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171 lines
6.0 KiB
171 lines
6.0 KiB
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/*[
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*
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* File : vgastate.h
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*
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* Derived from: (original)
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*
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* Purpose : Definition of data types/constants to save and restore the
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* (internal) state of a VGA card.
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*
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* Author : Rog
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* Date : 25 November 1992
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*
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* SCCS Gumph : @(#)vgastate.h 1.1 08/06/93
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*
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* (c) Copyright Insignia Solutions Ltd., 1992 All rights reserved
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*
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* Modifications :
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*
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]*/
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#ifndef _VGASTATE_H_
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#define _VGASTATE_H_
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/*(
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*
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* typedef : vgastate structure
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*
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* purpose : provides storage for all the registers and data associated with
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* any (S)VGA card
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*
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* Format : The first part of the structure is a header consisting of arrays
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* for all the standard VGA registers. There is also an array to
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* hold the values of the IO ports between 0x3b0 and 0x3e0 (a VGA
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* uses 3ba-3cc)
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* There is then a set of sizes of and pointers to arrays to hold
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* data contained in any extra registers added to the standard set
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* for SVGA cards and a general extra data area.
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* Finally there is a field for the size of the planes and an array
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* of pointers to copies of the plane data.
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*
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* All this data is held starting at the last field in the
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* structure (Data[])
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*
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* Pointers should be NULL if they do not point to valid data
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*
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* Total size of data will be
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* sizeof( VGAState ) + extendSequencerSize + extendCRTSize
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* + extendGraphSize + extendAttrSize + extendDACSize
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* + miscDataSize + ( 4 * planeSize )
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)*/
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typedef struct
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{
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unsigned char ioPorts[ 0x30 ]; /* IO Ports 3B0 - 3E0 */
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unsigned char sequencerData[ 5 ]; /* Sequencer registers */
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unsigned char CRTContData[ 24 ]; /* CRT Controller registers */
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unsigned char graphContData[ 9 ]; /* Graphics controller regs */
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unsigned char attrContData[ 15 ]; /* Attribute Controller regs */
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unsigned char DACData[ 3 * 256 ]; /* Data values from PEL Data reg */
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unsigned int latch; /* 32 bit data latch register */
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unsigned int extendSequencerSize; /* size in bytes of extra sequencer data */
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unsigned char * extendSequencerData; /* pointer to extra sequencer regs */
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unsigned int extendCRTSize; /* size in bytes of extra CRT data */
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unsigned char * extendCRTData; /* Pointer to extra CRT controller regs */
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unsigned int extendGraphSize; /* size in bytes of extra graph cont data */
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unsigned char * extendGraphData; /* pointer to extra Graph controller data */
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unsigned int extendAttrSize; /* size in bytes of extra attr cont data */
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unsigned char * extendAttrData; /* pointer to extra attribute cont data */
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unsigned int extendDACSize; /* size in bytes of extra sequencer data */
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unsigned char * extendDACData; /* Pointer to extra DAC data */
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unsigned int miscDataSize; /* Any other random junk */
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unsigned char * miscData;
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unsigned int planeSize; /* Size in bytes of each plane */
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unsigned char * planeData[ 4 ]; /* Pointers to copies of plane data */
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unsigned char data[ 1 ]; /* Data holder */
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} VGAState , *pVGAState;
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/* Macros for gettting at the register values in the IoPort array */
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#define miscOutputWrite ioPorts[ 0x12 ]
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#define miscOutputRead ioPorts[ 0x1C ]
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#define EGAFeatureContWrite ioPorts[ 0x2A ]
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#define VGAFeatureContWrite ioPorts[ 0x0A ]
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#define featureContRead ioPorts[ 0x1A ]
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#define inputStat0 ioPorts[ 0x12 ]
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#define colourInputStat1 ioPorts[ 0x2A ]
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#define monoInputStat1 ioPorts[ 0x0A ]
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#define sequencerIndex ioPorts[ 0x14 ]
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#define sequencer ioPorts[ 0x15 ]
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#define CRTIndexEGA ioPorts[ 0x24 ]
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#define CRTIndexVGA ioPorts[ 0x04 ]
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#define graphContIndex ioPorts[ 0x1E ]
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#define graphCont ioPorts[ 0x1F ]
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#define attrContIndexWrite ioPorts[ 0x10 ]
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#define attrContIndexRead ioPorts[ 0x11 ]
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#define attrCont ioPorts[ 0x1F ]
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#define PELAddrWriteMode ioPorts[ 0x18 ]
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#define PELAddrReadMode ioPorts[ 0x17 ]
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#define PELData ioPorts[ 0x19 ]
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#define DACState ioPorts[ 0x17 ]
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#define PELMask ioPorts[ 0x16 ]
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/* Macros for the Sequencer Registers */
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#define seqReset sequencerData[ 0 ]
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#define seqClockMode sequencerData[ 1 ]
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#define seqMapMask sequencerData[ 2 ]
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#define seqCharMapSel sequencerData[ 3 ]
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#define seqMemMode sequencerData[ 4 ]
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/* Macros for the CRT controller registers */
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#define horizTotal CRTContData[ 0 ]
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#define horizDisplayEnd CRTContData[ 1 ]
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#define startHorizBlank CRTContData[ 2 ]
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#define endHorizBlank CRTContData[ 3 ]
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#define startHorizRetrace CRTContData[ 4 ]
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#define endHorizRetrace CRTContData[ 5 ]
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#define vertTotal CRTContData[ 6 ]
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#define overflow CRTContData[ 7 ]
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#define presetRowScan CRTContData[ 8 ]
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#define maxScanLine CRTContData[ 9 ]
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#define cursorStart CRTContData[ 10 ]
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#define startAddressHigh CRTContData[ 11 ]
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#define startAddressLow CRTContData[ 12 ]
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#define cursLocHigh CRTContData[ 13 ]
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#define cursLocLow CRTContData[ 14 ]
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#define vertRetStart CRTContData[ 15 ]
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#define vertRetEnd CRTContData[ 16 ]
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#define vertDisplayEnd CRTContData[ 17 ]
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#define CRToffset CRTContData[ 18 ]
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#define underlineLoc CRTContData[ 19 ]
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#define startVertBlank CRTContData[ 20 ]
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#define endVertBlank CRTContData[ 21 ]
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#define CRTModeControl CRTContData[ 22 ]
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#define lineCompare CRTContData[ 23 ]
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/* Macros for Graphics Controller */
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#define setReset graphContData[ 0 ]
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#define enableSetReset graphContData[ 1 ]
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#define colourCompare graphContData[ 2 ]
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#define dataRotate graphContData[ 3 ]
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#define readMapSelect graphContData[ 4 ]
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#define GCmode graphContData[ 5 ]
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#define GCmisc graphContData[ 6 ]
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#define CDC graphContData[ 7 ]
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#define GCBitMask graphContData[ 8 ]
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/* The Attribute controller registers */
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#define Palette AttrContData /* POINTER ! */
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#define AttrModeControl AttrContData[ 16 ]
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#define OverscanColour AttrContData[ 17 ]
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#define ColourPlaneEnable AttrContData[ 18 ]
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#define HorizPixPan AttrContData[ 19 ]
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#define ColourSelect AttrContData[ 20 ]
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/* Numbers of the various Registers in the Standard VGA Emulation */
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#define NUM_SEQ_REGS 5
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#define NUM_CRT_REGS 24
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#define NUM_GRAPH_REGS 9
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#define NUM_ATT_REGS 15
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#define DAC_ENTRIES 3 * 256
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#endif /* _VGASTATE_H_ */
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