|
|
|
|
 |
The Memotech MTX Series |
 |
Memotech Photos - Multi-Effect Video Wall
|
Multi-Effect Video
Wall Pictures -
courtesy of Mike Rudkin |
|
|
|
| The MTX computer used for the Video Wall
System. You can just make out the Cameron Video Systems
logo on the left hand side of the keyboard label,
probably just stuck over the original Memotech one.
Most were MTX512 Series 2s, but I think
some were also the RS128 model. |
 |
| Photo of the MTX Video Wall computer
internals, showing the main board, a ROM card and a
cut-down RS232 interface which lacks the interface
components used for the FDX etc. The additional ROMs
allowed the system to boot into the Video Wall system
without the need for the optional SDX disk drive. |
 |
| The internals of the Video Wall
Controller.
Each half of this controller has 4 or 5 Frame Memory
boards and a Controller board. The controller boards
were multi-dropped on the ribbon
cable connected to the MTX Centronics interface which is
visible next to the silver UHF modulator in the photo
above. The frame buffer box looked very much like an
FDX case, it was variously described as the "Black Magic
box" or the "DDFS Control Unit". |
 |
| The Video Wall controller also had a second,
smaller, "Black Magic" box, this was a
composite video decoder. Its function was to take the
composite video signal and split the components into (R)ed,
(G)reen, (B)lue and (S)ync -
RGBS. The lower board is the demodulator board, it accepted a
composite video input and output RGBS for the Video Wall
controller. The large chip in the middle of the board is
a ST Microelectronics PAL/NTSC One Chip Decoder,
TDA3562A.
I have seen pictures of two different designs for the
second control box, Peter Kretzschmar's
Video Wall has a simple video amplifier/splitter board
installed with the demodulator board. Mike's board shown
here has a much more complex Distribution Amplifier board
- this one has eight RGB outputs. |
 |
|
 |
|
