PDDREF:Generic IOCtl Commands
OS/2 device drivers are used to access the I/O hardware. The IOCtl functions provide a method for an application, or subsystem, to send device-specific control commands to a physical device driver. These IOCtls are subfunctions that are issued through the DosDevIOCtl API function request. The DosDevIOCtl function request can be used only by OS/2 applications; the INT 21h IOCtl request can be used only by DOS applications.
The category and function fields are as follows. Each code is contained in a byte:
Category Code 0xxx xxxx OS/2-defined 1xxx xxxx User-defined _xxx xxxx Code.
Function Code 0xxx xxxx Return error, if unsupported 1xxx xxxx Ignore, if unsupported x0xx xxxx Intercepted by the OS/2 operating system x1xx xxxx Passed to driver xx0x xxxx Sends data and commands to device xx1x xxxx Queries data and information from device ___x xxxx Subfunction.
Notice that the send/query data bit is intended only to standardize the function set; it plays no critical role. Some functions can contain both command and query elements. Such commands are defined as sends data.
Generic IOCtl Example
The DosDevIOCtl function sends the request to the physical device driver request packet. The physical device driver receives the request packet, and looks for the Command Code (Command 16 is the generic IOCtl command) to identify the request. Notice that each device driver can define the structure of the Data Packet and the Parameter Packet, but all device drivers use the same request header.
The 16-bit calling sequence for DosDevIOCtl is shown below:
EXTRN DosDevIOCtl:Far PUSH@ OTHER Data ; Data Packet address PUSH@ OTHER ParmList ; Parameter Packet address PUSH WORD Function ; Function code PUSH WORD Category ; Category code PUSH WORD DevHandle ; User's device driver file handle CALL DosDevIOCtl
The 32-bit calling sequence for DosDevIOCtl is shown below:
PUSH@ DWORD DataLengthInOut ; Data Length Address PUSH DWORD DataLengthMAX ; Max size of Data Packet PUSH@ OTHER Data ; Data Packet Address PUSH@ DWORD ParmLengthInOut ; Parm Length Address PUSH DWORD ParmLengthMax ; Max size of Parm List PUSH@ OTHER ParmList ; Parameter Packet Address PUSH DWORD Function ; Function Code PUSH DWORD Category ; Category Code PUSH DWORD DevHandle ; User's device driver file handle Call DOSDevIOCtl
DosDevIOCtl2 performs the same function as DosDevIOCtl, and also provides Length fields for the Data and Parameter List buffers. These Length fields should be passed to the Device Helper service VerifyAccess when the physical device driver is determining whether it has access to the application's Data and Parameter List buffers. The Length fields also tell physical network device drivers the amount of data residing in these buffers for the transfer to other network nodes.
The 16-bit calling sequence for DosDevIOCtl2 is shown below:
EXTRN DosDevIOCtl2:Far PUSH@ OTHER Data ; Data Packet address PUSH WORD DataLength ; Data Packet length PUSH@ OTHER ParmList ; Parameter Packet address PUSH WORD ParmLength ; Parameter Packet length PUSH WORD Function ; Function code PUSH WORD Category ; Category code PUSH WORD DevHandle ; User's device driver file handle CALL DosDevIOCtl2
Generic IOCtl Function Table
The list of categories and functions for the generic IOCtl requests are as follows:
Category Function Description
01h Serial Device Control
14h Reserved
34h Reserved
41h Set Bit Rate
42h Set Line Characteristics (stop, parity, data bits)
43h Extended Set Bit Rate
44h Transmit Byte Immediate
45h Set Break OFF
46h Set Modem Control Signals
47h Behave As If XOFF Received (stop transmit)
48h Behave As If XON Received (start transmit)
49h Reserved
4Bh Set Break ON
53h Set Device Control Block (DCB) Parameters
54h Set Enhanced Mode Parameters
61h Query Current Bit Rate
62h Query Line Characteristics
63h Extended Query Bit Rate
64h Query COM Status
65h Query Transmit Data Status
66h Query Modem Control Output Signals
67h Query Current Modem Input Signals
68h Query Number of Characters in Receive Queue
69h Query Number of Characters in Transmit Queue
6Dh Query COM Error
72h Query COM Event Information
73h Query Device Control Block (DCB) Parameters
74h Query Enhanced Mode Parameters
02h Reserved
03h Video Control
70h Allocate an LDT Selector
71h Deallocate an LDT Selector
72h Query Pointer Draw Address
73h Initialize Call Vector Table
74h ABIOS Pass-Through
75h Allocate an LDT Selector with Offset
76h Allocate an LDT Selector with Background Validation Options
7Eh Allocate Video Buffer
7Fh Get Address to ROM Font
04h Keyboard Control
50h Set Code Page
51h Set Input Mode (Default ASCII)
52h Set Interim Character Flags
53h Set Shift State
54h Set Typematic Rate and Delay
55h Reserved
56h Set Session Manager Hot Key
57h Set KCB
58h Set Code Page Number
59h Set Read/Peek Notification
5Ah Alter Keyboard LEDs
5Bh Reserved
5Ch Set NLS and Custom Code Page
5Dh Create New Logical Keyboard
5Eh Destroy Logical Keyboard
71h Query Input Mode
72h Query Interim Character Flags
73h Query Shift State
74h Read Character Data Records
75h Peek Character Data Record
76h Query Session Manager Hot Key
77h Query Keyboard Type
78h Query Code Page Number
79h Translate Scan Code to ASCII
7Ah Query Keyboard Hardware ID
7Bh Query Keyboard Code Page Support Information
05h Parallel Port Control
42h Set Frame Control (CPL, LPI)
43h Reserved
44h Set Infinite Retry
45h Reserved
46h Initialize Parallel Port
47h Reserved
48h Activate Font
49h Reserved
4Bh Reserved
4Ch Reserved
4Dh Set Print-Job Title
4Eh Set Parallel Port Write Time-Out Value
4Fh Reserved
50h Reserved
51h Reserved
52h Set Parallel Port Communication Mode
53h Set Parallel Port Data Transfer Mode
62h Query Frame Control
63h Reserved
64h Query Infinite Retry
65h Reserved
66h Query Parallel Port Status
67h Reserved
68h Reserved
69h Query Active Font
6Ah Verify Font
6Bh Reserved
6Ch Reserved
6Dh Reserved
6Eh Query Parallel Port Write Time-Out Value
6Fh Reserved
70h Reserved
71h Reserved
72h Query Parallel Port Communication Mode
73h Query Parallel Port Data Transfer Mode
74h Query Parallel Port Device ID
06h Light Pen Control
07h Mouse Control
50h Reserved
51h Notification of Display Mode Change
52h Reserved
53h Reassign Current Mouse Scaling Factors
54h Assign New Mouse Event Mask
55h Reassign Mouse Threshold Values
56h Set Pointer Shape
57h Unmark Collision Area
58h Mark Collision Area
59h Specify/Replace Pointer Screen Position
5Ah Set OS/2-Mode Pointer Draw Device Driver Address
5Bh Reserved
5Ch Set Current Physical Mouse Device Driver Status Flags
5Dh Notification of Mode Switch Completion
60h Query Number of Mouse Buttons Supported
61h Query Mouse Device Motion Sensitivity
62h Query Current Physical Mouse Device Driver Status Flags
63h Read Mouse Event Queue
64h Query Current Event Queue Status
65h Query Current Mouse Event Mask
66h Query Current Mouse Scaling Factors
67h Query Current Pointer Screen Position
68h Query Current Pointer Shape
69h Query Mouse Threshold Values
6Ah Query Physical Mouse Device Driver Level/Version
6Bh Query Pointing Device ID
08h Logical Disk Control
00h Lock Drive
01h Unlock Drive
02h Redetermine Media (end format)
03h Set Logical Map
04h Begin Format
20h Block Removable
21h Query Logical Map
22h Reserved
40h Removable Media Control
43h Set Device Parameters
44h Write/Read/Verify Track
45h Format and Verify Track
5Dh Diskette Control
5Eh Reserved
5Fh Reserved
60h Query Media Sense
63h Query Device Parameters
66h Status
09h Physical Disk Control
00h Lock Physical Drive
01h Unlock Physical Drive
44h Physical Write Track
63h Query Physical Device Parameters
64h Physical Read Track
65h Physical Verify Track
0Ah Character Device Monitor Control
40h Register Monitor
0Bh General Device Control
01h Flush Input Buffer
02h Flush Output Buffer
41h System Notifications for Physical Device Drivers
60h Query Monitor Support
0Ch Advanced Power Management
40h Send Power Event
41h Set Power Event Res
42h Reserved
60h Query Power Status
61h Query Power Event
62h Query PowerInfo
0Dh-7Fh Reserved Category Codes
80h Screen Control
00h Get Current Video Memory Bank
01h Set Current Video Memory Bank
02-07Fh Reserved
08h Return Adapter Video Configuration
09h Return Manufacturer-Specific Adapter Data
0Ah Update Adapter Video Information
0Bh Return Linear Address Mapped to Physical Address
0Ch-07Fh Reserved
80h OEMHLP Controls
00h Query OEM Adaptation Information
01h Query Machine Information
02h Query Display Combination Code
03h Return Video Fonts
04h Read EISA Configuration Information-Subfunction 00
04h Read EISA Function Information-Subfunction 01
05h Query ROM BIOS Information
06h Query Miscellaneous Video Information
07h Query Video Adapter
08h Query SVGA Information
09h Query Memory Information
0Ah Query, Display Mode, Query, and Set (DMQS) Information
0Bh Access PCI BIOS
0Bh Query PCI BIOS - Subfunction 00h
0Bh Find PCI Device - Subfunction 01h
0Bh Find PCI Class Code - Subfunction 02h
0Bh Read PCI Configuration Space - Subfunction 03h
0Bh Write PCI Configuration Space - Subfunction 04h
80h TESTCFG.SYS
40h Obtain a Copy of BIOS/Adapter Memory
41h Issue an "IN" I/O Instruction
42h Issue an "OUT" I/O Instruction
60h Query Bus Architecture Function
61h Return All POS IDs
62h Return All EISA IDs
80h Resource Manager
01h Get Resource Manager Node Information
02h Enumerate Resource Manager Nodes
80h CD-ROM Drive and Disc Control
40h Reset Drive
44h Eject Disk
45h Close Tray
46h Lock/Unlock Door
50h Seek
60h Device Status
61h Identify CD-ROM Driver
63h Return Sector Size
70h Location of Drive Head
72h Read Long
78h Return Volume Size
79h Get UPC
81h CD-ROM Audio Control
40h Audio Channel Control
50h Play Audio
51h Stop Audio
52h Resume Audio
60h Return Audio-Channel Information
61h Return Audio-Disc Information
62h Return Audio-Track Information
63h Return Audio-Subchannel Q Information
65h Return Audio-Status Information
81h Touch-Device-Dependent Driver Control
50h Reserved
51h Reserved
52h Set Calibration Constants
53h Read Data
54h Set Data Mode
55h Set Click-Lock Parameters
56h Set Touch Thresholds
57h Set Emulation XY Offset
58h Set Data Report Rate
59h Set Low-Pass Filter
5Ah Write Memory Location
5Bh Reserved
5Ch Reserved
5Dh Reserved
5Eh Reserved
5Fh Reserved
60h Get Calibration Constants
61h Get Data Mode
62h Get Click Lock Parameters
63h Get Touch Thresholds
64h Get Emulation XY Offset
65h Get Data Report Rate
66h Get Low Pass Filter
67h Read Memory Location
81h Touch-Device-Independent Driver Control
50h Set Coordinate System
51h Reserved
52h Set Selection Mechanism
53h Set Event Mask
54h Set Queue Size
55h Set Emulation State
60h Set Coordinate System
61h Reserved
62h Get Selection Mechanism
63h Get Event Mask
64h Get Queue Size
65h Get Emulation State
66h Get Read Event Queue
Category 01h ASYNC (RS232-C) Control IOCtl Commands
Whenever an IOCtl command calls for a NULL pointer, it is the responsibility of the application to set one up for the appropriate Parameter or Data Packet pointer before calling the physical device driver. IOCtls can be interpreted differently by future releases if the pointer is not a NULL pointer. If a NULL pointer is called for and it is not received by the device driver, it is considered an invalid Parameter or Data Packet value.
The physical device driver services each communications port (COM1, COM2, and so forth) independently. IOCtls issued to the physical device driver for a given port have no effect on any other communications ports that the physical device driver is servicing. The application cannot assume a given timing relationship between when the IOCtls are executed and when data is received or transmitted by the ASYNC hardware. Data Carrier Detect (DCD) is the same signal as Receiver Line Signal Detect (RLSD).
The following is a summary of the Category 01h IOCtl Commands:
Function ³Description ³ 14h ³Reserved ³ ³ 34h ³Reserved ³ ³ 41h ³Set Bit Rate ³ ³ 42h ³Set Line Characteristics (stop, parity, data bits)³ ³ 43h ³Extended Set Bit Rate ³ ³ 44h ³Transmit Byte Immediate ³ ³ 45h ³Set Break OFF ³ ³ 46h ³Set Modem Control Signals ³ ³ 47h ³Behave as if XOFF Received (stop transmit) ³ ³ 48h ³Behave as if XON Received (start transmit) ³ ³ 49h ³Reserved ³ ³ 4Bh ³Set Break ON ³ ³ 53h ³Set Device Control Block (DCB) Parameters ³ ³ 54h ³Set Enhanced Mode Parameters ³ ³ 61h ³Query Current Bit Rate ³ ³ 62h ³Query Line Characteristics ³ ³ 63h ³Extended Query Bit Rate ³ ³ 64h ³Query COM Status ³ ³ 65h ³Query Transmit Data Status ³ ³ 66h ³Query Modem Control Output Signals ³ ³ 67h ³Query Current Modem Input Signals ³ ³ 68h ³Query Number of Characters in Receive Queue ³ ³ 69h ³Query Number of Characters in Transmit Queue ³ ³ 6Dh ³Query COM Error ³ ³ 72h ³Query COM Event Information ³ ³ 73h ³Query Device Control Block (DCB) Parameters ³ ³ 74h ³Query Enhanced Mode Parameters ³
Category 03h Video Control IOCtl Commands
The following is a summary of the Category 03h Video Control IOCtl Commands:
Function Description ³ 70h ³Allocate an LDT Selector ³ ³ 71h ³Deallocate an LDT Selector ³ ³ 72h ³Query Pointer Draw Address ³ ³ 73h ³Initialize Call Vector Table ³ ³ 74h ³ABIOS Pass-Through ³ ³ 75h ³Allocate an LDT Selector with Offset ³ ³ 76h ³Allocate an LDT Selector with Background ³ ³ ³Validation Options ³ ³ 7Eh ³Allocate Video Buffer ³ ³ 7Fh ³Get Address to ROM Font ³
Category 04h Keyboard Control IOCtl Commands
The following is a summary of the Category 04h IOCtl Commands:
Function Description ³ 50h ³Set Code Page ³ ³ 51h ³Set Input Mode (Default ASCII) ³ ³ 52h ³Set Interim Character Flags ³ ³ 53h ³Set Shift State ³ ³ 54h ³Set Typematic Rate and Delay ³ ³ 55h ³Reserved ³ ³ 56h ³Set Session Manager Hot Key ³ ³ 57h ³Set KCB ³ ³ 58h ³Set Code Page Number ³ ³ 59h ³Set Read/Peek Notification ³ ³ 5Ah ³Alter Keyboard LEDs ³ ³ 5Bh ³Reserved ³ ³ 5Ch ³Set NLS and Custom Code Page ³ ³ 5Dh ³Create a New Logical Keyboard ³ ³ 5Eh ³Destroy a Logical Keyboard ³ ³ 71h ³Query Input Mode ³ ³ 72h ³Query Interim Character Flags ³ ³ 73h ³Query Shift State ³ ³ 74h ³Read Character Data Records ³ ³ 75h ³Peek Character Data Record ³ ³ 76h ³Query Session Manager Hot Key ³ ³ 77h ³Query Keyboard Type ³ ³ 78h ³Query Code Page Number ³ ³ 79h ³Translate Scan Code to ASCII ³ ³ 7Ah ³Query Keyboard Hardware ID ³ ³ 7Bh ³Query Keyboard Code Page Support Information ³
Category 05h Parallel Port Control IOCtl Commands
The following is a summary of Category 05h IOCtl Commands:
³Function ³Description ³ ³ 42h ³Set Frame Control (CPL, LPI) ³ ³ 43h ³Reserved ³ ³ 44h ³Set Infinite Retry ³ ³ 45h ³Reserved ³ ³ 46h ³Initialize Parallel Port ³ ³ 47h ³Reserved ³ ³ 48h ³Activate Font ³ ³ 49h ³Reserved ³ ³ 4Bh ³Reserved ³ ³ 4Ch ³Reserved ³ ³ 4Dh ³Set Print-Job Title ³ ³ 4Eh ³Set Parallel Port Write Timeout Value ³ ³ 4Fh ³Reserved ³ ³ 50h ³Reserved ³ ³ 51h ³Reserved ³ ³ 52h ³Set Parallel Port Communication Mode ³ ³ 53h ³Set Parallel Port Data Transfer Mode ³ ³ 62h ³Query Frame Control ³ ³ 63h ³Reserved ³ ³ 64h ³Query Infinite Retry ³ ³ 65h ³Reserved ³ ³ 66h ³Query Parallel Port Status ³ ³ 67h ³Reserved ³ ³ 68h ³Reserved ³ ³ 69h ³Query Active Font ³ ³ 6Ah ³Verify Font ³ ³ 6Bh ³Reserved ³ ³ 6Ch ³Reserved ³ ³ 6Dh ³Reserved ³ ³ 6Eh ³Query Parallel Port Write Timeout Value ³ ³ 6Fh ³Reserved ³ ³ 70h ³Reserved ³ ³ 71h ³Reserved ³ ³ 72h ³Query Parallel Port Communication Mode ³ ³ 73h ³Query Parallel Port Data Transfer Mode ³ ³ 74h ³Query Parallel Port Device ID ³
Category 07h Mouse Control IOCtl Commands
The following is a summary of Category 07h IOCtl Commands:
Function ³Description 50h ³Reserved 51h ³Notification of Display Mode Change ³ 52h ³Reserved ³ 53h ³Reassign Current Mouse Scaling Factors ³ 54h ³Assign New Mouse Event Mask ³ 55h ³Reassign Mouse Threshold Values ³ 56h ³Set Pointer Shape ³ 57h ³Unmark Collision Area ³ 58h ³Mark Collision Area ³ 59h ³Specify/Replace Pointer Screen Position ³ 5Ah ³Set OS/2 Mode Pointer Draw Device Driver Address ³ 5Bh ³Reserved ³ 5Ch ³Set Current Physical Mouse Device Driver Status Flags ³ 5Dh ³Notification of Mode Switch Completion ³ 60h ³Query Number of Mouse Buttons Supported ³ 61h ³Query Mouse Device Motion Sensitivity ³ 62h ³Query Current Physical Mouse Device Driver Status ³ ³ ³Flags ³ 63h ³Read Mouse Event Queue ³ 64h ³Query Current Event Queue Status ³ 65h ³Query Current Mouse Event Mask ³ 66h ³Query Current Mouse Scaling Factors ³ 67h ³Query Current Pointer Screen Position ³ 68h ³Query Current Pointer Shape ³ 69h ³Query Mouse Threshold Values ³ 6Ah ³Query Physical Mouse Device Driver Level/Version ³ ³ ³Number ³ 6Bh ³Query Pointing Device ID
Category 08h Logical Disk Control IOCtl Commands
The following is a summary of Category 08h IOCtl Commands:
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³Function ³Description ³ 00h ³Lock Drive ³ 01h ³Unlock Drive ³ 02h ³Redetermine Media ³ 03h ³Set Logical Map ³ 04h ³Begin Format ³ 20h ³Block Removable ³ 21h ³Query Logical Map ³ 22h ³Reserved ³ 40h ³Removable Media Control ³ 43h ³Set Device Parameters ³ 44h ³Write Logical Track ³ 45h ³Format and Verify Track ³ 5Dh ³Diskette Control ³ 5Eh ³Reserved ³ 5Fh ³Reserved ³ 60h ³Query Media Sense ³ 63h ³Query Device Parameters ³ 64h ³Read Logical Track ³ 65h ³Verify Logical Track ³ 66h ³Status
Category 09h Physical Disk Control IOCtl Commands
Category 09h is used to access physical partitionable hard disks. The handle used for Category 09h command is returned by the DosPhysicalDisk (Function 2) API function. (See the OS/2 Control Program Programming Reference for more information). This handle is used to tell the system which physical disk is accessed by the IOCtl command.
The Physical Disk Control commands relate to the entire partitionable hard disk. Direct track and sector I/O start at the beginning of the physical drive. PDSK_GETPHYSDEVICEPARAMS, describes the entire physical device.
The following is a summary of Category 09h IOCtl Commands:
Function Description 00h Lock Physical Drive 01h Unlock Physical Drive 44h Write Physical Track 63h Query Physical Device Parameters 64h Read Physical Track 65h Verify Physical Track
Category 0Ah Character Device Monitor IOCtl Command
The following is the Category 0Ah IOCtl Command:
Function Description 40h Register Monitor
Category 0Bh General Device Control IOCtl Commands
The following is a summary of Category 0Bh IOCtl Commands:
Function Description 01h Flush Input Buffer 02h Flush Output Buffer 41h System Notifications for Physical Device Drivers 60h Query Monitor Support
Category 0Ch Advanced Power Management
Function Description 40h Send Power Event 41h Set Power Event Resource 42h - 44h Reserved 45h OEM APM Function 60h Query Power Status 61h Query Power Event 62h Query Power Information 63h Query Power State
Category 80h Screen Control IOCtl Commands
The following video IOCtls are defined and supported by the SCREENDD$ device driver, by way of the DosDevIOCtl call. The IOCtl category code is 80h (defined as SCREENDD_CATEGORY).
The function codes within the SCREENDD_CATEGORY are:
Function Description 00h Get Current Video Memory Bank 01h Set Current Video Memory Bank 02h-07h Reserved 08h Return Adapter Video Configuration 09h Return Manufacturer-Specific Adapter Data 0Ah Update Adapter Video Memory Information 0Bh Return Linear Address Mapped to Physical Address 0Ch-7Fh Reserved
An example of the DosDevIOCtl calling convention for the Screen IOCtls follows:
int PASCAL near videoIoctl(VOID *data,VOID *parm,USHORT function)
{
unsigned hScreenDD; /* handle of SCREENDD$ dev driver */
unsigned OpenAction; /* action taken to open device */
unsigned rc; /* function return code */
if (!(rc = DosOpen(SCREENDD_NAME, (PHFILE)&hScreenDD, (PUSHORT)&OpenAction,
NO_SIZE, NO_ATTRIBUTES, OPEN_IF_EXISTS, NO_INHERIT+DENY_NONE+READ_WRITE,
RESERVED_LONG)))
{
rc = DosDevIOCtl(data,
parm,
function,
SCREENDD_CATEGORY,
(HFILE)hScreenDD);
DosClose(hScreenDD);
}
return (rc);
Category 80h OEMHLP IOCtls
The OEMHLP interface was originally designed to allow Original Equipment Manufacturers (OEMs) to modify and adapt the OS/2 operating system to run on their hardware. In the past, IBM supported the OS/2 operating system on IBM hardware only. Therefore, OEMs had to build modified versions of the OS/2 operating system. The OEMHLP interface facilitated this process.
IBM currently tests the OS/2 operating system on a wide variety of OEM hardware. It is no longer necessary for OEMs to adapt the OS/2 operating system to their machines. Now the OEMHLP interface can be used to obtain real-mode information. This information can be passed to applications and device drivers running in protect mode. Applications and physical device drivers running in protect mode cannot access BIOS through the INT interface. The OEMHLP interface allows access to BIOS information and functions that are essential to these programs.
For example, you might want to issue INT 15h calls from your device driver initialization code to determine if an Extended Industry Standard Architecture (EISA) adapter is present. The following examples show the methods to determine if a specific EISA or Micro Channel adapter is present.
Using the Query Adapter ID to Verify EISA Adapter
The following example uses the OEMHLP IOCtl interface to verify the EISA card ID:
USHORT FindMyEISACard(void)
{
HFILE filehandle;
USHORT action;
EISAFunctionInfo.efi_SubFunc = OEM_GET_SLOT_INFO; /* EISA Get Slot Info */
EISAFunctionInfo.efi_Slot = 0; /* Slot 0 */
rc = DosOpen("OEMHLP$",
&filehandle,
&action,
0L,
0,
1,
0x40,
0L);
if (rc == 0)
{
for(index=1;index<CFG_MAX_EISA_SLOTS;index++) /* For each slot */
{
EISAFunctionInfo.efi_Slot = (UCHAR) index; /* Slot Number */
EISASlotInfo.esi_CardID = 0; /* Reset Card ID value*/
rc = DosDevIOCtl((PVOID)&EISASlotInfo, /* Data Packet */
(PVOID)&EISAFunctionInfo, /* Parm Packet */
(USHORT)OEMHLP_QUERYEISACONFIG,
(USHORT)OEMHLP_CATEGORY,
(HFILE)filehandle);
/* If IOCtl successful and slot has adapter, then store away
the adapter ID, otherwise mark as empty with a zero.
*/
if((rc==0)&&(EISASlotInfo.esi_Error==0))
{
if (EISASlotInfo.esi_CardID == MYCARDID)
DosClose(filehandle); /* Close handle to OEMHLP$ */
return(FOUND);
}
}
DosClose(filehandle); /* Close handle to OEMHLP$ */
}
return(NOTFOUND);
}
Using the DevHlp_ABIOSCall to Verify Micro Channel Adapter
The following example uses the DevHlp_ABIOSCall to verify the Micro Channel POS ID:
USHORT FindMyMicroChannelCard(void)
{
USHORT i,rc; /* Index and return code */
USHORT LID; /* Logical ID */
if (GetLIDEntry(POS,0,1,&LID))
return(NOTFOUND);
/* Get length of RB to use for reading POS data. */
POSLenRB.rb.RBLen = sizeof(POSLENRB);
POSLenRB.rb.Func = 0x01;
POSLenRB.rb.LID = LID;
POSLenRB.rb.Unit = 0;
POSLenRB.rb.Resv1 = 0;
POSLenRB.rb.Resv2 = 0;
POSLenRB.Rsv1 = 0;
POSLenRB.Rsv2 = 0;
POSLenRB.Rsv3 = 0;
rc = ABIOSCall( LID, &POSLenRB, 0);
/*Is my request block big enough? */
if ((rc==0) && (sizeof(POSRB) >= POSLenRB.RBLen))
{
RB.rb.RBLen = POSLenRB.RBLen; /* request block length */
RB.rb.Func = 0x0b; /* read stored POS data to mem */
RB.rb.LID = LID; /* Logical ID */
RB.rb.Unit = 0;
RB.DataBuf = (ULONG)(FARPOINTER)&POSData;
for(i=0;i<=CFG_MAX_POS_SLOTS;i++) /* For each slot, get POS ID */
{
RB.Slot = (UCHAR)i;
rc = ABIOSCall(LID,&RB,0);
if((rc==0)&&(RB.rb.RetCode==0))
if (RB.AdapterID == MYCARD)
{
FreeLIDEntry(LID);
return(FOUND);
}
}
}
FreeLIDEntry(LID); /* Release LID Entry */
return(NOTFOUND);
}
OEMHLP IOCtls Summary
The following is a summary of Category 80h OEMHLP IOCtl Commands:
Function Description 00h Query OEM Adaptation Information 01h Query Machine Information 02h Query Display Combination Code 03h Return Video Fonts 04h Read EISA Slot Configuration Information - Subfunction 00 04h Read EISA Function Configuration Information - Subfunction 01 05h Query ROM BIOS Information 06h Query Miscellaneous Video Information 07h Query Video Adapter 08h Query SVGA Information 09h Query Memory Information 0Ah Query Display Mode, Query and Set (DMQS) Information 0Bh Access PCI BIOS Information 0Bh Query PCI BIOS Information - Subfunction 00h 0Bh Find PCI Device - Subfunction 01h 0Bh Find PCI Class Code - Subfunction 02h 0Bh Read PCI Configuration Space - Subfunction 03h 0Bh Write PCI Configuration Space - Subfunction 04h
Category 80h Adapter Presence-Check Services (TESTCFG.SYS)
The TESTCFG device driver provides services for automatic detection of Original Equipment Manufacturer (OEM) hardware interfaces. Functions provided by this driver are accessed entirely by opening the device name TESTCFG$ and using the following Category 80h IOCtls.
Function Description 40H Get Copy of BIOS/Adapter Memory 41H Issue an "IN" I/O Instruction 42H Issue an "OUT" I/O Instruction 60H Get Bus Architecture Function 61H Return All POS IDs 62H Return All EISA IDs
Category 80h Resource Manager IOCtl Commands
RESOURCE.SYS provides two IOCtls that allow a ring 3 application to obtain a "snapshot" of the Resource Management data structures. Obtaining a snapshot of the Resource Management data structures consists of the following two steps:
1.- A data structure representing a depth-first traversal of the Resource Manager node structure is obtained.
2.- For each node traversed, the following information is provided:
- A Resource Manager handle to access the node.
- The depth of the node in the tree structure.
3.- A copy of each Resource Manager node can be obtained by supplying the node handle returned in Step 1.
Function Description 01h Get Resource Manager Node Data 02h Enumerate Resource Manager Nodes
Category 80h CD-ROM Drive and Disc IOCtl Commands
The OS/2 CD-ROM Device Manager provides an interface through generic IOCtls.
The CD-ROM device driver returns error values in the range of hex FF00 through FF14. DOS DevIOCtl return codes are described in the OS/2 Programming Reference manuals.
Function Description 40h Reset Drive 44h Eject Disc 45h Close Tray 46h Lock/Unlock Door 50h Seek 60h Return Device Status 61h Identify CD-ROM Driver 63h Return Sector Size 70h Report Location of Drive Head 72h Read Long 78h Return Volume Size 79h Get UPC
Category 81h CD-ROM Audio IOCtl Commands
The OS/2 CD-ROM Device Manager provides an interface through generic IOCtls.
The CD-ROM device driver returns error values in the range of hex FF00 through FF14. DOSDevIOCtl return codes are described in the OS/2 Programming Reference manuals.
Function Description 40h Set Audio Channel Control 50h Play Audio 51h Stop Audio 52h Resume Audio 60h Return Audio-Channel Information 61h Return Audio-Disk Information 62h Return Audio-Track Information 63h Return Audio-Subchannel Q Information 65h Return Audio-Status Information
Category 81h Touch Device-Dependent Driver
All Touch device driver IOCtl commands share Category 81h commands, which are distinguished by the device name used in the device Open (PDITOU$ for the device-dependent driver, TOUCH$ for the device-independent driver).
Device-Dependent Device Driver Command Summary
The following table describes the Category 81h Touch Device-Dependent Driver IOCtl commands:
Function Description 50h Reserved. 51h Reserved. 52h Set Calibration Constants 53h Read Data 54h Set Data Mode 55h Set Click-Lock Parameters 56h Set Touch Thresholds 57h Set Emulation XY Offset 58h Set Data Report Rate 59h Set Low Pass Filter 5Ah Write Memory Location 5Bh Reserved. 5Ch Reserved. 5Dh Reserved. 5Eh Reserved. 5Fh Reserved. 60h Get Calibration Constants 61h Get Data Mode 62h Get Click-Lock Parameters 63h Get Touch Thresholds 64h Get Emulation XY Offset 65h Get Data Report Rate 66h Get Low Pass Filter 67h Read Memory Location
Category 81h Touch Device-Independent Driver
All Touch device driver IOCtl commands share Category 81h commands, which are distinguished by the device name used in the device Open (PDITOU$ for the device-dependent driver, TOUCH$ for the device-independent driver).
The following lists and describes the Category 81h Touch Device-Independent Driver:
Function Description 50h Set Coordinate System 51h Reserved 52h Set Selection Mechanism 53h Set Event Mask 54h Set Queue Size 55h Set Emulation State 60h Get Coordinate System 61h Reserved 62h Get Selection Mechanism 63h Get Event Mask 64h Get Queue Size 65h Get Emulation State 66h Get Read Event Queue