F65510

Manufacturer Part NumberF65510
DescriptionControllers, Flat Panel VGA Controller
ManufacturerIntel Corporation
F65510 datasheet
 
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WRITE PROTECT REGISTER (XR15)
Read/Write at I/O Address 3B7h/3D7h
Index 15h
D7 D6 D5 D4 D3 D2 D1 D0
Wr Protect Group 1 regs
Wr Protect Group 2 regs
Wr Protect Group 3 regs
Wr Protect Group 4 regs
Wr Protect Group 5 regs
Wr Protect Group 6 regs
Wr Protect Group 0 regs
Wr Protect AR11
This register controls write protection for various
groups of registers as shown.
(default on Reset), 1= protected.
0
Write Protect Group 1 Registers
This bit affects the Sequencer registers
(SR00-04), Graphics Controller registers
(GR00-08),
and
Attribute
registers (AR00-14).
Note that AR11 is also protected by bit-7
which is ORed with this bit.
1
Write Protect Group 2 Registers
This bit affects CR09 bits 0-4, CR0A, and
CR0B.
2
Write Protect Group 3 Registers
This bit affects CR07 bit-4, CR08, CR11
bits 5-4, CR13, CR14, CR17 bits 0-1 and
bits 3-7, and CR18.
3
Write Protect Group 4 Registers
This bit affects CR09 bits 5-7, CR10, CR11
bits 0-3 and bits 6-7, CR12, CR15, CR16,
and CR17 bit-2.
4
Write Protect Group 5 Registers
This bit affects the Miscellaneous Output
register (3C2h) and the Feature Control
register (3BAh/3DAh).
5
Write Protect Group 6 Registers
This bit affects the RAMDAC registers
(3C6h-3C9h). If this bit is set, PALRD/ and
PALWR/ are disabled and all internal DAC
registers are also write protected.
Revision 0.7
6
7
0 = unprotected
Controller
81
Extension Registers
Write Protect Group 0 Registers
This bit affects CR0-7 (except CR07 bit-4).
This bit is logically ORed with CR11 bit-7.
Write Protect AR11
This bit is ORed with bit-0, therefore writing
to AR11 is possible only if both bit-0 and
bit-7 are 0.
Preliminary 65510