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cmdcnst.h
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00001 /* 00002 * PROJECT: ReactOS VGA Miniport Driver 00003 * LICENSE: Microsoft NT4 DDK Sample Code License 00004 * FILE: boot/drivers/video/miniport/vga/cmdcnst.h 00005 * PURPOSE: Command Code Definitions for VGA Command Streams 00006 * PROGRAMMERS: Copyright (c) 1992 Microsoft Corporation 00007 */ 00008 00009 00010 //-------------------------------------------------------------------------- 00011 // Definition of the set/clear mode command language. 00012 // 00013 // Each command is composed of a major portion and a minor portion. 00014 // The major portion of a command can be found in the most significant 00015 // nibble of a command byte, while the minor portion is in the least 00016 // significant portion of a command byte. 00017 // 00018 // maj minor Description 00019 // ---- ----- -------------------------------------------- 00020 // 00 End of data 00021 // 00022 // 10 in and out type commands as described by flags 00023 // flags: 00024 // 00025 // xxxx 00026 // |||| 00027 // |||+-------- unused 00028 // ||+--------- 0/1 single/multiple values to output (in's are always 00029 // |+---------- 0/1 8/16 bit operation single) 00030 // +----------- 0/1 out/in instruction 00031 // 00032 // Outs 00033 // ---------------------------------------------- 00034 // 0 reg:W val:B 00035 // 2 reg:W cnt:W val1:B val2:B...valN:B 00036 // 4 reg:W val:W 00037 // 6 reg:W cnt:W val1:W val2:W...valN:W 00038 // 00039 // Ins 00040 // ---------------------------------------------- 00041 // 8 reg:W 00042 // a reg:W cnt:W 00043 // c reg:W 00044 // e reg:W cnt:W 00045 // 00046 // 20 Special purpose outs 00047 // 00 do indexed outs for seq, crtc, and gdc 00048 // indexreg:W cnt:B startindex:B val1:B val2:B...valN:B 00049 // 01 do indexed outs for atc 00050 // index-data_reg:W cnt:B startindex:B val1:B val2:B...valN:B 00051 // 02 do masked outs 00052 // indexreg:W andmask:B xormask:B 00053 // 00054 // F0 Nop 00055 // 00056 //--------------------------------------------------------------------------- 00057 00058 // some useful equates - major commands 00059 00060 #define EOD 0x000 // end of data 00061 #define INOUT 0x010 // do ins or outs 00062 #define METAOUT 0x020 // do special types of outs 00063 #define NCMD 0x0f0 // Nop command 00064 00065 00066 // flags for INOUT major command 00067 00068 //#define UNUSED 0x01 // reserved 00069 #define MULTI 0x02 // multiple or single outs 00070 #define BW 0x04 // byte/word size of operation 00071 #define IO 0x08 // out/in instruction 00072 00073 // minor commands for metout 00074 00075 #define INDXOUT 0x00 // do indexed outs 00076 #define ATCOUT 0x01 // do indexed outs for atc 00077 #define MASKOUT 0x02 // do masked outs using and-xor masks 00078 00079 00080 // composite inout type commands 00081 00082 #define OB (INOUT) // output 8 bit value 00083 #define OBM (INOUT+MULTI) // output multiple bytes 00084 #define OW (INOUT+BW) // output single word value 00085 #define OWM (INOUT+BW+MULTI) // output multiple words 00086 00087 #define IB (INOUT+IO) // input byte 00088 #define IBM (INOUT+IO+MULTI) // input multiple bytes 00089 #define IW (INOUT+IO+BW) // input word 00090 #define IWM (INOUT+IO+BW+MULTI) // input multiple words 00091 00092 /* EOF */
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