Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_22.ADF » P/IBMtxt1
P/IBMtxt1
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_22.ADF |
| Filename: | P/IBMtxt1 |
| Read OK: | ✔ |
| File size: | 03DF bytes |
| Load address: | 24204556 |
| Exec address: | 4D42492E |
File contents
INVISIBLE BOOT MAKER
~~~~~~~~~~~~~~~~~~~~
By Richard Dimond
Since submitting my idea for an invisible BOOT file, I have now made up a
program which will convert any normal BOOT file - I am all for making the
the computer do the work!!
All you need to do is to LOAD this program and then, when you have
inserted and mounted your disc with the normal BOOT file, RUN the program.
The BOOT file is then converted and SAVEd as I described last time.
Here is how it works -
Lines 60 - 80 load the first 12 bytes to &3000
The BOOT file is then LOADed to &300C
The M/code routine uses OSFILE to find the length of the
original file.
Line 120 calculates the address of the final CR character
This is replaced at line 1330 and SAVEd at line 140.
Note that the four bytes in lines 60 and 130 are in reverse order as the
computer enters these with the low byte first.
**************************************************************************
00000000 0d 49 4e 56 49 53 49 42 4c 45 20 42 4f 4f 54 20 |.INVISIBLE BOOT | 00000010 4d 41 4b 45 52 0d 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e |MAKER.~~~~~~~~~~| 00000020 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 0d 42 79 20 52 69 |~~~~~~~~~~.By Ri| 00000030 63 68 61 72 64 20 44 69 6d 6f 6e 64 0d 0d 53 69 |chard Dimond..Si| 00000040 6e 63 65 20 73 75 62 6d 69 74 74 69 6e 67 20 6d |nce submitting m| 00000050 79 20 69 64 65 61 20 66 6f 72 20 61 6e 1a 20 69 |y idea for an. i| 00000060 6e 76 69 73 69 62 6c 65 20 42 4f 4f 54 20 66 69 |nvisible BOOT fi| 00000070 6c 65 2c 20 49 20 68 61 76 65 20 6e 6f 77 20 6d |le, I have now m| 00000080 61 64 65 20 75 70 20 61 0d 70 72 6f 67 72 61 6d |ade up a.program| 00000090 20 77 68 69 63 68 20 77 69 6c 6c 20 63 6f 6e 76 | which will conv| 000000a0 65 72 74 20 61 6e 79 20 6e 6f 72 6d 61 6c 20 42 |ert any normal B| 000000b0 4f 4f 54 1a 20 66 69 6c 65 20 2d 20 49 20 61 6d |OOT. file - I am| 000000c0 20 61 6c 6c 20 66 6f 72 20 6d 61 6b 69 6e 67 20 | all for making | 000000d0 74 68 65 0d 74 68 65 20 63 6f 6d 70 75 74 65 72 |the.the computer| 000000e0 20 64 6f 20 74 68 65 20 77 6f 72 6b 21 21 0d 0d | do the work!!..| 000000f0 41 6c 6c 1a 20 79 6f 75 20 6e 65 65 64 20 74 6f |All. you need to| 00000100 20 64 6f 20 69 73 20 74 6f 20 4c 4f 41 44 1a 20 | do is to LOAD. | 00000110 74 68 69 73 1a 20 70 72 6f 67 72 61 6d 1a 20 61 |this. program. a| 00000120 6e 64 1a 20 74 68 65 6e 2c 1a 20 77 68 65 6e 1a |nd. then,. when.| 00000130 20 79 6f 75 1a 20 68 61 76 65 0d 69 6e 73 65 72 | you. have.inser| 00000140 74 65 64 20 61 6e 64 20 6d 6f 75 6e 74 65 64 20 |ted and mounted | 00000150 79 6f 75 72 20 64 69 73 63 20 77 69 74 68 20 74 |your disc with t| 00000160 68 65 20 6e 6f 72 6d 61 6c 20 42 4f 4f 54 20 66 |he normal BOOT f| 00000170 69 6c 65 2c 20 52 55 4e 20 74 68 65 20 70 72 6f |ile, RUN the pro| 00000180 67 72 61 6d 2e 20 20 0d 54 68 65 20 42 4f 4f 54 |gram. .The BOOT| 00000190 20 66 69 6c 65 20 69 73 20 74 68 65 6e 20 63 6f | file is then co| 000001a0 6e 76 65 72 74 65 64 20 61 6e 64 20 53 41 56 45 |nverted and SAVE| 000001b0 64 20 61 73 20 49 20 64 65 73 63 72 69 62 65 64 |d as I described| 000001c0 20 6c 61 73 74 20 74 69 6d 65 2e 0d 0d 48 65 72 | last time...Her| 000001d0 65 20 69 73 20 68 6f 77 20 69 74 20 77 6f 72 6b |e is how it work| 000001e0 73 20 2d 0d 20 20 20 20 20 20 4c 69 6e 65 73 20 |s -. Lines | 000001f0 36 30 20 2d 20 38 30 20 6c 6f 61 64 20 74 68 65 |60 - 80 load the| 00000200 20 66 69 72 73 74 20 31 32 20 62 79 74 65 73 20 | first 12 bytes | 00000210 74 6f 20 26 33 30 30 30 0d 20 20 20 20 20 20 54 |to &3000. T| 00000220 68 65 20 42 4f 4f 54 20 66 69 6c 65 20 69 73 20 |he BOOT file is | 00000230 74 68 65 6e 20 4c 4f 41 44 65 64 20 74 6f 20 26 |then LOADed to &| 00000240 33 30 30 43 0d 20 20 20 20 20 20 54 68 65 20 4d |300C. The M| 00000250 2f 63 6f 64 65 20 72 6f 75 74 69 6e 65 20 75 73 |/code routine us| 00000260 65 73 20 4f 53 46 49 4c 45 20 74 6f 20 66 69 6e |es OSFILE to fin| 00000270 64 20 74 68 65 20 6c 65 6e 67 74 68 20 6f 66 20 |d the length of | 00000280 74 68 65 0d 20 20 20 20 20 20 20 20 20 20 6f 72 |the. or| 00000290 69 67 69 6e 61 6c 20 66 69 6c 65 2e 0d 20 20 20 |iginal file.. | 000002a0 20 20 20 4c 69 6e 65 20 31 32 30 20 63 61 6c 63 | Line 120 calc| 000002b0 75 6c 61 74 65 73 20 74 68 65 20 61 64 64 72 65 |ulates the addre| 000002c0 73 73 20 6f 66 20 74 68 65 20 66 69 6e 61 6c 20 |ss of the final | 000002d0 43 52 20 63 68 61 72 61 63 74 65 72 0d 20 20 20 |CR character. | 000002e0 20 20 20 54 68 69 73 20 69 73 20 72 65 70 6c 61 | This is repla| 000002f0 63 65 64 20 61 74 20 6c 69 6e 65 20 31 33 33 30 |ced at line 1330| 00000300 20 61 6e 64 20 53 41 56 45 64 20 61 74 20 6c 69 | and SAVEd at li| 00000310 6e 65 20 31 34 30 2e 0d 0d 4e 6f 74 65 20 74 68 |ne 140...Note th| 00000320 61 74 1a 20 74 68 65 1a 20 66 6f 75 72 20 62 79 |at. the. four by| 00000330 74 65 73 20 69 6e 20 6c 69 6e 65 73 20 36 30 20 |tes in lines 60 | 00000340 61 6e 64 20 31 33 30 20 61 72 65 20 69 6e 20 72 |and 130 are in r| 00000350 65 76 65 72 73 65 20 6f 72 64 65 72 20 61 73 20 |everse order as | 00000360 74 68 65 0d 63 6f 6d 70 75 74 65 72 20 65 6e 74 |the.computer ent| 00000370 65 72 73 20 74 68 65 73 65 20 77 69 74 68 20 74 |ers these with t| 00000380 68 65 20 6c 6f 77 20 62 79 74 65 20 66 69 72 73 |he low byte firs| 00000390 74 2e 0d 0d 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |t...************| 000003a0 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 000003d0 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0d |**************.| 000003df
P/IBMtxt1.m0
P/IBMtxt1.m1
P/IBMtxt1.m2
P/IBMtxt1.m4
P/IBMtxt1.m5
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