taking picture of PC-FX isn't working properly

[dshadoff]

In the FX Megavault program, the 7up processor is set to 7MHz (341 horiz resolution), but the KING processor is locked at 256.

Taking pictures using Mednafen's snap function produces odd results:
F9 (raw) -> output is 1024 x 253 , and looks seriously distorted
Shift-F9 (with filters, etc.) -> output has the correct aspect ratio, but it all black.

Not sure if this issue is unique to the 7MHz 7up mode, or all modes.