M69030 Asiliant Technologies, M69030 Datasheet - Page 213

• 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

XRA1
read/write at I/O address 3D7h with index at I/O address 3D6h set to A1h
shadowed for pipelines A and B
7-0
XRA2
read/write at I/O address 3D7h with index at I/O address 3D6h set to A2h
shadowed for pipelines A and B
7-4
3-0
`efmp
A
B
A
B

Cursor 1 Vertical Extension
Cursor 1 Base Address Bits 15-12
Cursor 1 Pattern Select
69030 Databook
7
7
Cursor 1 Base Address Bits 15-12
Cursor 1 Base Address Bits 15-12
Cursor 1 Vertical Extension Register
Cursor 1 Base Address Low Register
When the vertical extension feature for cursor 1 is enabled by setting bit 3 of the Cursor 1
Control Register (XRA0) to 1, these 8 bits of this register are used to specify the height of
cursor 1 in scan lines. The number of scan lines must be a multiple of four.
This register should be programmed with a value derived from the following equation:
value = ((number of scanlines) ÷ (4) - 1
These four bits provide part of a 22-bit value that specifies the offset from the beginning of
the frame buffer memory space where the 4KB cursor data space for cursor 1 is to be
located. The six most-significant bits of this 22-bit value are supplied by the Cursor 1 Base
Address High Register (XRA3).
These four bits allow 1 of up to as many as 16 possible patterns contained in the cursor
data space for cursor 1 to be selected to be displayed.
The actual number of patterns depends on the size of each pattern, since the cursor data
space is limited to a total of 4KB in size. The size of each pattern depends, at least in part,
on the choice of cursor mode. See appendix D for more details concerning the cursor
modes.
6
6
(0000)
(0000)
5
5
Cursor 1 Vertical Extension
Cursor 1 Vertical Extension
Extension Registers
4
4
(00h)
(00h)
3
3
Cursor 1 Pattern Select
Cursor 1 Pattern Select
2
2
(0000)
(0000)
Revision 1.3 11/24/99
1
1
0
0
14-33