From AtariForumWiki
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.


Compiled on Dec 7 1998 by N.Bales


All the files included in this package are (c)Atari Corp.

This package was made up with all of the latest utilities from Atari that I could find. Because I was unable to find one single archive with all the necessary files, I decided to make this archive.

The docs were also made up by myself, as I was unable to find the official ones.

I am in no way liable for any damage occuring following the use of these programs.

Nick Bales - bales@directprovider.net

AHDI Files

foldr100.prg	20/11/85	Folder bug patch
cache064.prg	21/11/90	Disk cache program
ahdi.prg	17/07/93	Hard disk driver 6.061
hinstall.prg	16/06/86	Installs bootable driver
hdx.prg		../../93	HD partionner/formatter

Quick guide to installing a harddrive


AHDI works with both |SCSI and IDE drives. These are the following hard drive requirements for each model:

Atari Megafile/SH20x

	ST/STF/STE/MegaST	ext	standard
	MegaSTE/TT		ext	standard
	Falcon			n/a	n/a


	ST/STF/STE/MegaST	ext	host adapter required
	MegaSTE/TT		ext/int	standard
	Falcon (Atari)		ext	standard
	Falcon (C-Lab)		int	standard


	ST/STF/STE/MegaST	int	internal adapter board
	MegaSTE/TT		n/a	n/a
	Falcon			int	standard

In most cases, a SCSI drive will require parity to be switched off.

There is no limit on a hard drive's total capacity, however there is a limit on the size of each partition under TOS.

	TOS 1.0x	256Mb
	TOS 2.0x/3.0x	512Mb
	TOS 4.0x	1Gb

To be sure of the version of TOS you are running, refer to a utility such as SYSINFO.PRG.

Make a AHDI disk.

- First of all, unzip all these files to a blank disk. - Make a new folder called AUTO, and copy AHDI.PRG into it. - Next, copy both FOLDR100.PRG and CACHE064.PRG. - Select 'Install Icon' from the desktop menu, and type 'C' (not 'c') and 'OK' - Select 'Save Desktop' to save your desktop to the floppy. - Label this disk as your AHDI Utility Disk, and make a backup copy of it.

Accessing your drive

-Switch all units off, switch on the drive, and then the ST, with your AHDI disk in the drive. -Double click on the 'C' icon.

Formatting the drive (if necessary)

- THIS WILL ERASE ALL DATA ON YOUR DRIVE - DO NOT ATTEMPT TO FORMAT AN IDE DRIVE. - ONLY FORMAT A DRIVE IF NECESSARY - Run HDX.PRG and select Partition. Select the drive to format and launch the format. - Once formatted, the drive must be partitioned.

Partitionning the drive (if necessary)

- THIS WILL ERASE ALL DATA ON YOUR DRIVE - Run HDX.PRG and select Partition. Set each partition letter and size, respecting the limitations in the primer section above. - Follow the onscreen instruction until the reboot. - Select Install Icon on the desktop, and add as many icons as partitions on the drive. - Save the desktop to the harddrive.

Making the drive bootable

-Run HINSTALL.PRG and select INSTALL and follow the instructions.

Upgrading to AHDI6.061 from an earlier version.

- Rename the SHDRIVER.SYS on your boot drive to SHDRIVER.OLD - Copy the AHDI.PRG file over to the boot drive - Rename it to SHDRIVER.SYS


- The drive's icon will not appear on the desktop until you have installed the new icon manually. You must them save the desktop.

- If a 'C' drive is installed, the desktop will automatically be saved there. Otherwise it will be saved on 'A'.

- The SHDRIVER.SYS file that is created by HINSTALL.PRG is no other than a copy of AHDI.PRG. If you delete this file, the drive will no longer autoboot.

- If the drive already has a bootable boot sector, all you may need is to copy the SHDRIVER.SYS file manually.

- IDE drives require at least TOS 2.06 to be bootable. If an earlier TOS is used, a boot disk with AHDI in the AUTO folder will be needed.

Download software

  • AHDI can be downloaded from here

Back to IDE & SCSI Drivers