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RDRVSX32: FAT32 RAM drive for HimemSX (Announce)

posted by Japheth Homepage, Germany (South), 14.03.2022, 15:09
(edited by Japheth on 15.03.2022, 13:06)

The problem I found is rather complicated:

1. in config.sys, the new himemsx.exe, doslfn 0.41d and rdrvsx32 are loaded, a 4 GB ramdisk created.

2. some LFN files are copied to the ramdisk's root directory.
The LFNs need just a bit more space than what fits in a cluster ( so the root directory then has 2 clusters ).

3. a sub-directory is created in the root directory.

4. the very same files that were copied to the root directory are now copied into the sub-directory. Just before the last file is copied, everything seems ok. After the last file has been copied, there is garbarge in the sub-directory.

I verified that the problem occurs with doslfn loaded only. And it does NOT occur if both drives (src and dest) are physical drives. Might actually be a doslfn bug that is revealed by the fat32 ramdisk.

EDIT: the problem also occurs if I use rdrvx32.exe (with a 2 GB ramdisk) and the standard HimemX. So it definitely is NOT a problem of the modifed himemsx.

---
MS-DOS forever!

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