OpenMSX alternative front-end debugger with V9990 support showcasing V9990's Ghosts'n Goblins by Assembler P1 mode both planes (A and B).
Debugger already supports B1 mode also.
This is a Work In Progress, but ideally will support all classic MSX video modes.
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https://www.youtube.com/watch?v=7BFKS3sMSBM