HIDDEN RAM(+24K)
FILE INFORMATION
FILENAME(S): HIDDEN RAM(+24K)
FILE TYPE(S): PRG
FILE SIZE: 1.3K
FIRST SEEN: 2025-11-30 21:23:18
APPEARS ON: 1 disk(s)
FILE HASH
999d516504263ccfe53aefa46be59cc28aa27af6da555fccd333511ecb768014
FOUND ON DISKS (1 DISKS)
| DISK TITLE | FILENAME | FILE TYPE | COLLECTION | TRACK | SECTOR | ACTIONS |
|---|---|---|---|---|---|---|
| C64 HULP 22 2 | HIDDEN RAM(+24K) | PRG | DuncanTwain | 35 | 7 | DOWNLOAD FILE |
FILE CONTENT & ANALYSIS
> DETECTED: COMMODORE BASIC PROGRAM (LOAD ADDRESS $0801)
00000000: 01 08 41 08 64 00 41 B2 33 20 20 20 20 20 20 20 |..A.d.A.3 |
00000010: 20 20 20 20 20 20 20 20 3A 8F 20 20 50 55 54 20 | :. PUT |
00000020: 44 45 53 49 52 45 44 20 44 41 54 41 20 42 59 54 |DESIRED DATA BYT|
00000030: 45 20 49 4E 20 56 41 52 49 41 42 4C 45 20 22 41 |E IN VARIABLE "A|
00000040: 22 00 87 08 6E 00 41 44 B2 34 35 30 30 30 20 20 |"...n.AD.45000 |
00000050: 20 20 20 20 20 20 20 20 3A 8F 20 20 57 45 27 4C | :. WE'L|
00000060: 4C 20 53 41 56 45 20 22 41 22 20 41 54 20 4C 4F |L SAVE "A" AT LO|
00000070: 43 20 34 35 30 30 30 20 28 49 4E 20 4D 41 53 4B |C 45000 (IN MASK|
00000080: 45 44 20 52 41 4D 29 00 A7 08 78 00 97 20 41 44 |ED RAM)...x.. AD|
00000090: 2C 41 20 20 20 20 20 20 20 20 20 3A 8F 20 20 53 |,A :. S|
000000A0: 41 56 45 20 22 41 22 00 F4 08 82 00 4D 53 B2 34 |AVE "A".....MS.4|
000000B0: 39 31 35 32 20 20 20 20 20 20 20 20 20 20 3A 8F |9152 :.|
000000C0: 20 20 4D 41 43 48 49 4E 45 20 43 4F 44 45 20 57 | MACHINE CODE W|
000000D0: 49 4C 4C 20 42 45 20 4C 4F 41 44 45 44 20 53 54 |ILL BE LOADED ST|
000000E0: 41 52 54 49 4E 47 20 41 54 20 4C 4F 43 2E 20 34 |ARTING AT LOC. 4|
000000F0: 39 31 35 32 00 1F 09 8C 00 8B 20 34 30 39 35 39 |9152...... 40959|
00000100: B3 41 44 20 AF 20 41 44 B3 34 39 31 35 32 20 A7 |.AD . AD.49152 .|
00000110: 20 42 4C B2 35 34 3A 20 CB 20 A4 20 31 39 30 00 | BL.54: . . 190.|
00000120: 63 09 91 00 8F 20 20 20 20 20 20 20 20 20 20 20 |c.... |
00000130: 20 20 20 20 20 20 20 20 20 20 4C 4F 43 41 54 49 | LOCATI|
00000140: 4F 4E 20 31 20 57 49 4C 4C 20 43 4F 4E 54 41 49 |ON 1 WILL CONTAI|
00000150: 4E 20 42 4C 4F 43 4B 20 50 4F 49 4E 54 45 52 2C |N BLOCK POINTER,|
00000160: 20 42 4C 00 A0 09 96 00 8F 20 20 20 20 20 20 20 | BL...... |
00000170: 20 20 20 20 20 20 20 20 20 20 20 20 20 20 42 4C | BL|
00000180: 3D 35 34 20 2D 2D 20 42 41 53 49 43 20 49 4E 54 |=54 -- BASIC INT|
00000190: 45 52 50 52 45 54 45 52 20 52 4F 4D 20 4F 55 54 |ERPRETER ROM OUT|
000001A0: 00 CB 09 A0 00 8B 20 35 33 32 34 37 B3 41 44 20 |...... 53247.AD |
000001B0: AF 20 41 44 B3 35 37 33 34 34 20 A7 20 42 4C B2 |. AD.57344 . BL.|
000001C0: 35 31 3A 20 CB 20 A4 20 31 39 30 00 00 0A A5 00 |51: . . 190.....|
000001D0: 8F 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. |
000001E0: 20 20 20 20 20 20 42 4C 3D 20 35 31 20 2D 2D 20 | BL= 51 -- |
000001F0: 49 2F 4F 20 52 4F 55 54 49 4E 45 53 20 4F 55 54 |I/O ROUTINES OUT|
00000200: 00 2B 0A AA 00 8B 20 35 37 33 34 33 B3 41 44 20 |.+.... 57343.AD |
00000210: AF 20 41 44 B3 B2 36 35 35 33 35 20 A7 20 42 4C |. AD..65535 . BL|
00000220: B2 35 33 3A CB 20 A4 20 31 39 30 00 60 0A AF 00 |.53:. . 190.`...|
00000230: 8F 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. |
00000240: 20 20 20 20 20 20 20 20 42 4C 3D 20 35 33 20 2D | BL= 53 -|
00000250: 2D 20 4B 45 52 4E 41 4C 20 52 4F 4D 20 4F 55 54 |- KERNAL ROM OUT|
00000260: 00 92 0A B4 00 42 4C B2 20 35 35 20 20 20 20 20 |.....BL. 55 |
00000270: 20 20 20 20 20 20 3A 8F 20 20 57 49 54 48 49 4E | :. WITHIN|
00000280: 20 4E 4F 52 4D 41 4C 20 42 41 53 49 43 20 41 52 | NORMAL BASIC AR|
00000290: 45 41 00 C2 0A BE 00 83 20 31 36 32 2C 30 30 2C |EA...... 162,00,|
000002A0: 31 33 34 2C 31 20 3A 8F 20 20 4D 41 43 48 49 4E |134,1 :. MACHIN|
000002B0: 45 20 4C 41 4E 47 55 41 47 45 20 52 4F 55 54 49 |E LANGUAGE ROUTI|
000002C0: 4E 45 00 ED 0A C8 00 83 20 31 37 34 2C 30 30 30 |NE...... 174,000|
000002D0: 2C 30 30 30 30 2C 31 33 34 2C 32 35 31 2C 31 36 |,0000,134,251,16|
000002E0: 32 2C 35 35 2C 31 33 34 2C 31 2C 39 36 00 1A 0B |2,55,134,1,96...|
000002F0: D2 00 81 20 49 B2 30 20 A4 20 31 33 20 20 20 20 |... I.0 . 13 |
00000300: 20 3A 8F 20 20 4C 4F 4F 50 20 46 4F 52 20 42 41 | :. LOOP FOR BA|
00000310: 53 49 43 20 4C 4F 41 44 45 52 00 4F 0B DC 00 87 |SIC LOADER.O....|
00000320: 20 4D 4C 20 20 20 20 20 20 20 20 20 20 20 3A 8F | ML :.|
00000330: 20 20 47 45 54 20 4E 45 58 54 20 42 59 54 45 20 | GET NEXT BYTE |
00000340: 4F 46 20 4D 2E 4C 2E 20 52 4F 55 54 49 4E 45 00 |OF M.L. ROUTINE.|
00000350: 7F 0B E6 00 97 20 28 4D 53 AA 49 29 2C 4D 4C 20 |..... (MS.I),ML |
00000360: 20 20 20 3A 8F 20 20 50 55 54 20 4D 2E 4C 2E 20 | :. PUT M.L. |
00000370: 42 59 54 45 20 49 4E 54 4F 20 50 4C 41 43 45 00 |BYTE INTO PLACE.|
00000380: 85 0B F0 00 82 00 CC 0B FA 00 97 28 4D 53 AA 31 |...........(MS.1|
00000390: 29 2C 42 4C 20 20 20 20 20 3A 8F 20 20 53 54 4F |),BL :. STO|
000003A0: 52 45 20 42 4C 4F 43 4B 20 50 4F 49 4E 54 45 52 |RE BLOCK POINTER|
000003B0: 20 49 4E 20 32 4E 44 20 42 59 54 45 20 4F 46 20 | IN 2ND BYTE OF |
000003C0: 4D 2E 4C 2E 20 52 4F 55 54 49 4E 45 00 0A 0C 04 |M.L. ROUTINE....|
000003D0: 01 48 41 B2 B5 28 41 44 AD 32 35 36 29 20 20 20 |.HA..(AD.256) |
000003E0: 20 3A 8F 20 20 48 49 47 48 2D 4F 52 44 45 52 20 | :. HIGH-ORDER |
000003F0: 42 59 54 45 20 4F 46 20 4D 41 53 4B 45 44 2D 52 |BYTE OF MASKED-R|
00000400: 41 4D 20 41 44 44 52 45 53 53 00 36 0C 0E 01 4C |AM ADDRESS.6...L|
00000410: 41 B2 41 44 AB 32 35 36 AC 48 41 20 20 20 20 20 |A.AD.256.HA |
00000420: 20 3A 8F 20 20 4C 4F 57 2D 4F 52 44 45 52 20 20 | :. LOW-ORDER |
00000430: 20 22 20 20 20 22 00 6D 0C 18 01 97 20 4D 53 AA | " ".m.... MS.|
00000440: 35 2C 4C 41 20 20 20 20 20 20 3A 8F 20 20 50 55 |5,LA :. PU|
00000450: 54 20 41 44 44 52 45 53 53 45 53 20 49 4E 54 4F |T ADDRESSES INTO|
00000460: 20 4D 2E 4C 2E 20 52 4F 55 54 49 4E 45 00 7B 0C | M.L. ROUTINE.{.|
00000470: 22 01 97 20 4D 53 AA 36 2C 48 41 00 A5 0C 2C 01 |".. MS.6,HA...,.|
00000480: 97 20 35 36 33 33 33 2C 31 32 37 20 20 20 20 3A |. 56333,127 :|
00000490: 8F 20 20 44 49 53 41 42 4C 45 20 49 4E 54 45 52 |. DISABLE INTER|
000004A0: 52 55 50 54 53 00 D2 0C 36 01 9E 28 4D 53 29 20 |RUPTS...6..(MS) |
000004B0: 20 20 20 20 20 20 20 20 20 20 3A 8F 20 20 45 58 | :. EX|
000004C0: 45 43 55 54 45 20 4D 2E 4C 2E 20 52 4F 55 54 49 |ECUTE M.L. ROUTI|
000004D0: 4E 45 00 FE 0C 40 01 97 20 35 36 33 33 33 2C 31 |NE...@.. 56333,1|
000004E0: 32 39 20 20 20 20 3A 8F 20 20 52 45 2D 45 4E 41 |29 :. RE-ENA|
000004F0: 42 4C 45 20 49 4E 54 45 52 52 55 50 54 53 00 28 |BLE INTERRUPTS.(|
00000500: 0D 4A 01 41 B2 C2 28 32 35 31 29 20 20 20 20 20 |.J.A..(251) |
00000510: 20 20 3A 8F 20 20 52 45 41 44 20 54 48 45 20 44 | :. READ THE D|
00000520: 41 54 41 20 42 59 54 45 00 2F 0D 54 01 99 41 00 |ATA BYTE./.T..A.|
00000530: 35 0D 5E 01 80 00 00 00 |5.^..... |
..A.D.A.3 :. PUT DESIRED
DATA BYTE IN VARIABLE "A"...N.AD.45000
:. WE'LL SAVE "A" AT LOC 45000
(IN MASKED RAM)...X.. AD,A :. S
AVE "A".....MS.49152 :. MACHIN
E CODE WILL BE LOADED STARTING AT LOC. 4
9152...... 40959.AD . AD.49152 . BL.54:
K . 190.C.... LOCATI
ON 1 WILL CONTAIN BLOCK POINTER, BL. ...
. BL=54 -- BASIC INT
ERPRETER ROM OUT.K. .. 53247.AD . AD.573
44 . BL.51: K . 190......
BL= 51 -- I/O ROUTINES OUT.+.... 5
7343.AD . AD..65535 . BL.53:K . 190.`...
. BL= 53 -- KERNAL
ROM OUT.....BL. 55 :. WITHIN
NORMAL BASIC AREA.B.... 162,00,134,1 :.
MACHINE LANGUAGE ROUTINE...H.. 174,000
,0000,134,251,162,55,134,1,96...R.. I.0
. 13 :. LOOP FOR BASIC LOADER.O....
ML :. GET NEXT BYTE OF M.L.
ROUTINE..... (MS.I),ML :. PUT M.L.
BYTE INTO PLACE.......L....(MS.1),BL
:. STORE BLOCK POINTER IN 2ND BYTE OF
M.L. ROUTINE.....HA..(AD.256) :. HIG
H-ORDER BYTE OF MASKED-RAM ADDRESS.6...L
A.AD.256.HA :. LOW-ORDER " ".M
.... MS.5,LA :. PUT ADDRESSES INTO
M.L. ROUTINE.{.".. MS.6,HA...,.. 56333,
127 :. DISABLE INTERRUPTS.R.6..(MS)
:. EXECUTE M.L. ROUTINE...@..
56333,129 :. RE-ENABLE INTERRUPTS.(
.J.A.B(251) :. READ THE DATA BYTE
./.T..A.5.^.....
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