Ladislav Lacina wrote:
Hi! I would like to know whether is there any diference between MSDOS and FreeDOS behavior in TSR programs. Can I in TSRs call the same subset of DOS funkcions like in MSDOS? Or more or less? Can I read and write files from my TSRs?
The behaviour _should_ match MS-DOS in this area, however, the reality is there may be cases that differ; if found and reported, time permitting, they will be corrected. TSRs should be able to read/write files, assuming the same techniques needed for ms-dos are used, specifically either don't call into DOS while inDOS or take care to swap out relevant ports (such as SDA) to allow recursing into the kernel (for a working example, the shsufdrv device driver [allows mounting disk images as a drive letter] does the latter to read sectors from the image file when the kernel makes a read request to emulated drive).
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