M69030 Asiliant Technologies, M69030 Datasheet - Page 153

• 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

SR03
read/write at I/O address 3C5h with index at address 3C4h set to 03h
shared by both pipelines A and B
Note: In text modes, bit 3 of the video data’s attribute byte normally controls the foreground intensity. This
bit may be redefined to control switching between character sets. This latter function is enabled whenever
there is a difference in the values of the Character Font Select A and the Character Font Select B bits. If
the two values are the same, the character select function is disabled and attribute bit 3 controls the
foreground intensity.
7-6
5, 3-2
`efmp
A
&
B

Reserved
Character Map Select Bits for Character Map A
69030 Databook
7
Reserved
Character Map Select Register
These three bits are used to select the character map (character generator tables) to be
used as the secondary character set (font). Note that the numbering of the maps is not
sequential.
3 2
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Bit
6
Bit 5
0
1
0
1
0
1
0
1
Select (bit 0)
Char Map A
5
Map Number
0
4
1
5
2
6
3
7
Sequencer Registers
Select (bit 0)
Char Map B
4
Character Map A Select
3rd 8KB of plane 2 at offset 16K
4th 8KB of plane 2 at offset 24K
5th 8KB of plane 2 at offset 32K
6th 8KB of plane 2 at offset 40K
7th 8KB of plane 2 at offset 48K
8th 8KB of plane 2 at offset 56K
2nd 8KB of plane 2 at offset 8K
1st 8KB of plane 2 at offset 0
3
(bits 2 and 1)
Table Location
2
Character Map B Select
Revision 1.3 11/24/99
1
(bits 2 and 1)
0
10-5