M69030 Asiliant Technologies, M69030 Datasheet - Page 91

• 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

ST01
read-only at I/O Address 3BAh/3DAh
shadowed between both pipelines A and B
7
6
5-4
3
2-1
0
`efmp
A
B
VSYNC
VSYNC

Output
Output
VSYNC Output
Reserved
Video Feedback 1, 0
Vertical Retrace
Reserved
Display Enable
69030 Databook
7
Input Status Register 1
0: The VSYNC output pin is currently inactive.
1: The VSYNC output pin is currently active.
Note: This bit is largely unused by current software.
This bit returns the value of 0 when read.
These are diagnostic video bits that are programmably connected to two of the eight color
bits sent to the palette. Bits 4 and 5 of the Color Plane Enable Register (AR12) select which
two of the eight possible color bits become connected to these 2 bits of this register. The
current software normally does not use these 2 bits. They exist for EGA compatibility.
0: Indicates that a vertical retrace interval is not taking place.
1: Indicates that a vertical retrace interval is taking place.
These bits return the value of 0 when read.
0: Data for the active display area is being drawn to the display. Neither a horizontal
retrace interval nor a vertical retrace interval is currently taking place.
1: Either a horizontal or vertical retrace interval is currently taking place.
Reserved
Reserved
6
Video Feedback 1,0
Video Feedback 1,0
General Control and Status Registers
5
4
Retrace
Retrace
Vertical
Vertical
3
2
Reserved
Reserved
Revision 1.3 11/24/99
1
Display
Display
Enable
Enable
0
8-3