Added dump of PC-DOS 1.10 boot sector
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Jeff Parsons
Jeff Parsons
parent
fbc0fa57d5
commit
adc44ab481
2 changed files with 53 additions and 17 deletions
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@ -19,13 +19,12 @@ PC-DOS 1.00
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-----------
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PC-DOS 1.00 was completed in August 1981 and announced at an IBM press conference on August 12, 1981,
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when IBM introduced the original IBM PC (Model 5150).
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when IBM introduced the original IBM PC (Model 5150). It was released on one single-sided (160Kb) diskette.
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The disk's [Directory Listing](#directory-of-pc-dos-100-diskette) and [Boot Sector](#pc-dos-100-boot-sector)
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are shown below.
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To learn how to use PC-DOS 1.00, see the [Documentation](/pubs/pc/software/dos/PCDOS100/).
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To learn more about this single-sided (160Kb) diskette, see the
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[Directory Listing](#directory-of-pc-dos-100-diskette) and [Boot Sector](#pc-dos-100-boot-sector) below.
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{% include machine.html id="ibm5150-pcdos100" %}
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### Directory of PC-DOS 1.00 Diskette
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@ -18,20 +18,14 @@ machines:
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PC-DOS 1.10
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-----------
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The PCjs machine below is running PC-DOS 1.10.
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PC-DOS 1.10 was released in May 1982 on one single-sided (160Kb) diskette.
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The disk's [Directory Listing](#directory-of-pc-dos-110-diskette) and [Boot Sector](#pc-dos-110-boot-sector)
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are shown below.
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To learn how to use PC-DOS 1.10, see the [Documentation](/pubs/pc/software/dos/PCDOS110/).
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{% include machine.html id="ibm5150-pcdos110" %}
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PC-DOS 1.10 was released in May 1982 on one single-sided (160Kb) diskette. A complete listing of all the files
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is provided below.
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Also, in case you're wondering why 1920 + 6400 does not equal the "8704 bytes in 2 hidden files" reported by CHKDSK,
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that's because all CHKDSK byte totals are cluster-granular. On a 160Kb diskette, 1 cluster equals 1 sector or 512
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bytes.
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CHKDSK considers the size of IBMBIO.COM to be 2048 bytes (1920 rounded up to the nearest 512 multiple), and the
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size of IBMDOS.COM is 6656, so the total number of bytes consumed by those two files is 8704.
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### Directory of PC-DOS 1.10 Diskette
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IBMBIO COM 1920 05-07-82
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@ -71,8 +65,51 @@ CHKDSK reports:
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144384 bytes in 26 user files
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7168 bytes available on disk
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Additional Information From [PC DOS Retro](https://sites.google.com/site/pcdosretro/doshist)
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---
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In case you're wondering why 1920 + 6400 does not equal the "8704 bytes in 2 hidden files" reported by CHKDSK,
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that's because all CHKDSK byte totals are cluster-granular. On a 160Kb diskette, 1 cluster equals 1 sector or 512
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bytes.
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CHKDSK considers the size of IBMBIO.COM to be 2048 bytes (1920 rounded up to the nearest 512 multiple), and the
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size of IBMDOS.COM is 6656, so the total number of bytes consumed by those two files is 8704.
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### PC-DOS 1.10 Boot Sector
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The boot sector of the PC-DOS 1.11 disk image contains the following bytes:
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00000000 eb 27 90 08 00 14 00 00 00 00 00 00 00 00 00 00 |.'..............|
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00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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00000020 00 00 00 00 00 00 00 cd 19 fa 8c c8 8e d8 33 d2 |..............3.|
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00000030 8e d2 bc 00 7c fb b8 60 00 8e d8 8e c0 33 d2 8b |....|..`.....3..|
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00000040 c2 cd 13 72 69 e8 85 00 72 dd 2e 83 3e 03 7c 08 |...ri...r...>.|.|
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00000050 74 06 2e c6 06 64 7d 02 bb 00 00 2e 8b 0e 03 7c |t....d}........||
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00000060 51 b0 09 2a c1 b4 00 8b f0 56 33 d2 33 c0 8a c5 |Q..*.....V3.3...|
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00000070 2e f6 36 64 7d 8a e8 8a f4 8b c6 b4 02 cd 13 72 |..6d}..........r|
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00000080 2d 5e 59 2e 29 36 05 7c 74 1f 8b c6 2e f7 26 65 |-^Y.)6.|t.....&e|
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00000090 7d 03 d8 fe c5 b1 01 51 be 08 00 2e 3b 36 05 7c |}......Q....;6.||
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000000a0 7c 05 2e 8b 36 05 7c eb c0 ea 00 00 60 00 be 67 ||...6.|.....`..g|
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000000b0 7d e8 02 00 eb fe 32 ff 2e ac 24 7f 74 0b 56 b4 |}.....2...$.t.V.|
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000000c0 0e bb 07 00 cd 10 5e eb ef c3 e9 33 ff bb 00 00 |......^....3....|
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000000d0 b9 04 00 b8 01 02 cd 13 1e 72 33 8c c8 8e d8 bf |.........r3.....|
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000000e0 00 00 b9 0b 00 26 80 0d 20 26 80 4d 20 20 47 e2 |.....&.. &.M G.|
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000000f0 f4 bf 00 00 be 8b 7d b9 0b 00 fc f3 a6 75 0f bf |......}......u..|
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00000100 20 00 be 97 7d b9 0b 00 f3 a6 75 02 1f c3 be 1b | ...}.....u.....|
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00000110 7d e8 a2 ff b4 00 cd 16 1f f9 c3 0d 0a 4e 6f 6e |}............Non|
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00000120 2d 53 79 73 74 65 6d 20 64 69 73 6b 20 6f 72 20 |-System disk or |
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00000130 64 69 73 6b 20 65 72 72 6f 72 0d 0a 52 65 70 6c |disk error..Repl|
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00000140 61 63 65 20 61 6e 64 20 73 74 72 69 6b 65 20 61 |ace and strike a|
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00000150 6e 79 20 6b 65 79 20 77 68 65 6e 20 72 65 61 64 |ny key when read|
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00000160 79 0d 0a 00 01 00 02 0d 0a 44 69 73 6b 20 42 6f |y........Disk Bo|
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00000170 6f 74 20 66 61 69 6c 75 72 65 0d 0a 00 4d 69 63 |ot failure...Mic|
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00000180 72 6f 73 6f 66 74 2c 49 6e 63 20 69 62 6d 62 69 |rosoft,Inc ibmbi|
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00000190 6f 20 20 63 6f 6d 30 69 62 6d 64 6f 73 20 20 63 |o com0ibmdos c|
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000001a0 6f 6d 30 05 c6 06 77 2f ff 83 7e fc 00 75 0b 80 |om0...w/..~..u..|
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000001b0 7e f7 3b 75 05 c6 06 76 2f ff 89 ec 5d ca 04 00 |~.;u...v/...]...|
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000001c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
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### Additional Information From [PC DOS Retro](https://sites.google.com/site/pcdosretro/doshist)
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- distributed on 1 160KB floppy disk
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- double-sided 320KB floppy disk support added
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