20 | LISTED ONLY IN |
00000420: 50 41 52 54 20 4F 52 20 54 55 52 4E 53 20 54 4F |PART OR TURNS TO|
00000430: 20 47 41 52 42 41 47 45 2C 20 54 48 45 4E 20 59 | GARBAGE, THEN Y|
00000440: 4F 55 20 43 41 4E 20 54 52 59 20 54 4F 20 53 50 |OU CAN TRY TO SP|
00000450: 45 43 49 46 59 20 47 52 41 50 48 49 43 53 20 53 |ECIFY GRAPHICS S|
00000460: 43 52 45 45 4E 20 28 41 4E 53 57 45 52 20 D9 C5 |CREEN (ANSWER ..|
00000470: D3 29 2E 0D 0D |.)... |
UN-NEW (8)..THIS WILL BRING BACK A BASIC
PROGRAM AFTER A NEW COMMAND HAS BEEN IS
SUED OR EVEN IF THE COMPUTER HAS BEEN RE
SET. OF COURSE, IT'S IMPORTANT THAT THE
BASIC MEMORY HASN'T BEEN USED BY ANOTHE
R BASIC PROGRAM OR OTHERWISE BEEN OVERWR
ITTEN. A PROMPT READING "GRAPHICS SCREE
N? (Y/N)" WILL APPEAR, AND NORMALLY YOU
SHOULD ANSWER NO...HOWEVER, IF YOU RESET
THE COMPUTER WHILE A GRAPHICS SCREEN IS
ALLOCATED (USING GRAPHIC 1, 2, 3 OR 4)
THERE WILL BE A PROBLEM. NORMALLY, A BA
SIC PROGRAM STARTS AT MEMORY LOCATION 71
69 ($1C01), BUT WHEN A GRAPHICS SCREEN I
S OPENED, THE PROGRAM IS MOVED TO START
AT 16385 ($4001). WHEN THE COMPUTER IS
RESET, THE PROGRAM STAYS WHERE IT IS WHI
LE THE POINTER WHICH TELLS THE WHERE THE
PROGRAM STARTS IS MOVED BACK. TO COVER
THAT EVENTUALITY YOU WILL BE ASKED IF Y
OU WANT TO RE-ALLOCATE THE GRAPHICS SCRE
EN BEFORE ATTEMPTING TO RECOVER THE PROG
RAM. IF IN DOUBT YOU SHOULD TRY RECOVER
ING YOUR PROGRAM WITHOUT ALLOCATING THE
GRAPHICS SCREEN AND SEE IF IT LISTS PROP
ERLY. IF THE PROGRAM WON'T LIST, CAN BE
LISTED ONLY IN PART OR TURNS TO GARBAGE
, THEN YOU CAN TRY TO SPECIFY GRAPHICS S
CREEN (ANSWER YES)...
×
C64 Image
> CLICK IMAGE PREVIEW FOR FULL MODAL