MDFS::Software.HADFS Search

Harston ADFS


HADFS is a full hierarchial filing system similar to the NFS and ADFS systems. It runs on any 6502-based BBC computer, with any disk hardware. HADFS is freely distributable, but remains copyright © J.G.Harston.

System.dsd
System.ssd
System.zip
5.50 12-Jun-2007 400K
400K
198K
Latest version HADFS System Disk disk.
System.dsd is C:H:S ordered disk image and System.ssd is H:C:S ordered disk image. The images can be written to disk with the disk image tools in DiskTools, with the HADFS BACKUP program and the RISC OS HADFS Filer. HADFS can be installed on the GoMMC with the program MMCHADFS, instructions are here.
Syst550.zip
Syst550.ssd
Syst550.zip
5.50 17-May-2007 198K
400K
400K
HADFS System Disk disk version 5.50. Workspace moved to avoid being corrupted by DFS on the BBC B+. The full 'Acorn Era' 7-bit year range storable, extending date range to 1981-2108.
Syst540.dsd
Syst540.ssd
Syst540.zip
5.40 22-Nov-2005 400K
400K
198K
HADFS System Disk disk version 5.40. Fully supports 24-bit disk access. IDE drivers work correctly with the Tube. Workspace rearranged to allow full 24-bit drive access. All internal code correctly manipulates 24-bit disk addresses. *CAT no longer emits extra blank lines. Due to tight space in the ROM, the *FORM and *COPY commands are on disk. DFS on the BBC B+ interfers with HADFS 5.40.
HADFSMan       HADFS Manual. Technical reference and programming examples.
Filers 1.33 28-Nov-1999   HADFS Filer for RISC OS.
HADFSSpprt 1.14 03-Nov-2004 2K HADFS Support ROM. Contains drivers to support external devices for versions of HADFS that do not contain them. Newly updated to include GoMMC and IDE drivers.
Source       HADFS Source files for version 5.xx. These source files are rather untidy. I am tidying them up, and will release them under the GPL as version 6.

Latest News

27-May-2007: Version 5.50 implements the full Acorn 7-bit year range, in plenty of time before HADFS ran out of dates in 2112. All years from 1981 to 2108 are usable.

22-Nov-2005: Version 5.40 fully supports 24-bit disk access. IDE drivers work correctly with the Tube.

22-Nov-2005: HADFS transitional version 5.31 has rearranged workspace to allow full 24-bit drive access. All internal code correctly manipulates 24-bit disk addresses. Preliminary code put in place for 24-bit disks.

24-Oct-2005: HADFS version 5.30 now supports IDE drives natively, without the need for the Support ROM. HADFS version 5 uses 16-bit disk addresses, so drives are split into 16M partitions. Note: IDE access from CoProcessor memory doesn't work properly.

12-Sep-2004: GoMMC drivers are now integrated into HADFS version 5.29 ROM. I am currently testing this and adding 24-bit drive code to allow drives large than 16MB to be used.


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