Jameco Electronics Rabbit 3000 User Manual
Page 295
286
Rabbit 3000 Microprocessor
Table B-8. Write Protect High Register
Write Protect High Register
(WPHR)
(Address = 0x0461)
Bit(s)
Value
Description
7
0
Disable 64K write-protect for physical address 0xF0000–0xFFFFF.
1
Enable 64K write-protect for physical address 0xF0000–0xFFFFF.
6
0
Disable 64K write-protect for physical address 0xE0000–0xEFFFF.
1
Enable 64K write-protect for physical address 0xE0000–0xEFFFF.
5
0
Disable 64K write-protect for physical address 0xD0000–0xDFFFF.
1
Enable 64K write-protect for physical address 0xD0000–0xDFFFF.
4
0
Disable 64K write-protect for physical address 0xC0000–0xCFFFF.
1
Enable 64K write-protect for physical address 0xC0000–0xCFFFF.
3
0
Disable 64K write-protect for physical address 0xB0000–0xBFFFF.
1
Enable 64K write-protect for physical address 0xB0000–0xBFFFF.
2
0
Disable 64K write-protect for physical address 0xA0000–0xAFFFF.
1
Enable 64K write-protect for physical address 0xA0000–0xAFFFF.
1
0
Disable 64K write-protect for physical address 0x90000–0x9FFFF.
1
Enable 64K write-protect for physical address 0x90000–0x9FFFF.
0
0
Disable 64K write-protect for physical address 0x80000–0x8FFFF.
1
Enable 64K write-protect for physical address 0x80000–0x8FFFF.
Table B-9. Write Protect Segment x Register
Write Protect Segment x Register
(WPSAR)
(Address = 0x0480)
(WPSBR)
(Address = 0x0484)
Bit(s)
Value
Description
7:4
These bits are reserved and should be written with all zeros.
3:0
When these four bits match bits [19:16] of the physical address, write-protect
that 64K range in 4K increments using WPSxLR and WPSxHR.