Hi, On Mon, Feb 24, 2003 at 11:33:41PM +0100, Franz Bakan wrote: > 1. are all read commands 6 byte (08h) commands ?
All SCSI 08h commads (read) should be 6 bytes. However, there are other read commands that are 10 bytes: 28h "Should" as in "if the scanner conforms to the SCSI spec". > 2. how long is a block read from a scanner with the 08h command > min, max or fixed? I guess minimum is one byte, maximum is 2^24 bytes. At least that's how the Mustek scanners work. Byte explanation 0 0x08 (command code) 1 0x00 (whatever) 2 (size >> 16) & 0xff 3 (size >> 8) & 0xff 4 size & 0xff 5 magic (whatever) As far as I know 0x08 isn't in the SCSI (2) spec for scanners at all so you should expect all kinds of non-standard usage. Bye, Henning