martypc/floppy
2023-07-14 18:42:14 +01:00
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FORTH initial commit 2023-07-14 18:42:14 +01:00
mfcobol initial commit 2023-07-14 18:42:14 +01:00
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readme.md initial commit 2023-07-14 18:42:14 +01:00

Floppy Directory

Put floppy images in this directory. Valid image formats are flat sector images of the type created by WinImage, dd or other such utilities, typically with *.img or *.ima extensions. Compressed *.imz images are not supported.

MartyPC will adjust the floppy drive size within the capabilities of the currently emulated machine, based on the size of the image loaded. Thus if you load a 720KB floppy image, the drive becomes a 720KB floppy drive. There is no need to configure this setting.

However, if emulating a IBM PC or XT, note that certain floppy sizes will not work as the machine/BIOS does not know how to handle a disk of that size.

Floppy images must be one of these exact file sizes:

bytes type
163,840 160KB floppy, single-sided Rare, only used by the earliest PCs.
184,320 180KB floppy, single-sided Rare, only used by the earliest PCs.
327,680 320KB floppy, double-sided Somewhat rare.
368,640 360KB floppy, double-sided Extremely common.
737,280 720KB floppy, double-sided Extremely common.
1,228,800 1.2MB floppy, double-sided Extremely common.

The exception is anything smaller than 163,840 bytes will be loaded as that size, padded with 0s. This is a convenience feature for development of boot sector software or loading of boot sector demos and games.