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Hi all,

I've returned to a project of a few weeks ago, and run straight into
a problem

After finding some SDHC cards I bought had partitions, I was advised
to find the MBR by using the LBA information in the partition table, like
so

read_fat:  clr     sec_adr_lo              ;sector 0
           clr     sec_adr_hi
           mov     #ram2,w8
           call    getsector               ;read sector into 512 bytes RAM

;find Boot Sector / Root Directory

           mov     ram2,w0                 ;test first byte of sector 0
           bra     z,partition             ;if 0, then MBR + partition, rea=
d
0x1c6 - 0x1c9
           ......

partition: mov     ram2+#0x1c6,w0          ;fetch 0x1c6 and 0x1c7, LSW
           mov     w0,sec_adr_lo
           mov     ram2+#0x1c8,w0          ;fetch 0x1c8 and 0x1c9, MSW
           mov     w0,sec_adr_hi
           mov     #ram2,w8
           call    getsector               ;read sector

In the attached picture, of a 4GB, Frhed shows that the MBR is at
sector 0x2000 (or 0x2000 * 0x200 bytes/sector =3D byte 0x400000),
as 0x1c6/0x1c8 say, yet requesting that sector returns nothing

What am I missing ? I've tried reseting/re-initialising the card and
reading sector 0x2000 but with the same result

TIA

Joe=20

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