Disk formats / Diskettenformate#

FormatSidesTracks/DisksideKBitRecordingBytes/SectorSector/TrackDisksizeATR Size 1)
Single SD140125FM1281890 KB92.176 2)
Medium/Enhanced MD140250MFM12826130 KB133.136 2)
Double DD140250MFM25618180 KB183.952 3)
Quad DS/DD/40 Tracks240250MFM25618360 KB368.272 3)
Octo DS/DD/80 Tracks280250MFM25618720 KB736.912 3)
High280500MFM256361.440 KB1.474.192 3)
Extra High2801.000MFM256722.880 KB2.948.752 3)
Harddisk11xMFM12865.5358 MB8.388.496 2)
Harddisk11xMFM25665.53516 MB16.776.592 3)
Harddisk11xMFM51265.53532 MB33.553.936 4)
1) XFD: subtract -16 Bytes (ATR Header), therefore add +384 Bytes! (XFD saves the full boot sector size / disksize, BUT it does not / cannot save the full sector data – these additional 384 bytes are simply empty!)

2) full byte size / disksize (has 128 bytes boot sectors, thus no need to subtract 384 Bytes!)

3) byte size minus boot sectors (has 256 byte boot sectors, thus 3x 128 bytes = 384 bytes already subtracted, since the Atari OS only allows 128 byte boot sectors from diskette! the real disksize is therefore 384 bytes larger, but that data is not transfered from the floppy to the computer! most A8 floppy drives would require a firmware change to read/transfer full 256 bytes bootsectors)

4) harddisks can use full 512 bytes for bootsectors! floppy disks are still limited to 128 bytes bootsectors!


Diskformats and DOS versions supporting them#

DOS90KB130KB180KB360KB720KB1.440KBRemark
DOS 1.0YNNNNN
DOS 2.0
SmartDOS
YNYNNNDOS 2.0s can read 180k after a Reset; DOS 2.0d can read 90k after a Reset!
DOS.SYS of SmartDOS is based on DOS 2.0! (Rainbow DOS and Black DOS
are merely DUP.SYS replacements for DOS 2.0s or DOS 2.0d, there are many others...)
DOS 2.5YYNNNN
DOS 3.0YYNNNN
DOS 4.0YNYYNN
DOS XEYYYYNN
Bibo DOS 6.xYYYYNN
Turbo DOS 2.xYYYYNN
Top DOS 1.5 ProfYYYY?N
Mach DOS 3.7YNYYNN
MyDOS 4.5xYYYYYNMyDOS requires a special / external formatter to format 1440 KB
- one is available e.g. with the CSS Black Box or the CSS Floppyboard,
maybe there are also some other external formatters...?!?
Sparta DOS 3.2x/3.3xYYYYYY
Real DOS 2.xYYYYYY
BeweDOS 1.xYYYYNNa 720k or 1440k disk must be formatted with SpartaDOS or
SDX or Real DOS, then Bewe DOS can be copied onto it!
SDX 4.xYYYYYY
Lite DOS 2.x/3.XYYYYY?
Super DOS 5.xYYYYNN
DOS II+D 4.5YYNNNN
DOS II+D 6.xYYYNNN
XDOS 2.43YYYYNNin 360k mode the two disksides are used as two
floppy drives (D1: and D2:) in XDOS!
KDOS 1.0YNNNNN
OSS A+2.0YNYNNN
DOS XL 2.3xYNYNNN
OS A+4.1N?YYYYYOS A+4.1 was advertized being capable of 128 BpS,
256 BpS and 512 BpS, any format from 128 KB to approx. 15,6 MB!


Harddisk partition formats and DOS versions supporting them#

128 Byte sectors (single density)#

Partition Size
Sectors
512 K
4.095
1 M
8.191
2 M
16.383
4 M
32.767
8 M
65.535
Remark
Top DOS 1.5 ProfYYYYYTop DOS Prof. should support subdirs and harddisks,
but I have no clue how! (manuals and information missing!)
MyDOS 4.5xYYYYY
SpartaDOS 3.2x/3.3xYYYYY
RealDOS 2.xYYYYY
MyDOS 4.5xYYYYY
BeweDOS 1.xYYYYYharddisk must be formatted with Sparta DOS or SDX or Real DOS,
then Bewe DOS can be copied onto it!
LiteDOS 2.x/3.xYYYYY
DOS XEYYYYYDOS XE does support subdirs, but harddisks up to 16MB can
only be used with sup8pdct's homebrew DOS XE formatter!
OS A+ 4.1YYYYYOS A+ 4.1 was advertized being capable of 128 BpS,
256 BpS and 512 BpS, any format from 128 KB to approx. 15,6 MB!

256 Byte sectors (double density)#

Partition Size
Sectors
1 M
4.095
2 M
8.191
4 M
16.383
8 M
32.767
16 M
65.535
Remark
Top DOS 1.5 ProfYYYYYTop DOS Prof. should support subdirs and harddisks,
but I have no clue how! (manuals and information missing!)
MyDOS 4.5xYYYYY
SpartaDOS 3.2x/3.3xYYYYY
RealDOS 2.xYYYYY
BeweDOS 1.xYYYYYharddisk must be formatted with Sparta DOS or SDX or Real DOS,
then Bewe DOS can be copied onto it!
SDX 4.xYYYYY
LiteDOS 2.x/3.xYYYYY
DOS XEYYYYYDOS XE does support subdirs, but harddisks up to 16MB can
only be used with sup8pdct's homebrew DOS XE formatter!
OS A+ 4.1YYYYYOS A+ 4.1 was advertized being capable of 128 BpS,
256 BpS and 512 BpS, any format from 128 KB to approx. 15,6 MB!

512 Byte sectors (quad density)#

Partition Size
Sectors
1 M
2.047
2 M
4.095
4 M
8.191
8 M
16.383
16 M
32.767
32 M
65.535
Remark
Top DOS 1.5 ProfNNNNNN
MyDOS 4.5xNNNNNN
SpartaDOS 3.2x/3.3xNNNNNN
RealDOS 2.xNNNNNN
BeweDOS 1.xNNNNNN
SDX 4.xYYYYYY
LiteDOS 2.x/3.xNNNNNN
DOS XENNNNNN
OS A+ 4.1YYYYY?OS A+ 4.1 was advertized being capable of 128 BpS,
256 BpS and 512 BpS, any format from 128 KB to approx. 15,6 MB!

Andere Quellen#

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« This page (revision-14) was last changed on 16-Jun-2020 23:00 by Florian Dingler