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The T1818P is a NoC, used in russian clone Dendy. Unlike UM6561 it has no SRAM inside, so it required external SRAM. But it has full set of pins for controllers and even EXT port. You can trace it using this images of board: Top Bottom Internal 1st joypad in your clone is that little PCB. You should...

Of course here no negative values at RGB output to the tube. Because the last stage with DC path. And at this stage does secondary recover black level right before x-Y signals meets with Y. Before this all paths separated with capacitors, so they have negative signals, like any other amplifiers does...

None. TVs recover black level from front porch. Where color burst placed. Manipulating with this level was a copy protection at that years. And that's why "darker than black" color a present: Luma0 is lower than black level . On CRT TV you can see that luma level only if add some brightness. Black l...

And true: 32 bit access must be word aligned as 16 bit access, because M68000 has only 16 bit data bus and split 32 bit access into 2 of 16 bit access. For M68000 only 8 bit access can be not aligned by word.

So, what is the first result of a LDA 2007 (when there is no previous read)? Zero? It depends on whether the PPU initializes that buffer with anything during its power up sequence, buy I don't see why they'd waste resources on something like that. The first $2007 read result will be $00, as documen...

Why do you ask this here?

Analog TV has no any horizontal "pixels", only vertical by scanline count. There is only high frequency limit, that will describe how smallest object can be shown (video clarity). For 576i it is ~5,5MHz for BW only luma and <4MHz with PAL color encoding. For 480i as far I know it will be ~5MHz for B...

They are all used. Not new. But they all seems working fine.

I've got right palette with phase 8 in CPLD generator. Here is verilog: module PAL_NTSC_Gen( input NTSC_Clk, // 21.4772 MHz input PAL_Clk, // 53.2034 MHz output [7:0]DAC, output [3:0]COUT, output [12:1]PHOUT ); // For test purpose assign COUT[3:0] = HCOUNT[7:4]; assign PHOUT[12:1] = PH[12:1]; // Рег...

2- An AGC, if even active on an S-Video input, will not care about the chroma and luma components relative to each other . That's the entire point of S-Video. There is AGC in RGB matrix and amplifier right before CRT. This is where luma from your S-Video meets with chroma from decoder. Also there h...

Not unequivocal for me. You violate raster timing and many AGC's in monitor/TV getting mad. For example, black level restorer, that use front porch for it (where color burst placed). Now. Working on BreakNES project, we discovered this level assignment: LEVEL : SYNC : BURST : LUMA0 : LUMA1 : LUMA2 :...

I presume you are doing NTSC signal to RGB conversions. The code I pasted generates 32-bit integers where certain eight bits represent blue, certain eight bits represent green, and certain eight bits represent red. (Lowest-order eight bits are red IIRC.) It's up to the user to ensure they map the r...

Bisqwit wrote:Make sure your blue and red are not swapped (RGB v.s. BGR).

How can it possible? It's just a 12 square waveforms with linear phase shift.