The V36 graphics.library supports the new genlock capabilities of the enhanced Denise chip in PAL or NTSC modes. Any color registers may be chosen as controlling video overlay (COLORKEY). A single bitplane may be chosen to control video overlay as well (BITPLANEKEY). The border areas surrounding the active display window may also be set to be opaque or transparent. BPLCON0 W A,D Bitplane control (miscellaneous control bits) BPLCON1 W D Bitplane control (horizontal scroll control) BPLCON2 W D Bitplane control (video priority control) BPLCON3 W D Bitplane control (enhanced features) Bit BPLCON0 BPLCON1 BPLCON2 BPLCON3 ---- -------- -------- -------- -------- 15 14 ZDBPSEL2 \ 13 ZDBPSEL1 } Select bitplane 12 ZDBPSEL0 / 11 ZDBPEN Use BITPLANEKEY 10 ZDCTEN Use COLORKEY 09 KILLEHB Kill halfbrite 08 07 06 05 BRDRBLNK Border blank 04 BRDNTRAN Border opaque 03 02 01 00 ENBPLCN3 Enable new BLPCON3 register. The ECS genlock features are enabled on a ViewPort by ViewPort basis. Warning: -------- Genlock has been designed to work with NTSC and PAL modes only. Genlock and 31 KHz programmable scan rates are not compatible modes.
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