Digital Equipment DECmpp12000, Reference Manual

Page: 121 / 156

A.3 System Configuration Table
A.3.7 System Area RFT and GET Pages
Entries in the RFT and GET are in ascending sorted order.
The 256 bytes of a RFT or GET page are organized as follows:
Byte Offset RW Type Name Value
00h RO F/Cylinder 00h . . . 8Fh (byte 1)
01h RO Cylinder 00h . . . FFh (byte 0)
02h RO Head 00h . . . FFh
03h RO Reserved 00h . . . FFh
04h RO Position 00h . . . FFh (byte 1)
05h RO Position 00h . . . FFh (byte 0)
06h RO Bit Length 00h . . . FFh (byte 1)
07h RO Bit Length 00h . . . FFh (byte 0)
08h RO F/Cylinder 00h . . . 8Fh (byte 1)
09h RO Cylinder 00h . . . FFh (byte 0)
0Ah RO Head 00h . . . FFh
0Bh RO Reserved 00h . . . FFh
0Ch RO Position 00h . . . FFh (byte 1)
0Dh RO Position 00h . . . FFh (byte 0)
0Eh RO Bit Length 00h . . . FFh (byte 1)
0Fh RO Bit Length 00h . . . FFh (byte 0)
..
.
..
.
..
.
..
.
F8h RO F/Cylinder 00h . . . 8Fh (byte 1)
F9h RO Cylinder 00h . . . FFh (byte 0)
FAh RO Head 00h . . . FFh
FBh RO Reserved 00h . . . FFh
FCh RO Position 00h . . . FFh (byte 1)
FDh RO Position 00h . . . FFh (byte 0)
FEh RO Bit Length 00h . . . FFh (byte 1)
FFh RO Bit Length 00h . . . FFh (byte 0)
Eight bytes of FFh follow the last valid flaw address, followed by all 0’s until the
table ends.
If set, F bit (bit 15) of the cylinder indicates a bad track.
Configuration Data A–21