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Register Tables
TVP4020
Programmers Reference Manual
284
Appendix E. Register Tables
The following tables list registers by: unit, name and register address,
giving their tag values and indicating their type. The register groups may
be used to improve data transfer rates to PERMEDIA when using DMA.
The following types of register are distinguished:
•
Control: Set state and control bits ready to draw a primitive. This is
the default and is indicated by a blank entry in the “Type” column.
•
Command: Initiates some operation e.g. drawing of a primitive.
•
Mixed A control register which may also be used to supply successive
data values during download.
•
Output: An internal register that cannot be read or written, but whose
contents is passed to the Host Out FIFO under the control of certain
commands.
In addition the table indicates whether the register can be read back. A
blank entry in this column indicates that the register’s contents cannot
be read back.
The following table is a list of registers in unit order:
Unit
Register
Major Group (hex)
Offset
(hex)
Type
Readabl
e
Delta
V0Fixed[14]
20
0…D
•
V1Fixed[14]
21
0…D
•
V2Fixed[14]
22
0…D
•
V0Float[14]
23
0…D
•
V1Float[14]
24
0…D
•
V2Float[14]
25
0…D
•
DeltaMode
26
0
•
DrawTriangle
26
1
RepeatTriangle
26
2
DrawLine01
26
3
DrawLine10
26
4
RepeatLine
26
5
Rasterizer
StartXDom
00
0
•
dXDom
00
1
•
StartXSub
00
2
•
dXSub
00
3
•
StartY
00
4
•
dY
00
5
•
Count
00
6
•
Render
00
7
Command
ContinueNewLine
00
8
Command
ContinueNewDom
00
9
Command
ContinueNewSub
00
A
Command
Continue
00
B
Command
BitMaskPattern
00
D
Mixed
RectangleOrigin
01
A
RectangleSize
01
B
Summary of Contents for TVP4020 PERMEDIA 2
Page 1: ...Texas Instruments TVP4020 PERMEDIA 2 Programmer s Reference Manual Issue 4 ...
Page 284: ...TVP4020 Programmers Reference Manual A Gouraud Shaded Triangle 275 ...
Page 292: ...TVP4020 Programmers Reference Manual Register Tables 283 ...
Page 314: ...TVP4020 Programmers Reference Manual Index 305 ...
Page 315: ...Index TVP4020 Programmers Reference Manual 306 Index ...
Page 323: ...Index TVP4020 Programmers Reference Manual 314 ...