win32ss/drivers/miniport/vga_new/cmdcnst.h

   1 /*
   2  * PROJECT:         ReactOS VGA Miniport Driver
   3  * LICENSE:         Microsoft NT4 DDK Sample Code License
   4  * FILE:            boot/drivers/video/miniport/vga/cmdcnst.h
   5  * PURPOSE:         Command Code Definitions for VGA Command Streams
   6  * PROGRAMMERS:     Copyright (c) 1992  Microsoft Corporation
   7  */
   8
   9
  10 //--------------------------------------------------------------------------
  11 //   Definition of the set/clear mode command language.
  12 //
  13 //   Each command is composed of a major portion and a minor portion.
  14 //   The major portion of a command can be found in the most significant
  15 //   nibble of a command byte, while the minor portion is in the least
  16 //   significant portion of a command byte.
  17 //
  18 //   maj  minor      Description
  19 //   ---- -----      --------------------------------------------
  20 //   00              End of data
  21 //
  22 //   10              in and out type commands as described by flags
  23 //        flags:
  24 //
  25 //        xxxx
  26 //        ||||
  27 //        |||+-------- unused
  28 //        ||+--------- 0/1 single/multiple values to output (in's are always
  29 //        |+---------- 0/1 8/16 bit operation                  single)
  30 //        +----------- 0/1 out/in instruction
  31 //
  32 //       Outs
  33 //       ----------------------------------------------
  34 //       0           reg:W val:B
  35 //       2           reg:W cnt:W val1:B val2:B...valN:B
  36 //       4           reg:W val:W
  37 //       6           reg:W cnt:W val1:W val2:W...valN:W
  38 //
  39 //       Ins
  40 //       ----------------------------------------------
  41 //       8           reg:W
  42 //       a           reg:W cnt:W
  43 //       c           reg:W
  44 //       e           reg:W cnt:W
  45 //
  46 //   20              Special purpose outs
  47 //       00          do indexed outs for seq, crtc, and gdc
  48 //                   indexreg:W cnt:B startindex:B val1:B val2:B...valN:B
  49 //       01          do indexed outs for atc
  50 //                   index-data_reg:W cnt:B startindex:B val1:B val2:B...valN:B
  51 //       02          do masked outs
  52 //                   indexreg:W andmask:B xormask:B
  53 //
  54 //   F0              Nop
  55 //
  56 //---------------------------------------------------------------------------
  57
  58 // some useful equates - major commands
  59
  60 #define EOD     0x000                   // end of data
  61 #define INOUT   0x010                   // do ins or outs
  62 #define METAOUT 0x020                   // do special types of outs
  63 #define NCMD    0x0f0                   // Nop command
  64
  65
  66 // flags for INOUT major command
  67
  68 //#define UNUSED    0x01                    // reserved
  69 #define MULTI   0x02                    // multiple or single outs
  70 #define BW      0x04                    // byte/word size of operation
  71 #define IO      0x08                    // out/in instruction
  72
  73 // minor commands for metout
  74
  75 #define INDXOUT 0x00                    // do indexed outs
  76 #define ATCOUT  0x01                    // do indexed outs for atc
  77 #define MASKOUT 0x02                    // do masked outs using and-xor masks
  78
  79
  80 // composite inout type commands
  81
  82 #define OB      (INOUT)                 // output 8 bit value
  83 #define OBM     (INOUT+MULTI)           // output multiple bytes
  84 #define OW      (INOUT+BW)              // output single word value
  85 #define OWM     (INOUT+BW+MULTI)        // output multiple words
  86
  87 #define IB      (INOUT+IO)              // input byte
  88 #define IBM     (INOUT+IO+MULTI)        // input multiple bytes
  89 #define IW      (INOUT+IO+BW)           // input word
  90 #define IWM     (INOUT+IO+BW+MULTI)     // input multiple words
  91
  92 /* EOF */