IDEDump 1.30
============

Test program to directly access IDE devices. The following keypresses are
recognised:

<- Z X ->  Decrement/Increment logical sector number
<- C V ->  Decrement/Increment cylinder number
<- N M ->  Decrement/Increment head number
<- , . ->  Decrement/Increment sector number

0          Select screen MODE 0
7          Select screen MODE 7
I          Identify device
T          Test transfer speed - reads a 64K burst of data from the drive
W          Toggle IDE data width between 8 bits and 16 bits
F          Flip between displaying low 256 bytes and high 256 bytes
D          Swap between drive 0/1 and 2/3 (device 0 and device 1)
H          Redisplay help text
S          Save data from IDE device to a file
L          Load data to IDE device from a file
<space>    Enter sector number
Escape     Terminate program

Identify
--------
This reads the device's identity data and displays parts of it as follows:

Physical: C:&09BC H:16 S:63
Logical:  C:&2654 H: 4 S:64
Size:     &xx265400  627968K  613M
Serial:   .3.6.6.4.0.3. . . . 
Firmware: .0...3. 
Model:    .U.N.U. .I.F.O.1.8.A. . . . . . . . . . 

With an 8-bit interface some of the information is missing. The missing
characters in the strings are displayed as '.'s. With the geometry set to
4*64 the 'size' value contains the bytes missing from the 'logical
cylinder' and vis versa. The Identify command fills in these missing bytes
from the other values, and calculates the missing top byte of the physical
cylinder count.

Some drives return the disk size incorrectly. Drives should return:
word &39: <size b0-b7><size b8-b15>   word &3A: <size b16-b23><size b24-b31>

Some drives return:
word &39: <size b16-b23><size b8-b15> word &3A: <size b0-b7><size b24-b31>

If word &3A is returned as zero, indicating a ridiculously small drive, the
Identify command swaps bytes &39 and &3A, and displays a '*' next to the
size.