=> R0 = 2
R1 = device ID
R2 -> buffer for description, (16 bytes, word aligned).
<= Buffer filled in
Potential errors:
&00020105 - Invalid SCSI device ID
&0002010A - Timeout
Performs an Inquiry command to see what type the device
is and then performs the appropriate Read-Capacity
command depending on the device type.
SCSI_Initialise 2, R2 buffer contents
Offset /Meaning/
0 Type
1 Removable medium Bit (Bit7)/Device-Type Qualifier (Bits 0..6)
2 ISO (b7..6)/
ECMA (b5..3)/
ANSI (b2..0) version
3 Reserved (reserved field returned by inquiry command)
4 Additional length, extra data that could be obtained by an inquiry command
5..7 Reserved (by device driver - currently zero)
8..11 word highest logical block number } converted to normal
12..15 word block length } ARM byte sex
Bytes 0..4 are the first 5 bytes returned by an inquiry command, byte 5 is
provided to indicate how much additional data (vendor ID,product ID etc)
could be obtained by an Inquiry command Bytes 5..7 are reserved by the
device driver
Bytes 8..11 (word 2) & 12..15 (word 3) are the highest block count and block
size returned by a Read Capacity command but have had the byte sex reversed
to suit ARM's LDR instruction.
SCSI_Initialise, device type.
&00 Direct-access (eg magnetic disk)
&01 Sequential-access (eg magnetic tape)
&02 Printer device
&03 Processor device
&04 Write-once read-multiple (eg some optical discs)
&05 Read-only (eg some optical discs)
&06-7E Reserved
&7F Logical unit not present
&80-FF Vendor unique
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