I was corrected digital signal processing (DSP).
I was fixed VDP1 drawing process.
I was fixed vertical scroll cell processing.
I was fixed bitmap processing of surface of revolution.
I was fixed line color processing of the surface of revolution.
I was fixed window treatment.
I was fixed back screen processing.
I have modified the BIOS emulation process. Version save state data has changed. I was provided with the option to specify the number of threads VDP1 drawing. I can be processed in three threads maximum. I was provided with the option to be processed in a separate thread the DSP. I´ve lost the use of the processor specified thread. I removed the multi-thread-option of VDP2 drawing