Update megaram.vhd

Update OPLL module

Update vdp.vhd

Update OPLL module

Update psg_wave.vhd

Update vdp_sprite.vhd

Update megaram.vhd

Fixed NTSC/PAL Type flag

Fixed PSG volume table in logarithmic scale

Fixed NTSC/PAL Type flag

Comments on VGA interlaced mode

Update history.txt

Updated user manuals

Fix of mispelled text

Update history.txt

Update history.txt

Update history.txt

Update history.txt

Update history.txt

Minor update

Simplification 1st Gen

Improved Extended MegaROM Reading

Update special_keys.txt

Integration for access to 8 MB SDRAM

v3.9.2 [ALPHA13]

Update history.txt

Fixed comments

Fixed CTRL right key

Update switched io ports revision 11.pdf

Optimization of project executable files