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diff --git a/atrsize.rst b/atrsize.rst new file mode 100644 index 0000000..2c81f90 --- /dev/null +++ b/atrsize.rst @@ -0,0 +1,92 @@ +.. RST source for atrsize(1) man page. Convert with: +.. rst2man.py atrsize.rst > atrsize.1 +.. rst2man.py comes from the SBo development/docutils package. + +======= +atrsize +======= + +----------------------------------------------------------------------------- +Change the size of an Atari 8-bit ATR disk image, or create a blank ATR image +----------------------------------------------------------------------------- + +.. include:: manhdr.rst + +SYNOPSIS +======== + +atrsize [**-bB**] *infile.atr* [*sectors*] + +DESCRIPTION +=========== + +Without the **-b** or **-B** options: + + *infile.atr* will be backed up to *infile.atr~*, and a new *infile.atr* will + be created. If *sectors* is given, the new image file will be truncated + or extended to the new size. Without *sectors*, the new image's size will + be set as follows: + + .. csv-table:: + :header: "Density","Original Sectors","New Sectors" + + "Either","0 - 2","Error" + "Either","3 - 719","720" + "Either","720","720 (no change)" + "Single","721 - 1039","1040 (aka 1050 enhanced density)" + "Single","1040","1040 (no change)" + "Single","1041 or more","Unknown (must specify size)" + "Double","721 - 1339","1440 (aka double sided, double density)" + "Double","1440","1440 (no change)" + "Double","1441 or more","Unknown (must specify size)" + + When *sectors* is given, its allowed range is from 3 to 65535. *infile.atr* + will be rewritten at the new size. + + When **atrsize** changes the size of an image, the new ATR header + will reflect the new size. If the new image is larger than the old + image, **atrsize** pads the image with empty sectors containing all 0 + data bytes. If the new image is smaller than the old image, it is + truncated, and any data in the old image that resides in the removed + sectors will be lost. + + For ATR images where the ATR header doesn't agree with the actual size + of the file, the actual file size is used to determine the number of + sectors. The output image will have its ATR header adjusted to reflect + the actual file size of the image, if sectors is not given. + +With **-b** or **-B**: + + **atrsize** will create a new, blank image called *infile.atr*. If + this file already exists, however, it will not be overwritten + (instead, **atrsize** will exit with a "file exists" message). + + If *sectors* is given, the new image's size will be set to that many + sectors. If not given, the new image's size will be 720 sectors. + + **-b** creates a new image with 128-byte sectors (single density) + + **-B** creates a new image with 256-byte sectors (double density). + + New images created with **atrsize** consist of a valid ATR header, + and sectors filled with zeroes. No boot sectors, directory, VTOC, + or filesystem are created. To use a blank image for file + storage, it must be formatted with an Atari DOS (either in an + emulator or with a real Atari via SIO2PC cable). If you're + trying to create a blank DOS 2.0S disk, use **axe -b**. + +NOTES +===== + +- **atrsize** cannot change the sector size (density) of an image under + any circumstances. Only the sector count may be changed. + +- **atrsize** will fail if the input file doesn't have a valid ATR header. + If it's an XFD (raw) image, use **xfd2atr**\(1) to convert it to an ATR first. + +EXIT STATUS +=========== + +Exit status is zero for success, non-zero for failure. + +.. include:: manftr.rst |