Leaked source code of windows server 2003
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/*++
Copyright (c) 1992 Microsoft Corporation
Module Name:
cmdcnst.h
Abstract:
This is the command string interpreter definitions
Environment:
kernel mode only
Notes:
Revision History:
--*/
//--------------------------------------------------------------------------
// Definition of the set/clear mode command language.
//
// Each command is composed of a major portion and a minor portion.
// The major portion of a command can be found in the most significant
// nibble of a command byte, while the minor portion is in the least
// significant portion of a command byte.
//
// maj minor Description
// ---- ----- --------------------------------------------
// 00 End of data
//
// 10 in and out type commands as described by flags
// flags:
//
// xxxx
// ||||
// |||+-------- unused
// ||+--------- 0/1 single/multiple values to output (in's are always
// |+---------- 0/1 8/16 bit operation single)
// +----------- 0/1 out/in instruction
//
// Outs
// ----------------------------------------------
// 0 reg:W val:B
// 2 reg:W cnt:W val1:B val2:B...valN:B
// 4 reg:W val:W
// 6 reg:W cnt:W val1:W val2:W...valN:W
//
// Ins
// ----------------------------------------------
// 8 reg:W
// a reg:W cnt:W
// c reg:W
// e reg:W cnt:W
//
// 20 Special purpose outs
// 00 do indexed outs for seq, crtc, and gdc
// indexreg:W cnt:B startindex:B val1:B val2:B...valN:B
// 01 do indexed outs for atc
// index-data_reg:W cnt:B startindex:B val1:B val2:B...valN:B
// 02 do masked outs
// indexreg:W andmask:B xormask:B
//
// F0 Nop
//
//---------------------------------------------------------------------------
// some useful equates - major commands
#define EOD 0x000 // end of data
#define INOUT 0x010 // do ins or outs
#define METAOUT 0x020 // do special types of outs
#define NCMD 0x0f0 // Nop command
// flags for INOUT major command
//#define UNUSED 0x01 // reserved
#define MULTI 0x02 // multiple or single outs
#define BW 0x04 // byte/word size of operation
#define IO 0x08 // out/in instruction
// minor commands for metout
#define INDXOUT 0x00 // do indexed outs
#define ATCOUT 0x01 // do indexed outs for atc
#define MASKOUT 0x02 // do masked outs using and-xor masks
// composite inout type commands
#define OB (INOUT) // output 8 bit value
#define OBM (INOUT+MULTI) // output multiple bytes
#define OW (INOUT+BW) // output single word value
#define OWM (INOUT+BW+MULTI) // output multiple words
#define IB (INOUT+IO) // input byte
#define IBM (INOUT+IO+MULTI) // input multiple bytes
#define IW (INOUT+IO+BW) // input word
#define IWM (INOUT+IO+BW+MULTI) // input multiple words
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