TMS9929 Video Display Processor

the video board consists of two parts, the digital part holding the decoder logic, the DRAM-replacement, clock generation and the TMS9929 itself. on the left side one can see the analog part of the circuit which converts the color differencing signal (YPrPb, not YUV!) from the VDP to a RGB signal (FBAS) which is supported by old crt TV’s and various old crt monitors like the C1084.

 

tms9929_sram

Videochip TMS9929 mit SRAM-Interface und nachgeschaltetem Konverter YPbPr nach RGB