How To : Install the SAGA SDCard Driver

Jason Mac Mullan kindly develops and maintains the SAGA SDCard Driver to be used with the MicroSD slot of the Vampire boards. See SAGA SDCard Core article for more technical informations. This device can be used as an additional disk for use with your AmigaOS 3.x setup. The driver is still in a beta stage. Always BACKUP your data before use such piece of software, until you are sure all works as expected.


The current SAGA SD Driver does NOT implement - in current version - the AUTOMATIC disk drive geometry methods that would allow AmigaOS DOSDrivers MountLists to use some handy default values. As a consequence, keep in mind that :

  1. MountList attributes such as LowCyl, HighCyl and some others must be explicitely specified. For example, LowCyl = 0 will NOT work !
  2. Each MicroSD card must use its own MountList. NEVER use a MountList dedicated to a given SD card with another SD card.
  3. Use third-party program to create correct MountList by reading the lowlevel geometry of the disk, such as GiggleDisk.

The installation of the SDCard on the Vampire requires some files, provided on the SAGA driver package and some additional tools available on Aminet. Please, follow step by step the following procedure :

1.1) Install the SAGA SD Driver package

  1. Run the installer provided in the SAGADriver LHA Package.

1.2) Install SCSIQuery (optional)

  1. Download SCSIQuery, available on Aminet.
  2. Copy the file SCSIQuery/SCSIQuery to C:SCSIQuery
  1. Download PFS3AIO, available on Aminet.
  2. Copy the file pfs3_aio-handler to L:pfs3_aio-handler.
  3. Download PFS3_53, available on Aminet.
  4. Copy the file PFS3/tools/pfsformat to C:pfsformat.
  5. Optionally, you can copy the other PFS tools (pfsdoctor, setfnsize, …).

1.4) Check for Installed files

  1. Reboot your computer
  2. Check if the following files are installed in the System drive :
Filename >Version FileName FULL
C:GiggleDisk GiggleDisk 1.19 (21/05/2005) by Guido Mersmann - Amiga 68K Version
C:pfsformat Format 1.1 (17/05/1999) by Michiel Pelt and copyright 1999 Great Effect Development
C:SCSIQuery SCSIQuery 1.33 (22/11/1999) © THOR
C:SDDiag SDDiag 0.8n (28/04/2016) © The AROS Development Team
DEVS:sagasd.device sagasd.device 0.9 (16/05/2016)
L:pfs_aio-handler pfs3_aio-handler 18.5 (14/05/2014)
SYS:System/SDMount no information


The SAGA SD Driver (sagasd.device) provides method for READ GEOMETRY of the disk. First step is to check if the MicroSD card that will be used is compatible or not.

  1. Make sure you have all the required files installed on your System (see previous chapter).
  2. Insert a MicroSD card in the dedicated Vampire MicroSD slot.
  3. Open a CLI (newcli).
  4. Type SDDiag and RETURN.
  5. If you have an error, then your MicroSD will NOT works with the driver.
  6. If you have informations such as Block Size, Blocks and Capacity, then the MicroSD should work with the driver.
  7. Additionnaly, type in the CLI, SCSIQuery to double-check the geometry of your SDCard.
  8. Check if Capacity in blocks is same as Blocks shown in SDDiag.
  9. Check if Block length is same as Block Size shown in SDDiag.
  10. If there is differences, something is wrong and should be reported in the APOLLO Forum.


Different methods for different uses

  1. Prepare the disk on Vampire using HDToolBox with a given FileSystem, and GiggleDisk.
  2. Prepare the disk on WinUAE or FS-UAE using HDToolBox with a given FileSystem.
  3. Prepare the disk on Windows or Linux using FAT95 FileSystem.

The following guide will explains how to prepare a MicroSD card

  1. From your Amiga equipped with Vampire board.
  2. Using AmigaOS3.1.
  3. Using HDToolBox version 45.6.
  4. Using a single partition.
  5. Using PFS FileSystem (requires L:pfs3_aio-handler version 18.5).
  6. Using SYS:System/SDMount (requires C:GiggleDisk version 1.19).
  7. Using C:pfs3format version 1.1.

Prepare the MicroSD card with HDToolBox

  1. Open a CLI (newcli).
  2. Type SYS:Tools/HDToolBox device=sagasd.device and RETURN.
  3. HDToolBox should open the GUI and shows SAGASD, Vampire SAGA-SD.
  4. Click on this item in the list and then click the Install Drive button.
  5. Confirm the Warning requester.
  6. Click New in the requester if the disk have already a RDB.
  7. The program now shows the Drive Definition for SAGASD.
  8. Informations are read by the sagasd.device and should be correct, no need to modify them.
  9. Click Install button and wait a small delay.
  10. Click Partition Drive button.
  11. Select '1' in the Default Setup ComboBox, for a single partition.
  12. Change Buffers to '150'.
  13. Change Partition Name to SD0.
  14. Ensure Bootable is NOT checked.
  15. Click Add / Update button.
  16. Delete all items (FileSystems) in list.
  17. Click Add new File System… and select L:pfs3_aio-handler.
  18. Modify the Identifier 0x444F5303 by 0x50445303.
  19. Ensure Version is '18.0'.
  20. Click Ok button.
  21. Click Change… button.
  22. Select PDS\03 in the File System ComboBox.
  23. Click Save button.
  24. Click Exit button.
  25. Reboot.

Create the MountList with SDMount

  1. Open a CLI (newcli).
  2. Type Execute SYS:System/SDMount and RETURN.
  3. Type CD T:SDMount and RETURN.
  4. Type Dir and RETURN.
  5. This script use C:GiggleDisk to read the MicroSD partitions table,
  6. and creates one MountList per partition in T:SDMount directory.
  7. Type Ed SD0 and RETURN.
  8. Ensure that FileSystem attribute is FileSystem = L:pfs3_aio-handler.
  9. Save and exit if needed.
  10. Type Copy ALL TO SYS:Storage/DOSDrivers/.
  11. Better Reboot, especially if you modified the MountList.

Quick format the partitions with pfsformat

  1. Open a CLI (newcli).
  2. Type Mount SYS:Storage/DOSDrivers/SD0 and RETURN.
  3. Now, we have SD0: mounted and is ready to be formatted.
  4. A icon SD0:Unitialized might appears or not on your Workbench desktop.
  5. Type C:PFSFormat DEVICE=sagasd.device NAME=SDCARD1 QUICK FNSIZE=107 and RETURN.
  6. ALWAYS use QUICK command on SDCard devices (true for all non-mechanical devices, including CompactFlash).
  7. FNSIZE stands for 'FileName Size', max is 107 chars with PFS.
  8. Wait until QUICK Format is finished.
  9. Optionally, copy SYS:Storage/DOSDrivers/SD0 (including the .info) to DEVS:DOSDrivers/ to mount them at boot.

Under MIT License driver sources :


SDCard to MicroSD adapter

SDCard to MicroSD adapter/extender


  1. Make it works :) - Done since sagasd.device version 0.9+ in addition to SILVER5+ core.
  2. Fix all remaining bugs spotted by testers - Some are fixed, but there can still be some.
  3. Add Automatic disk drive geometry, for much more friendly use.
  4. Handle on the fly Removable disk. Such feature is NOT supported natively by AmigaOS3.x.
  5. Make it Romable so that the OS can boot from SD.

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