2 * DOS interrupt 16h handler
15 #include "debugtools.h"
21 DEFAULT_DEBUG_CHANNEL(int16);
23 /**********************************************************************
26 * Handler for int 16h (keyboard)
30 * KEYB.COM (DOS >3.2) adds functions to this interrupt, they are
31 * not currently listed here.
34 void WINAPI INT_Int16Handler( CONTEXT86 *context )
36 switch AH_reg(context) {
38 case 0x00: /* Get Keystroke */
39 /* Returns: AH = Scan code
40 AL = ASCII character */
41 TRACE("Get Keystroke\n");
42 INT_Int16ReadChar(&AL_reg(context), &AH_reg(context), FALSE);
45 case 0x01: /* Check for Keystroke */
46 /* Returns: ZF set if no keystroke */
48 /* AL = ASCII character */
49 TRACE("Check for Keystroke\n");
50 if (!INT_Int16ReadChar(&AL_reg(context), &AH_reg(context), TRUE))
60 case 0x02: /* Get Shift Flags */
63 #if 0 /* FIXME: cannot call USER functions here */
64 if (GetAsyncKeyState(VK_RSHIFT))
65 AL_reg(context) |= 0x01;
66 if (GetAsyncKeyState(VK_LSHIFT))
67 AL_reg(context) |= 0x02;
68 if (GetAsyncKeyState(VK_LCONTROL) || GetAsyncKeyState(VK_RCONTROL))
69 AL_reg(context) |= 0x04;
70 if (GetAsyncKeyState(VK_LMENU) || GetAsyncKeyState(VK_RMENU))
71 AL_reg(context) |= 0x08;
72 if (GetAsyncKeyState(VK_SCROLL))
73 AL_reg(context) |= 0x10;
74 if (GetAsyncKeyState(VK_NUMLOCK))
75 AL_reg(context) |= 0x20;
76 if (GetAsyncKeyState(VK_CAPITAL))
77 AL_reg(context) |= 0x40;
78 if (GetAsyncKeyState(VK_INSERT))
79 AL_reg(context) |= 0x80;
81 TRACE("Get Shift Flags: returning 0x%02x\n", AL_reg(context));
84 case 0x03: /* Set Typematic Rate and Delay */
85 FIXME("Set Typematic Rate and Delay - Not Supported\n");
88 case 0x09: /* Get Keyboard Functionality */
89 FIXME("Get Keyboard Functionality - Not Supported\n");
90 /* As a temporary measure, say that "nothing" is supported... */
94 case 0x0a: /* Get Keyboard ID */
95 FIXME("Get Keyboard ID - Not Supported\n");
98 case 0x10: /* Get Enhanced Keystroke */
99 TRACE("Get Enhanced Keystroke - Partially supported\n");
100 /* Returns: AH = Scan code
101 AL = ASCII character */
102 INT_Int16ReadChar(&AL_reg(context), &AH_reg(context), FALSE);
106 case 0x11: /* Check for Enhanced Keystroke */
107 /* Returns: ZF set if no keystroke */
109 /* AL = ASCII character */
110 TRACE("Check for Enhanced Keystroke - Partially supported\n");
111 if (!INT_Int16ReadChar(&AL_reg(context), &AH_reg(context), TRUE))
117 RESET_ZFLAG(context);
121 case 0x12: /* Get Extended Shift States */
122 FIXME("Get Extended Shift States - Not Supported\n");
126 FIXME("Unknown INT 16 function - 0x%x\n", AH_reg(context));
132 int WINAPI INT_Int16ReadChar(BYTE*ascii,BYTE*scan,BOOL peek)
134 BIOSDATA *data = DOSMEM_BiosData();
135 WORD CurOfs = data->NextKbdCharPtr;
137 /* check if there's data in buffer */
139 if (CurOfs == data->FirstKbdCharPtr)
142 while (CurOfs == data->FirstKbdCharPtr) {
143 /* no input available yet, so wait... */
147 /* read from keyboard queue */
148 TRACE("(%p,%p,%d) -> %02x %02x\n",ascii,scan,peek,((BYTE*)data)[CurOfs],((BYTE*)data)[CurOfs+1]);
149 if (ascii) *ascii = ((BYTE*)data)[CurOfs];
150 if (scan) *scan = ((BYTE*)data)[CurOfs+1];
153 if (CurOfs >= data->KbdBufferEnd) CurOfs = data->KbdBufferStart;
154 data->NextKbdCharPtr = CurOfs;
159 int WINAPI INT_Int16AddChar(BYTE ascii,BYTE scan)
161 BIOSDATA *data = DOSMEM_BiosData();
162 WORD CurOfs = data->FirstKbdCharPtr;
163 WORD NextOfs = CurOfs + 2;
165 TRACE("(%02x,%02x)\n",ascii,scan);
166 if (NextOfs >= data->KbdBufferEnd) NextOfs = data->KbdBufferStart;
167 /* check if buffer is full */
168 if (NextOfs == data->NextKbdCharPtr) return 0;
170 /* okay, insert character in ring buffer */
171 ((BYTE*)data)[CurOfs] = ascii;
172 ((BYTE*)data)[CurOfs+1] = scan;
174 data->FirstKbdCharPtr = NextOfs;