68 	OUTREG(BUS_CNTL, INREG(BUS_CNTL) | BUS_EXT_REG_EN);	// enable reg block 1  in Mach64_DisplayOverlay()
69 	OUTREG(OVERLAY_SCALE_CNTL, SCALE_EN);	// reset the video  in Mach64_DisplayOverlay()
76 		OUTREG(SCALER_COLOUR_CNTL, brightness | saturation << 8  in Mach64_DisplayOverlay()
78 		OUTREG(SCALER_H_COEFF0, 0x0002000);  in Mach64_DisplayOverlay()
79 		OUTREG(SCALER_H_COEFF1, 0xd06200d);  in Mach64_DisplayOverlay()
80 		OUTREG(SCALER_H_COEFF2, 0xd0a1c0d);  in Mach64_DisplayOverlay()
81 		OUTREG(SCALER_H_COEFF3, 0xc0e1a0c);  in Mach64_DisplayOverlay()
82 		OUTREG(SCALER_H_COEFF4, 0xc14140c);  in Mach64_DisplayOverlay()
113 	OUTREG(OVERLAY_GRAPHICS_KEY_MSK, keyMask);  in Mach64_DisplayOverlay()
114 	OUTREG(OVERLAY_GRAPHICS_KEY_CLR, keyColor);  in Mach64_DisplayOverlay()
115 	OUTREG(OVERLAY_KEY_CNTL, OVERLAY_MIX_FALSE | OVERLAY_MIX_EQUAL);  in Mach64_DisplayOverlay()
118 	OUTREG(OVERLAY_Y_X_START, OVERLAY_LOCK_START | (x1 << 16) | y1);  in Mach64_DisplayOverlay()
119 	OUTREG(OVERLAY_Y_X_END, (x2 << 16) | y2);  in Mach64_DisplayOverlay()
120 	OUTREG(OVERLAY_SCALE_INC, (horzScale << 16) | vertScale);  in Mach64_DisplayOverlay()
121 	OUTREG(SCALER_HEIGHT_WIDTH, (buffer->width << 16) | buffer->height);  in Mach64_DisplayOverlay()
122 	OUTREG(VIDEO_FORMAT, videoFormat);  in Mach64_DisplayOverlay()
128 		OUTREG(BUF0_OFFSET, offset);  in Mach64_DisplayOverlay()
129 		OUTREG(BUF0_PITCH, buffer->width);  in Mach64_DisplayOverlay()
131 		OUTREG(SCALER_BUF0_OFFSET, offset);  in Mach64_DisplayOverlay()
132 		OUTREG(SCALER_BUF0_PITCH, buffer->width);  in Mach64_DisplayOverlay()
135 	OUTREG(OVERLAY_SCALE_CNTL, SCALE_PIX_EXPAND | OVERLAY_EN | SCALE_EN);  in Mach64_DisplayOverlay()
144 	OUTREG(OVERLAY_SCALE_CNTL, SCALE_EN);	// reset the video  in Mach64_StopOverlay()