![background image](http://html.mh-extra.com/html/texas-instruments/tvp4020-permedia-2/tvp4020-permedia-2_reference-manual_1097169012.webp)
TVP4020
Programmers Reference Manual
Overview
3
2.2
Functional Overview
2.2.1
Memory Subsystem
P
ERMEDIA
provides flexible support for the memory subsystem (Fig. 2.1).
This allows the system designer a wide choice of price/performance
tradeoffs.
The same physical memory holds all data used by P
ERMEDIA
. Internally
the data types are divided into texture, localbuffer and framebuffer. The
localbuffer holds depth and stencil data; the framebuffer holds color data
for display.
Bus
Interface
Memory
Interface
VGA
Graphics Hyperpipeline
Host Bus
SGRAM
Bypass
Figure 2.1
External Interfaces
2.2.2
Host Interface
Conceptually P
ERMEDIA
can be viewed as a register file. Control registers
are primed with the information required for a primitive, and then to start
the chip drawing, a write is made to a Command register
P
ERMEDIA
registers can be accessed directly through the memory map.
Registers can be accessed either individually or in groups.
The chip also supports a bypass route to the memory to allow direct
read/write of pixels, and implementation of algorithms not directly
supported by P
ERMEDIA
.
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 ...