[lDOS] Diskettes with more than 255 cylinders or 65

Title	[lDOS] Diskettes with more than 255 cylinders or 65_535 sectors may fail
Author	E. C. Masloch
Created	2026-10-18 11:09:18 +0200 Oct Sun
State	closed

E. C. Masloch on 2026-10-18 11:10:58 +0200 Oct Sun

Fixed in hg 7d79e3352de7 on 2026-10-16.

Changeset message states:

The RSECFAT calculation could overflow the division, causing a divide error and a subsequent crash on trying to terminate the init process. This changeset calculates the RDRVLIM taking into account the full range of permissible values, and additionally sets up a placeholder for RSECFAT if the division would overflow.