English Amiga Board - View Single Post

patrik · 10 March 2023, 17:02

Todays somewhat unnecessary info:

The fat95 filesystem handler which is commonly used with spisd.device to mount SD cards claims "* large harddisk support via TD64 or direct SCSI" in its readme.

However, in actuality it uses the NSD commands NSCMD_TD_READ64 (0xc000) and NSCMD_TD_WRITE64 (0xc001) to access 4GB+ drives, not the TD64 commands TD_READ64 (24) and TD_WRITE64 (25).

This does not matter in this case as the updated spisd.device supports both NSD and TD64 commands, but I found it a bit confusing so I thought I should share.

10 March 2023, 17:02	#59
patrik Registered User Join Date: Jan 2005 Location: Umeå Age: 43 Posts: 927	Todays somewhat unnecessary info: The fat95 filesystem handler which is commonly used with spisd.device to mount SD cards claims "* large harddisk support via TD64 or direct SCSI" in its readme. However, in actuality it uses the NSD commands NSCMD_TD_READ64 (0xc000) and NSCMD_TD_WRITE64 (0xc001) to access 4GB+ drives, not the TD64 commands TD_READ64 (24) and TD_WRITE64 (25). This does not matter in this case as the updated spisd.device supports both NSD and TD64 commands, but I found it a bit confusing so I thought I should share.