EDR-DOS kernel r20250307

This is a snapshot release of the single-file (KERNEL.SYS) and dual-file kernel (DRBIO.SYS, DRDOS.SYS) flavors as well as COMMAND.COM. 1.44M floppy images are also provided.

If unsure, which flavor to use: the single-file version is probably the one you want. You may consider the dual-file version for maximum compatibility with an existing DR-DOS installation.

Changes since release 20240914

Fixes

• pass dconfig environment to the shell, fix FreeCOM
• more accurate FAT32 size calculation, integer overflow fix for 2TiB FAT32 drives
• fix FCB rename (21.17) corrupted destination name
• in func36 shift down amount total clusters
• fix FAT32 detection in INT21,36 handler
• prevent calculation of CHS values on LBA rw to bootsector
• re-test BCB dirty status after a recursive buffer flush
• fix missing video page and attr on console driver init output

Changes

• speedup DRDOS div64 routine

Full Changelog: v20240914...v20250307

EDR-DOS kernel r20240914

This is a snapshot release of the single-file (KERNEL.SYS) and dual-file kernel (DRBIO.SYS, DRDOS.SYS) flavors as well as COMMAND.COM. 1.44M floppy images are also provided.

If unsure, which flavor to use: the single-file version is probably the one you want. You may consider the dual-file version for maximum compatibility with an existing DR-DOS installation.

Changes to release 20240821

• fix kernel crashes (division error) on systems with FAT partitions beyond 502GiB into the disk
• fix kernel not booting on original IBM-PC due to INT 3 vector not being properly initialized
• fix kernel not being able to boot from second disk if first disk is empty
• fix the dual-file kernel not finding DRDOS.SYS when booting from B:
• expand COMSPEC to absolute path
• for additional changes see the Changelog: r20240821...v20240914

EDR-DOS kernel r20240821

This is a snapshot release of the single-file (KERNEL.SYS) and dual-file kernel (DRBIO.SYS, DRDOS.SYS) flavors as well as COMMAND.COM. 1.44M floppy images are also provided.

If unsure, which flavor to use: the single-file version is probably the one you want. You may consider the dual-file version for maximum compatibility with an existing DR-DOS installation.