MB86290A Datasheet, PDF (169/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

8.3.2 Interlaced Video Mode
AOUTx
HSYNC
VSYNC
EO(out)
VTR+1 rasters (odd field)
VSP+1 rasters
VDP+1 rasters
VSW+1 rasters
Assert Vsync Interrupt
AOUTx
HSYNC
VSYNC
EO(out)
VDP+1 rasters
VSP+1 rasters
VTR+1 rasters (even field)
VSW+1 rasters
Assert Frame Interrupt
Assert Vsync Interrupt
In the above diagram, VTR, HDP, etc., are the settings of their associated
registers.
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