Production Version

 

The prototype video boards had demonstrated that the V9958 was going to work well for MTXPlus⁺ and were also used to develop the automated wait generation logic required to allow the V9958 to operate at the maximum CPU speed of the system.

A number of small changes to the board were also made for the production board

• S-Video, Audio and SCART (using a 15-pin D socket) connectors were added to the PCB

• The header for connection to an external SCART connector was retained

• A header was added for the V9958 Colour Bus (for future use)

 

The KiCAD schematic of the PCB
The KiCAD model of the PCB prior to manufacture

 

 

 

 

 

References:

Roger Samdal's Spectravideo site, VDP page

GR8BIT project, Eugeny Brychkov, GR8BIT Knowledge Base article on adding Composite and S-Video output (KB0014).