Z80 MSX Speed Up testing

Now Z80 MSX card runs on 3.58Mhz as well.

But, I would like to test if it could run above the 3.58Mhz.

Now, I've tested it the 7Mhz, It is exactly 2 time clock of the MSX1.

WOW,

It's running.

The ticks just 42 now, (Original MSX takes 88)

But, It failed running GAME ROM.

I guess VDP failed to run on the 7Mhz.

So, I slight slow down it to 5Mhz.

It runs and took 60ticks but lessthan 88 ticsk.

Tested Game ROM too,

It works but, failing some sprite display.

I think that it is really fail to run VDP.

I want to make 4Mhz but, can't do it with APPLE II clock.

Someday will test with 4Mhz.

Maybe 4Mhz will run fine.

I'm testing 3.58Mhz MSX running mode but, even slight faster would be better than just normal as the MSX1.

Thanks