ReactOS 0.4.16-dev-197-g92996da
cmdcnst.h
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1/*
2 * PROJECT: ReactOS VGA Miniport Driver
3 * LICENSE: Microsoft NT4 DDK Sample Code License
4 * FILE: win32ss/drivers/miniport/vga_new/cmdcnst.h
5 * PURPOSE: Command Code Definitions for VGA Command Streams
6 * PROGRAMMERS: Copyright (c) 1992 Microsoft Corporation
7 */
8
9#pragma once
10
11//--------------------------------------------------------------------------
12// Definition of the set/clear mode command language.
13//
14// Each command is composed of a major portion and a minor portion.
15// The major portion of a command can be found in the most significant
16// nibble of a command byte, while the minor portion is in the least
17// significant portion of a command byte.
18//
19// maj minor Description
20// ---- ----- --------------------------------------------
21// 00 End of data
22//
23// 10 in and out type commands as described by flags
24// flags:
25//
26// xxxx
27// ||||
28// |||+-------- unused
29// ||+--------- 0/1 single/multiple values to output (in's are always
30// |+---------- 0/1 8/16 bit operation single)
31// +----------- 0/1 out/in instruction
32//
33// Outs
34// ----------------------------------------------
35// 0 reg:W val:B
36// 2 reg:W cnt:W val1:B val2:B...valN:B
37// 4 reg:W val:W
38// 6 reg:W cnt:W val1:W val2:W...valN:W
39//
40// Ins
41// ----------------------------------------------
42// 8 reg:W
43// a reg:W cnt:W
44// c reg:W
45// e reg:W cnt:W
46//
47// 20 Special purpose outs
48// 00 do indexed outs for seq, crtc, and gdc
49// indexreg:W cnt:B startindex:B val1:B val2:B...valN:B
50// 01 do indexed outs for atc
51// index-data_reg:W cnt:B startindex:B val1:B val2:B...valN:B
52// 02 do masked outs
53// indexreg:W andmask:B xormask:B
54//
55// F0 Nop
56//
57//---------------------------------------------------------------------------
58
59// some useful equates - major commands
60
61#define EOD 0x000 // end of data
62#define INOUT 0x010 // do ins or outs
63#define METAOUT 0x020 // do special types of outs
64#define NCMD 0x0f0 // Nop command
65
66
67// flags for INOUT major command
68
69//#define UNUSED 0x01 // reserved
70#define MULTI 0x02 // multiple or single outs
71#define BW 0x04 // byte/word size of operation
72#define IO 0x08 // out/in instruction
73
74// minor commands for metout
75
76#define INDXOUT 0x00 // do indexed outs
77#define ATCOUT 0x01 // do indexed outs for atc
78#define MASKOUT 0x02 // do masked outs using and-xor masks
79
80
81// composite inout type commands
82
83#define OB (INOUT) // output 8 bit value
84#define OBM (INOUT+MULTI) // output multiple bytes
85#define OW (INOUT+BW) // output single word value
86#define OWM (INOUT+BW+MULTI) // output multiple words
87
88#define IB (INOUT+IO) // input byte
89#define IBM (INOUT+IO+MULTI) // input multiple bytes
90#define IW (INOUT+IO+BW) // input word
91#define IWM (INOUT+IO+BW+MULTI) // input multiple words
92
93/* EOF */