M69030 Asiliant Technologies, M69030 Datasheet - Page 159

• Manufacturer Part Number: M69030
• Manufacturer: Asiliant Technologies

Specifications of M69030

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Supplier Unconfirmed

GR01
read/write at I/O address 3CFh with index at address 3CEh set to 01h
shared by both pipelines A and B
7-4
3-0
GR02
read/write at I/O address 3CFh with index at address 3CEh set to 02h
shared by both pipelines A and B
7-4
3-0
`efmp
A
&
B
A
&
B

Reserved
Enable Set/Reset Plane 3 through Enable Set/Reset Plane 0
Reserved
Color Compare Plane 3 through Color Compare Plane 0
69030 Databook
7
7
Enable Set/Reset Register
Color Compare Register
0: The corresponding memory plane can be read from or written to by the CPU without any
special bitwise operations taking place.
1: The corresponding memory plane is set to 0 or 1 as specified in the Set/Reset Register
(GR00).
This register works in conjunction with the Set/Reset Register (GR00). The Write Mode bits
(bits 0 and 1) must be set for Write Mode 0 for this register to have any effect.
When the Read Mode bit (bit 3) of the Graphics Mode Register (GR05) is set to select Read
Mode 1, all 8 bits of each byte of each of the 4 memory planes of the frame buffer
corresponding to the address from which a CPU read access is being performed are
compared to the corresponding bits in this register (if the corresponding bit in the Color
Don’t Care Register (GR07) is set to 1). The value that the CPU receives from the read
access is an 8-bit value that shows the result of this comparison, wherein a value of 1 in a
given bit position indicates that all of the corresponding bits in the bytes across all of the
memory planes that were included in the comparison had the same value as their memory
plane’s respective bits in this register.
6
6
Reserved
Reserved
5
5
Graphics Controller Registers
4
4
Color Comp
Reset Pln 3
Enbl Set/
Plane 3
3
3
Color Comp
Reset Pln 2
Enbl Set/
Plane 2
2
2
Color Comp
Reset Pln 1
Enbl Set/
Plane 1
Revision 1.3 11/24/99
1
1
Color Comp
Reset Pln 0
Enbl Set/
Plane 0
0
0
11-3