Geode GXLV Processor Series Low Power Integrated x86 Solutions

Geode GXLV Processor SeriesIntegrated Functions (Continued)GX_BASE+Memory Offset Type Name/FunctionTable 4-28. Display Controller Register Summary (Continued)8328h-832Bh R/W DC_BUF_SIZEDisplay Controller Buffer Size: Specifies the number of bytes to transfer for a line of framebuffer data and the size of the compressed line buffer. (The compressed line buffer will beinvalidated if it exceeds the CB_LINE_SIZE, bits [15:9].)xxxxxxxxh832Ch-832Fh -- Reserved 00000000hTiming Registers8330h-8333h R/W DC_H_TIMING_1Display Controller Horizontal and Total Timing: Horizontal active and total timinginformation.xxxxxxxxh8334h-8337h R/W DC_H_TIMING_2Display Controller CRT Horizontal Blanking Timin: CRT horizontal blank timinginformation.8338h-833Bh R/W DC_H_TIMING_3Display Controller CRT Sync Timing: CRT horizontal sync timing information. Note, however,that this register should also be programmed appropriately for flat panel only displaysince the horizontal sync transition determines when to advance the vertical counter.833Ch-833Fh R/W DC_FP_H_TIMINGDisplay Controller Flat Panel Horizontal Sync Timing: Horizontal sync timing information foran attached flat panel display.8340h-8343h R/W DC_V_TIMING_1Display Controller Vertical and Total Timing: Vertical active and total timing information.The parameters pertain to both CRT and flat panel display.8344h-8247h R/W DC_V_TIMING_2Display Controller CRT Vertical Blank Timing: Vertical blank timing information.8348h-834Bh R/W DC_V_TIMING_3Display Controller CRT Vertical Sync Timing: CRT vertical sync timing information.834Ch-834Fh R/W DC_FP_V_TIMINGDisplay Controller Flat Panel Vertical Sync Timing: Flat panel vertical sync timinginformation.DefaultValuexxxxxxxxhxxxxxxxxhxxxxxxxxhxxxxxxxxhxxxxxxxxhxxxxxxxxhxxxxxxxxhCursor and Line Compare Registers8350h-8353h R/W DC_CURSOR_XDisplay Controller Cursor X Position: X position information of the hardware cursor.8354h-8357h RO DC_V_LINE_CNTDisplay Controller Vertical Line Count: This read only register provides the current scanlinefor the display. It is used by software to time update of the frame buffer to avoid tearing artifacts.8358h-835Bh R/W DC_CURSOR_YDisplay Controller Cursor Y Position: Y position information of the hardware cursor.835Ch-835Fh R/W DC_SS_LINE_CMPDisplay Controller Split-Screen Line Compare: Contains the line count at which the lowerscreen begins in a VGA split-screen mode.xxxxxxxxhxxxxxxxxhxxxxxxxxhxxxxxxxxh8360h-8363h -- Reserved xxxxxxxxh8364h-8367h -- Reserved xxxxxxxxh8368h-836Bh -- Reserved xxxxxxxxh836Ch-836Fh -- Reserved xxxxxxxxhwww.national.com 142 Revision 1.3