This release implements a simple shader processor that allows
handling graphics at the level of small bundles of triangles. A
custom development tool chain was created, including a compiler. A
simple software only rendering pipeline is provided running on the
shader processor.
R5 Shader
Processor Design Document (v2a)
| File |
License |
md5sum |
Notes |
| tvc-20141218.tgz | Varies - see each file in archive for license |
514f7542862f393aec43348f41d9a22d |
Archive contains symbolic links and named
pipes |
This release implements hardware texture mapping using a nearest
pixel selection in 256x256 pixel textures. A control bus has
been implemented that simplifies the epp control unit and makes
most of the design independant of the parallel port.
|
|
|
| File |
License |
md5sum |
| tvc-20090311.zip | Public Domain |
0caaf418af6f66e7a6bd3fbde6a0a0fc |
| File |
License |
md5sum |
| tvc-20090222.zip | Public Domain |
f178f4d04a23d3b9b2e8dc791cc89cc1 |
This release most importantly adds a Z-buffered polygon scanline routine to the TVC. The MCU has been improved to allow unaligned access to the framebuffer and a real scheduler has built into it to fairly share the framebuffer between memory users and yet give the display priority access to pixel data. A simple C++ 3d engine (included) drives the TVC and spins a flat shaded utah teapot about its y axis in one degree increments. The driver software now only flushes epp data registers that have changed to the TVC. A block set memory user has been added to speed clearing the front and Z buffer. The rp_writer memory user has been removed partly for logic space constraints. The development hardware is unchanged from Release #1.
In order to compile the demo / 3d engine / driver combination you will need the libImg library from here. Untar libImg in the previously extracted driver directory, cd into libImg; ./configure and make to compile libImg first, then cd .. and make all to compile. The make process builds two executables; engine and tvc. Engine renders the spinning teapot in a 640x480 window in X. Engine was used to develop the rasterization routines. Tvc is the acual driver program for the development hardware. Tvc presents a simple menu in a terminal to exercise the hardware functional units. You will need to also download the teapot.off file below and put it in the cwd so tvc and engine can find the needed geometry data.
Extract the zip archive then see the file tvc.odt (OpenOffice Text Document) in the tvc-docs directory for more extensive project documentation.
 |
The movie above was captured using a webcam. The cheap lens on the webcam causes some geometric distortion.
Several pics from Release #1 are still relevant. The scope CAS pic is unchanged from Release #1. Release #2 has fixed/removed some of the visual artifacts seen in the solid fill and software rasterized lines. The solid fill proceeds much faster than before (probably too fast to capture well).
| File |
License |
md5sum |
| tvc-20060917.zip | Public Domain |
7b4f751b48d97bc4889cdb69a2868acb |
| teapot.off | Unknown copyright status. Random google find. |
111ff5c87937260a402c87dc6fee9e72 |
| File |
License |
md5sum |
| tvc-20060613.zip | Public Domain |
f5126da797119bfdda03ec12d21b102a |
This was a confidence building exercise to be sure I could learn VHDL well enough to do anything useful. It just generates a test pattern on a VGA display.
| File |
License |
md5sum |
| tvc-pre-release-1.zip | Public Domain |
b873152eb3d06013fdcf2d4e5e1ff458 |
